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Snip 3 05 06 85 electrical devices. Laying wires and cables in steel pipes

BUILDING REGULATIONS

ELECTRICAL DEVICES

SNiP 3.05.06-85

GOSSTROY USSR

MOSCOW 1988

DEVELOPED by VNIIproektelektromontazhem of the USSR Ministry of Assembly and Special Construction (V.K. N.I. Korotkov, E.G. Panteleev, Candidate of Technical Sciences Yu.A. Roslov, S.N. Starostin, A.K. V. Balanov, N.A. Voinilovich, A.L. Gonchar, N.M. Lerner), Sellenergoproekt of the USSR Ministry of Energy (G.F.Sumin, Y.V. , A.A. Koba).

INTRODUCED by the USSR Ministry of Assembly and Construction.

PREPARED FOR APPROVAL by the Glavtekhnormirovanie Gosstroy of the USSR (BA Sokolov).

With the entry into force of SNiP 3.05.06-85 "Electrical devices" SNiP III-33-76 *, SN 85-74, SN 102-76 * are no longer valid.

AGREED with the Glavgosenergonadzor of the USSR Ministry of Energy (letter of January 31, 1985, No. 17-58), GUPO of the USSR Ministry of Internal Affairs (letter of September 16, 1985, No. 7/6/3262), the chief sanitary doctor of the USSR Ministry of Health (letter of January 14, 1985 . No. 122-4 / 336-4).

When using a regulatory document, the approved changes in building codes and regulations should be taken into account and state standards published in the journal "Bulletin of Construction Technology", "Collection of changes to building codes and regulations" of the USSR State Construction Committee and the information index "USSR State Standards" of the State Standard.

These rules apply to the production of work during the construction of new, as well as during the reconstruction, expansion and technical re-equipment of existing enterprises for the installation and commissioning of electrical devices, including: electrical substations, distribution points and overhead power lines with a voltage of up to 750 kV, cable lines with a voltage of up to 220 kV, relay protection, power electrical equipment, indoor and outdoor electrical lighting, grounding devices.

The rules do not apply to the production and acceptance of work on the installation and commissioning of electrical devices of the subway, mines and mines, contact networks of electrified transport, signaling systems railway transport, as well as high-security premises nuclear power plants, which must be carried out in accordance with the departmental building codes approved in the manner established by SNiP 1.01.01-82.

The rules must be observed by all organizations and enterprises involved in the design and construction of new, expansion, reconstruction and technical re-equipment of existing enterprises.

1. GENERAL PROVISIONS

1.1. When organizing and performing work on the installation and commissioning of electrical devices, the requirements of SNiP 3.01.01-85, SNiP III-4-80, state standards, technical conditions, the Rules for the installation of electrical installations approved by the USSR Ministry of Energy, and departmental regulatory documents approved by established by SNiP 1.01.01-82.

Acting

d) a project for the production of works has been developed, the engineering and technical workers and foremen have been familiarized with the working documentation and estimates, organizational and technical solutions for the project for the production of works;

e) acceptance was carried out according to the act of the construction part of the object for the installation of electrical devices in accordance with the requirements of these rules and the labor protection measures provided for by the rules and regulations were carried out, fire safety and environmental protection in the course of work;

2.3. Equipment, products, materials and technical documentation should be transferred to installation in accordance with the contracts for capital construction and the relationship of organizations - general contractors with subcontractors.

2.9. Expired electrical equipment standard term storage specified in state standards or technical conditions, is accepted for installation only after pre-installation revision, defect correction and tests. The results of the work carried out must be entered in the forms, passports and other accompanying documentation, or an act of carrying out the indicated work must be drawn up.

2.11. For large and complex objects with a large volume of cable lines in tunnels, canals and cable half-floors, as well as electrical equipment in electrical rooms, the construction organization design should define measures for advanced installation (against the installation of cable networks) of internal fire-fighting water supply systems, automatic fire extinguishing and automatic fire extinguishing systems. alarms provided by the working drawings.

2.12. In electrical rooms (switchboards, control rooms, substations and switchgears, machine rooms, battery rooms, cable tunnels and channels, cable half-floors, etc.), clean floors with drainage channels, the necessary slope and waterproofing and finishing works (plastering and painting ), embedded parts were installed and installation openings were left, the lifting and handling mechanisms and devices provided for by the project were mounted, pipe blocks, holes and openings for the passage of pipes and cables, grooves, niches and nests were prepared in accordance with the architectural and construction drawings and the work production project, power supply for temporary electric lighting in all rooms is made.

Building regulations

Electrical devices SNiP 3.05.06-85

DEVELOPED by VNIIproekt elektromontazh by the USSR Ministry of Montazhspetsstroy

(V.K.Dobrynin, I.N.Dolgov - topic leaders, Candidate of Engineering Sciences V.A. Antonov, A.L. Blinchikov, V.V. Belotserkovets, V.A. Demyantsev, Candidate of Engineering Sciences

N.I. Korotkov, E.A. Panteleev, Candidate of Engineering Sciences Yu.A. Roslov, S.N. Starostin, A.K. Shulzhitsky), Orgenergostroem of the USSR Ministry of Energy (G.N. Elenbogen, N.V. Belanov, N.A. Voinilovich, A.L. Gonchar, N.M. Lerner), Sellenergoproekt of the USSR Ministry of Energy (G.F. Sumin, Yu.V. Nepomnyashchy), UGPI Tyazhpromelektroproekt Minmontazhspetsstroy of the Ukrainian SSR (E.G. Poddubny, A A. Koba).

INTRODUCED by the USSR Ministry of Montazhspetsstroy.

APPROVED by the decree of the USSR State Committee for Construction of December 11, 1985 No. 215

REPLACE SNiP III-33-76 *, SN 85-74, SN 102-76 *.

The rules do not apply to. production and acceptance of works on the installation and commissioning of electrical devices of the subway, mines and mines, contact networks of electrified transport, signaling systems of railway transport, as well as premises of strict regime of nuclear power plants, which must be carried out in accordance with departmental building codes approved in the manner established by SNiP 1.01.0182.

The rules must be observed by all organizations and enterprises involved in the design and construction of new, expansion, reconstruction and technical re-equipment of existing enterprises.

1. GENERAL PROVISIONS

1.1. When organizing and performing work on the installation and commissioning of electrical devices, the requirements of SNiP should be observed 3.01.01-85, SNiP III-4-80, state standards, technical conditions. Of the Rules for the Installation of Electrical Installations, approved by the USSR Ministry of Energy, and departmental normative documents approved in the manner prescribed by SNiP 1.01.01-82.

1.2. Installation and commissioning of electrical devices should be carried out in accordance with the working drawings of the main sets of drawings of electrical brands; on working documentation for electric drives; according to the working documentation of non-standardized equipment, carried out design organization; according to the working documentation of enterprises - manufacturers of technological equipment, supplying power and control cabinets with it.

1.3. Installation of electrical devices should be carried out on the basis of the use of nodal

and complete block construction methods, with the installation of equipment supplied in enlarged units that do not require straightening, cutting, drilling or other adjusting operations and adjustments during installation. When accepting the working documentation for the production of work, it is necessary to check that it takes into account the requirements for the industrialization of the installation of electrical devices, as well as the mechanization of work on laying cables, rigging and installing technological equipment.

1.4. Electrical work should be performed, as a rule, in two stages.

In the first stage, inside buildings and structures, work is carried out on the installation of support structures for the installation of electrical equipment and busbars, for laying cables and wires, installing trolleys for electric bridge cranes, installing steel and plastic pipes for electrical wiring, laying hidden wiring wires before plastering and finishing works, as well as work on the installation of external cable networks and grounding networks. The work of the first stage should be performed in buildings and structures according to the combined schedule simultaneously with the production of the main construction works, while measures should be taken to protect the installed structures and laid pipes from breakages and contamination.

In the second stage, work is performed on the installation of electrical equipment, laying cables and wires, busbars and connecting cables and wires to the terminals of electrical equipment. In the electrical rooms of the objects of the second stage, work should be performed after the completion of the complex of general construction and finishing works and after the completion of the installation of plumbing devices, and in other rooms and zones - after the installation of technological equipment, electric motors and other electrical receivers, installation of technological, sanitary pipelines and ventilation ducts ...

At small objects remote from the locations of electrical installation organizations, work should be carried out by field complex teams with the combination of two stages of their implementation in one.

1.5. Electrical equipment, products and materials should be delivered according to the schedule agreed with the electrical installation organization, which should provide for the priority delivery of materials and products included in the specifications for blocks to be manufactured on assembly and picking enterprises of electrical installation organizations.

1.6. The completion of the installation of electrical devices is the completion of individual tests of the mounted electrical equipment and the signing by the working commission of an act of acceptance of electrical equipment after an individual test. The beginning of individual tests of electrical equipment is the moment of introduction of an operating mode at a given electrical installation, announced by the customer on the basis of a notice from the commissioning and electrical installation organizations.

1.7. At each construction site during the installation of electrical devices, special journals should be kept for the production of electrical work in accordance with SNiP 3.01.01-85, and upon completion of the work, the electrical installation organization is obliged to transfer to the general contractor the documentation presented by the working commission in accordance with SNiP III-3-81. The list of acts and protocols of inspections and tests is determined by the VSN, approved in the established SNiP

1.01.01-82 ok.

2. PREPARATION FOR PRODUCTION OF ELECTRICAL INSTALLATION WORKS

2.1. The installation of electrical devices must be preceded by preparation in accordance with SNiP 3.01.01-85 and these rules.

2.2. Prior to the commencement of work at the facility, the following activities must be performed:

a) the working documentation was received in the quantity and within the timeframe determined by the Rules on construction contracts for capital

construction, approved by the decree of the Council of Ministers of the USSR, and the Regulations on the relationship of organizations, general contractors with subcontractors, approved by the USSR State Construction Committee and the USSR State Planning Committee;

b) the schedules for the supply of equipment, products and materials were agreed, taking into account the technological sequence of work, the list of electrical equipment installed with the involvement of the chief installation personnel of the supplier enterprises, the conditions for transporting heavy and large-sized electrical equipment to the installation site;

c) the necessary premises were taken to accommodate teams of workers, engineering and technical workers, a production base, as well as for storing materials and tools with the provision of labor protection measures, fire safety and environmental protection in accordance with SNiP 3.01.01-85;

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e) the acceptance of the construction part of the object for the installation of electrical devices in accordance with the requirements of these rules has been carried out and the measures for labor protection, fire safety and environmental protection during the work are carried out as provided for by the rules and regulations;

f) performed by the general contractor general construction and auxiliary works stipulated by the Regulations on the relationship of organizations - general contractors with subcontractors.

2.3. Equipment, products, materials and technical documentation must be transferred for installation in accordance with the Rules on Contracts for Capital Construction and the Regulations on the Relationship of Organizations - General Contractors with Subcontractors.

2.4. When the equipment is accepted for installation, it is inspected, the completeness is checked (without disassembly), the availability and validity of guarantees are checked manufacturing enterprises.

2.5. The condition of the cables on the drums should be checked in the presence of the customer by means of an external examination. The results of the inspection are documented in an act.

2.6. When accepting prefabricated reinforced concrete structures of overhead lines (OHL), the following should be checked:

the dimensions of the elements, the position of the steel embedded parts, as well as the quality of the surfaces and appearance elements. The specified parameters must comply with GOST 13015.0-83, GOST

22687.0-85, GOST 24762-81, GOST 26071-84, GOST 23613-79, as well as PUE;

the presence on the surface of reinforced concrete structures intended for installation in an aggressive environment, waterproofing made at the manufacturer.

2.7. Insulators and line fittings must meet the requirements of the relevant state standards and specifications. When accepting them, you should check:

availability of a manufacturer's passport for each batch of insulators and linear fittings, certifying their quality;

the absence of cracks, deformations, cavities, chips, damage to the glaze on the surface of the insulators, as well as swaying and turning of the steel reinforcement relative to the cement embedding or porcelain;

the absence of cracks, deformations, cavities and damage to galvanized steel and threads in linear reinforcement.

It is allowed to paint over minor damages of galvanized steel.

2.8. Elimination of defects and damages discovered during the transfer of electrical equipment is carried out in accordance with the Rules on Contracts for Capital Construction.

2.9. Electrical equipment, for which the standard storage period specified in state standards or technical conditions has expired, is accepted for installation only after a pre-installation audit, correction of defects and tests. The results of the work carried out must be entered in the forms, passports and other accompanying documentation, or an act of carrying out the indicated work must be drawn up.

2.10. Electrical equipment, products and materials accepted for installation should be stored in accordance with the requirements of state standards or technical specifications.

2.11. For large and complex objects with a large volume of cable lines in tunnels, channels

and of cable semi-floors, as well as electrical equipment in electrical rooms in the construction organization project, measures for advanced installation (against the installation of cable networks) of internal fire-fighting water supply systems, automatic fire extinguishing and automatic fire alarm systems, provided for by the working drawings, should be determined.

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the passage of pipes and cables, furrows, niches and nests, a power supply for temporary electric lighting in all rooms is made.

2.13. In buildings and structures, heating and ventilation systems must be put into operation, bridges, platforms and structures of suspended ceilings provided by the project for the installation and maintenance of electric lighting installations located at a height, as well as fixing structures for multi-lamp lamps (chandeliers) weighing over 100 kg; laid outside and inside buildings and structures asbestos-cement pipes and pipes and pipe blocks for the passage of cables provided for by the working construction drawings.

2.14. Foundations for electrical machines should be handed over for installation with fully completed construction and finishing works, installed air coolers and ventilation ducts, with benchmarks and axial strips (measurements) in accordance with the requirements of SNiP 3.02.01-83 and these rules.

2.15. On the supporting (rough) surfaces of foundations, depressions of no more than 10 mm and slopes up to 1: 100 are allowed. Deviations in building dimensions should be no more than: in terms of axial dimensions in the plan - plus 30 mm, in elevation marks of the surface of the foundations (excluding the height of the grout) - minus 30 mm, in terms of the dimensions of the ledges in the plan - minus 20 mm, in terms of the dimensions of wells - plus 20 mm, along the marks of the ledges in the recesses and wells - minus 20 mm, along the axes of the anchor bolts in the plan - ± 5 mm, along the axes of the embedded anchor devices in the plan - ± 10 mm, along the marks of the upper ends of the anchor bolts - ± 20 mm.

2.16. Delivery and acceptance of foundations for the installation of electrical equipment, the installation of which is carried out with the involvement of the installation supervision personnel, is carried out jointly with representatives of the organization that carries out installation supervision.

2.17. At the end of the finishing work in the battery rooms, acid or alkali-resistant coatings of walls, ceilings and floors should be made, heating, ventilation, water supply and sewerage systems installed and tested.

2.18. Before the start of electrical work on open switchgears with a voltage of 35 kV and above, the construction organization must complete the construction of access roads, approaches and entrances, install bus and linear portals, build foundations for electrical equipment, cable channels with ceilings, fences around the switchgear, emergency discharge tanks oils, underground utilities and the planning of the territory is completed. In the structures of portals and foundations for the equipment, the embedded parts and fasteners provided for by the project must be installed, which are necessary for fastening the garlands of insulators and equipment. In cable ducts and tunnels, embedded parts must be installed for fastening cable structures and air ducts. The construction of a water supply system and other fire-prevention devices provided for by the project must also be completed.

2.19. Construction part of outdoor switchgear and voltage substations 330-750 kV should be accepted for installation for their full development, provided for by the project for the billing period.

2.20. Before the start of electrical work on the construction of overhead power lines with a voltage of up to 1000 V and above, preparatory work must be performed in accordance with SNiP

3.01.01-85, including:

Inventory structures were prepared at the locations of foreman's plots and temporary bases for storing materials and equipment; temporary access roads, bridges and assembly sites were built;

glades are arranged; the demolition of buildings and reconstruction of the intersected

engineering structures located on or near the overhead line route and interfering with the production of work.

2.21. The routes for laying the cable in the ground must be prepared for the beginning of its laying in the following volume: water is pumped out of the trench and stones, clods of earth, construction waste are removed; at the bottom of the trench there is a cushion of loosened earth; punctures were made in the ground at the intersection of the route with roads and other engineering structures, pipes were laid.

After laying the cables in the trench and the submission by the electrical installation organization of the act for the hidden work on laying the cables, the trench should be filled up.

2.22. Block sewerage routes for cable laying must be prepared taking into account the following requirements:

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the design depth of the blocks was maintained from the planning level; the correct laying and waterproofing of the joints of reinforced concrete blocks and pipes are ensured; ensured the cleanliness and alignment of the channels;

there are double covers (the lower one with a lock) of the manholes of the wells, metal ladders or brackets for lowering into the well.

2.23. When constructing ramps for laying cables on their supporting structures (columns) and on spans, the embedded elements provided for by the project must be made for installing cable rollers, bypass devices and other devices.

2.24. The general contractor must present for acceptance for installation the construction readiness in residential buildings - by section, in public buildings - by floor (or by premises).

Reinforced concrete, gypsum concrete, expanded clay concrete floor panels, internal wall panels and partitions, reinforced concrete columns and prefabricated crossbars must have channels (pipes) for laying wires, niches, nests with embedded parts for installing plug sockets, switches, bells and bell buttons in accordance with working drawings. Cross-sections of channels and monolithic non-metallic pipes should not differ by more than 15% from those indicated in the working drawings.

The displacement of nests and niches at the junctions of adjacent building structures should not be more than 40 mm.

2.25. In buildings and structures handed over for the installation of electrical equipment, the general contractor must fulfill the stipulated architectural and construction drawings of holes, grooves, niches and nests in foundations, walls, partitions, ceilings and coverings, necessary for the installation of electrical equipment and installation products, laying pipes for electrical wiring and electrical networks.

The indicated holes, grooves, niches and nests, which were not left in the building structures during their erection, are carried out by the general contractor in accordance with the architectural and construction drawings.

Holes with a diameter of less than 30 mm that cannot be taken into account in the development of drawings and which cannot be provided for in building structures according to the conditions of their manufacturing technology (holes in walls, partitions, ceilings only for installing dowels, pins and pins of various supporting and supporting structures) must carried out by the electrical installation organization at the place of work.

After completing the electrical work, the general contractor is obliged to seal the holes, grooves, niches and nests.

2.26. When accepting foundations for transformers, the presence and correctness of installation of anchors for fastening traction devices during rolling of transformers and foundations for jacks for turning rollers must be checked.

3. PRODUCTION OF ELECTRICAL WORKS GENERAL REQUIREMENTS

3.1. When loading, unloading, moving, lifting and installing electrical equipment, measures must be taken to protect it from damage, while heavy electrical equipment must be securely slinged to the parts provided for this purpose or in the places specified by the manufacturer.

3.2. Electrical equipment during installation is not subject to disassembly and revision, except in cases where it is provided by state and industry standards or technical conditions, agreed in accordance with the established procedure.

Disassembly of equipment received sealed from the manufacturer is prohibited.

3.3. Electrical equipment and cable products that are deformed or with damage to the protective coatings are not subject to installation until the damage and defects are eliminated in the prescribed manner.

3.4. In the production of electrical work, standard sets of special tools should be used for the types of electrical work, as well as mechanisms and devices designed for this purpose.

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3.5. As supporting structures and fasteners for the installation of trolleys, busbars, trays, boxes, hinged panels and control posts, of protective and starting equipment and lamps, factory-made products should be used that have increased assembly readiness (with a protective coating, adapted for fastening without welding and do not require large labor costs for machining).

Fastening of supporting structures should be carried out by welding to embedded parts provided in building elements, or by fasteners (dowels, pins, pins, etc.). The method of fastening must be indicated in the working drawings.

3.6. The color designation of current-carrying buses of switchgears, trolleys, grounding buses, overhead lines should be performed in accordance with the instructions given in the project.

3.7. During the performance of work, the electrical installation organization must comply with the requirements of GOST 12.1.004-76 and the Fire Safety Rules during construction and installation works. When the operational regime is introduced at the facility, ensuring fire safety is the responsibility of the customer.

CONTACT CONNECTIONS

3.8. Collapsible connections of tires and cores of wires and cables to the contact terminals of electrical equipment, installation products and bus ducts must meet the requirements of GOST 10434-82.

3.9. In the places where the conductors of wires and cables are connected, a supply of wire or cable should be provided to ensure the possibility of re-connection.

3.10. The joints and branches must be accessible for inspection and repair. The insulation of connections and branches should be equivalent to the insulation of the cores of the wires and cables to be connected.

At the points of connections and branches, wires and cables should not be subjected to mechanical stress.

3.11. The termination of the cable core with impregnated paper insulation should be performed with sealed current-carrying fittings (lugs), which do not allow the cable impregnating compound to leak out.

3.12. Busbar connections and branches should be made, as a rule, non-separable (by welding).

In places where collapsible joints are required, busbar connections should be made with bolts or pressure plates. The number of collapsible joints should be minimal.

3.13. Connections of wires of overhead lines with voltage up to 20 kV should be performed:

a) in the loops of the anchor-angle type supports: with clamps - anchor and branch wedge; connecting oval, mounted by the crimp method; looped dies, with the help of thermite cartridges, and wires of different brands and sections - with hardware pressed clamps;

b) in the spans: connecting oval clamps, mounted by twisting. Single-wire wires are allowed to be connected by twisting. Butt Welding Single Wire

no wires allowed.

3.14. The connection of overhead lines with a voltage higher than 20 kV must be performed: a) in the loops of anchor-angle type supports:

steel aluminum wires with a section of 240 sq. mm and above - with the help of thermite cartridges and pressure testing with the help of explosion energy;

steel-aluminum wires with a cross-section of 500 sq. mm and above - using crimp connectors; wires of different brands - with bolt clamps; wires made of aluminum alloy - with loop-type clamps or connectors

oval, crimp-mounted; b) in the spans:

steel-aluminum wires with a cross-section up to 185 sq. mm and steel ropes with a cross-section up to 50 sq. mm - oval connectors, mounted by twisting;

steel ropes with a cross section of 70-95 sq. mm with oval connectors, mounted by crimping or crimping with additional thermite welding of the ends;

steel-aluminum wires with a cross-section of 240-400 sq. mm with connecting clamps, mounted by continuous crimping and crimping using explosion energy;

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steel-aluminum wires with a cross section of 500 sq. mm and more - with connecting clamps, mounted by the method of continuous crimping.

3.15. The connection of copper and steel-copper ropes with a cross-section of 35-120 sq. Mm, as well as aluminum wires with a cross-section of 120-185 sq. Mm during the installation of contact networks should be performed with oval connectors, steel ropes - with clamps with a connecting strip between them. Steel-copper ropes with a cross section of 50-95 sq. Mm are allowed to be joined with wedge clamps with a connecting bar between them.

ELECTRICAL WIRING General requirements

3.16. The rules of this subsection apply to the installation of electrical wiring for power, lighting and secondary circuits with voltages up to 1000 V AC and DC, laid inside and outside buildings and structures with insulated installation wires of all sections and unarmored cables with rubber or plastic insulation with a cross section of up to 16 sq. mm.

3.17. Installation of control cables should be carried out taking into account the requirements of paragraphs. 3.56-3.106.

3.18. Passages of non-armored cables, protected and unprotected wires through fireproof walls (partitions) and interfloor ceilings must be made in pipe sections, or in boxes, or openings, and through combustible ones - in steel pipe sections.

Openings in walls and ceilings must have a frame that excludes their destruction during operation. In places where wires and cables pass through walls, ceilings or their exit to the outside, gaps between wires, cables and a pipe (box, opening) should be sealed with an easily removable mass from a non-combustible material.

Sealing should be done on each side of the pipe (duct, etc.).

In the case of open laying of non-metallic pipes, the sealing of the places of their passage through fire barriers should be made with non-combustible materials immediately after laying the cables or wires into the pipes.

Sealing the gaps between pipes (box, opening) and the building structure (see clause 2.25), as well as between wires and cables laid in pipes (boxes, openings), with an easily removable mass from a non-combustible material should provide fire resistance corresponding to the fire resistance of the building structure ...

Laying wires and cables on trays and boxes

3.19. The design and degree of protection of trays and boxes, as well as the method of laying wires and cables on trays and in boxes (in bulk, bundles, multilayer, etc.) must be specified in the project.

3.20. The way the boxes are installed should not allow moisture to accumulate in them. The boxes used for open electrical wiring should have, as a rule, removable or opening covers.

3.21. For hidden gaskets, blind ducts should be used.

3.22. Wires and cables laid in boxes and on trays must be marked at the beginning and at the end of trays and boxes, as well as at the points of their connection to electrical equipment, and cables, in addition, also on the turns of the track and on branches.

3.23. Fasteners of unprotected wires and cables with a metal sheath with metal brackets or bands must be made with gaskets made of elastic insulating materials.

Laying wires on insulating supports

3.24. When laying on insulating supports, the connection or branching of the wires should be carried out directly at the insulator, clip, roller or on them.

3.25. The distances between the attachment points along the route and between the axes of parallel laid unprotected insulated wires on insulating supports should be indicated in the project.

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3.26. Hooks and brackets with insulators should be fixed only in the main material of the walls, and rollers and clamps for wires with a cross section of up to 4 mm2 incl. can be fixed to plaster or cladding of wooden buildings. Hook insulators must be securely fastened.

3.27. When fastening the rollers with wood grouses, metal and elastic washers should be placed under the heads of the wood grouses, and when fastening the rollers on metal, elastic washers should be placed under their bases.

Laying wires and cables on a steel rope

3.28. Wires and cables (in polyvinyl chloride, nitrite, lead or aluminum sheaths with rubber or polyvinyl chloride insulation) must be fixed to the supporting steel rope or to the wire with bandages or clamps installed at distances of no more than 0.5 m from each other.

3.29. Cables and wires laid on the ropes, at the points of their transition from the rope to the structures of buildings, must be unloaded from mechanical forces.

Vertical suspensions of the wiring on a steel rope should be located, as a rule, in the places where branch boxes, plug connectors, lamps, etc. are installed. The sag arrow of the rope in the spans between the fasteners should be within 1/40 - 1/60 of the span length. Splicing of ropes in the span between end fixtures is not allowed.

3.30. Guy braces should be installed on the wire rope to prevent the lighting wiring from swaying. The number of stretch marks should be determined in the working drawings.

3.31. For branches from special cable wires, special boxes must be used to create a cable loop, as well as a supply of cores necessary to connect an outgoing line using branch clamps without cutting the line.

Laying installation wires on building foundations

and inside the main building structures

3.32. Open and hidden laying of installation wires is not allowed at temperatures below minus 15 ° C.

3.33. In case of hidden laying of wires under a layer of plaster or in thin-walled (up to 80 mm) partitions, wires must be laid in parallel architectural and construction lines. The distance of horizontally laid wires from floor slabs should not exceed 150 mm.

V building structures with a thickness of more than 80 mm, wires should be laid along the shortest routes.

3.34. All connections and branches of the installation wires must be made by welding, crimping in sleeves or using clamps in branch boxes.

Metal junction boxes in the places where wires are inserted into them must have bushings made of insulating materials. It is allowed to use pieces of PVC tube instead of bushings. In dry rooms, it is allowed to place branches of wires in the nests and niches of walls and floors, as well as in the voids of the floors. The walls of the nests and niches should be smooth, the branches of the wires located in the nests and niches should be covered with covers made of non-combustible material.

3.35. Fastening of flat wires with hidden laying should ensure their snug fit to the building foundations. In this case, the distances between the attachment points should be:

a) when laying on horizontal and vertical sections of plastering wire bundles - no more than 0.5 m; single wires -0.9 m;

b) when covering wires with dry plaster - up to 1.2 m.

3.36. The plinth wiring device must provide separate routing of power and low-current wires.

3.37. The fixing of the plinth should ensure its tight fit to the building bases, while the pull-off force should be at least 190 N, and the gap between the plinth, wall and floor should be no more than 2 mm. Skirting boards should be made of non-combustible and non-combustible materials with electrical insulating properties.

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3.38. In accordance with GOST 12504-80, GOST 12767-80 and GOST 9574-80 in the panels must be provided with internal channels or embedded plastic pipes and embedded elements for hidden replaceable electrical wiring, sockets and holes for installing junction boxes, switches and sockets.

Holes for wiring accessories and broaching niches in wall panels adjacent apartments should not be cross-cutting. If, according to the conditions of the manufacturing technology, it is not possible to make holes blind, then sound-insulating gaskets made of vinyl foam or other non-combustible sound-insulating material must be laid in them.

3.39. The installation of pipes and boxes in reinforcing cages should be carried out on the conductors according to the working drawings that determine the attachment points for the installation, branch and ceiling boxes. To ensure that the boxes are positioned flush with the surface of the panels after molding, they should be fixed to the reinforcing cage in such a way that when the boxes are installed in blocks, the height of the block corresponds to the thickness of the panel, and when the boxes are installed separately to prevent their displacement inside the panels, the front surface of the boxes should protrude beyond the plane of the reinforcing cage. on the 30-35 mm.

3.40. The channels should have a smooth surface along their entire length, without sagging and sharp corners. The thickness of the protective layer above the channel (pipe) must be at least 10 mm.

The length of channels between broaching niches or boxes should be no more than 8 m.

Laying wires and cables in steel pipes

3.41. Steel pipes are allowed to be used for electrical wiring only in cases specially justified in the project in accordance with the requirements of regulatory documents approved in the manner established by SNiP 1.01.01-82.

3.42. Steel pipes used for electrical wiring must have an inner surface that excludes damage to the insulation of the wires when they are pulled into the pipe and an anti-corrosion coating of the outer surface. For pipes embedded in building structures, an external anti-corrosion coating is not required. Pipes laid in rooms with a chemically active environment, inside and outside, must have an anti-corrosion coating that is resistant to the conditions of this environment. In places where wires exit from steel pipes, insulating sleeves should be installed.

3.43. Steel pipes for electrical wiring, laid in the foundations for technological equipment, must be fixed to supporting structures or to reinforcement before concreting the foundations. In places where pipes exit from the foundation into the ground, the measures provided for in the working drawings must be carried out against the shearing of the pipes in case of sedimentation of the ground or foundation.

3.44. In the places where the pipes intersect the expansion and sedimentary joints, compensating devices must be made in accordance with the instructions in the working drawings.

3.45. The distances between the attachment points of openly laid steel pipes should not exceed the values indicated in table. 1. Fastening steel wiring pipes directly

To technological pipelines, as well as their welding directly to various structures are not allowed.

Table 1

	The greatest		The greatest
Conditional	admissible	Conditional	admissible
pipe passage,	distance	pipe passage, mm	distance
	between points		between points
	fastening, m		fastening, m

Electrical Library / www.elec.ru

3.46. When bending pipes, as a rule, normalized angles of rotation of 90, 120 should be used.

and 135 ° and normalized bending radii of 400, 800 and 1000 mm. A bending radius of 400 mm should be used for pipes laid in ceilings and for vertical outlets; 800 and 1000 mm - when laying pipes in monolithic foundations and when laying cables with single-wire conductors in them. When preparing packages and blocks of pipes, you should also adhere to the specified normalized angles and bending radii.

3.47. When laying wires in vertically laid pipes (risers), their fastening should be provided, and the fastening points should be spaced from each other at a distance not exceeding, m:

for wires up to 50 sq. mm incl. ................... thirty

the same, from 70 to 150 sq. mm incl. .................. twenty

" "185" 240 sq. Mm "....................... 15

Fastening of wires should be carried out using clamps or clamps in broaching or branch boxes or at the ends of pipes.

3.48. Pipes with hidden laying in the floor must be buried at least 20 mm and protected with a layer of cement mortar. It is allowed to install branch and pull-out boxes in the floor, for example, for modular wiring.

3.49. Distances between broaching boxes (boxes) should not exceed, m: on straight sections 75, with one pipe bend - 50, with two - 40, with three-20.

Wires and cables in pipes must lie freely, without tension. The diameter of the pipes should be taken in accordance with the instructions in the working drawings.

Laying wires and cables in non-metallic pipes

3.50. The laying of non-metallic (plastic) pipes for tightening wires and cables in them must be carried out in accordance with the working drawings at an air temperature of at least minus 20 and no higher than plus 60 ° C.

V on foundations, plastic pipes (usually polyethylene) should be laid only on horizontally compacted soil or a layer of concrete.

V foundations up to 2 m deep, PVC pipes can be laid. In this case, measures must be taken against mechanical damage during concreting and backfilling of soil.

3.51. The fastening of openly laid non-metallic pipes must allow their free movement (movable fastening) during linear expansion or contraction from changes in the ambient temperature. The distances between the points of installation of movable mounts must correspond to those indicated in table. 2.

table 2

	Distances		Distances
Outer	between points	Outer	between points
pipe diameter,	fastening at	pipe diameter,	fastening at
	horizontal and		horizontal
	vertical		and vertical
	gasket, mm		gasket, mm

3.52. The thickness of the concrete solution above the pipes (single and blocks) when they are embedded

v floor preparations should be at least 20 mm. At the intersection of pipe routes, a protective layer of concrete mortar between the pipes is not required. In this case, the depth of the top row must comply with the above requirements. If when crossing pipes it is impossible

Electrical Library / www.elec.ru

SNiP 3.05.06-85

BUILDING REGULATIONS

Electrical devices

Date of introduction 1986-01-07

DEVELOPED by VNIIproektelektromontazh by the USSR Ministry of Montazhspetsstroy (V.K. Dobrynin, I.N. Dolgov - leaders

topics, Candidate of Engineering Sciences V.A. Antonov, A.L. Blinchikov, V.V. Belotserkovets, V.A. Demyantsev, Candidate of Technical Sciences N.I. Korotkov, E.A. technical sciences Yu.A. Roslov, S.N. Starostin, A.K. Shulzhitskiy), Orgenergostroy of the USSR Ministry of Energy (G.N. Elenbogen, N.V. Belanov, N.A. Voinilovich, A.L. Gonchar, N.M. Lerner), Sellenergoproekt of the USSR Ministry of Energy (G.F. Sumin, Yu.V. Nepomnyashchy), UGPI Tyazhpromelektroproekt Minmontazhspetsstroy of the Ukrainian SSR (E.G. Poddubny, A.A. Koba).

INTRODUCED by the USSR Ministry of Montazhspetsstroy.

APPROVED by the decree of the USSR State Committee for Construction of December 11, 1985 No. 215

REPLACE SNiP III-33-76 *, SN 85-74, SN 102-76 *.

The rules do not apply to. production and acceptance of works on the installation and commissioning of electrical devices of the subway, mines and mines, contact networks of electrified transport, signaling systems for railway transport, as well as rooms with a strict regime of nuclear power plants, which must be carried out in accordance with departmental building codes approved in the manner prescribed by SNiP 1.01.01-82.

The rules must be observed by all organizations and enterprises involved in the design and construction of new, expansion, reconstruction and technical re-equipment of existing enterprises.

1. GENERAL PROVISIONS

1.1. When organizing and performing work on the installation and commissioning of electrical devices, the requirements of SNiP 3.01.01-85, SNiP III-4-80, state standards, technical conditions should be observed. Of the Rules for the Installation of Electrical Installations, approved by the USSR Ministry of Energy, and departmental regulatory documents approved in the manner established by SNiP 1.01.01-82.

1.2. Installation and commissioning of electrical devices should be carried out in accordance with the working drawings of the main sets of drawings of electrical brands; on working documentation for electric drives; according to the working documentation for non-standardized equipment, prepared by the design organization; according to the working documentation of enterprises - manufacturers of technological equipment, supplying power and control cabinets with it.

1.3. The installation of electrical devices should be carried out on the basis of the use of nodal and complete-block construction methods, with the installation of equipment supplied by enlarged units that do not require straightening, cutting, drilling or other adjusting operations and adjustments during installation. When accepting the working documentation for the production of work, it is necessary to check that it takes into account the requirements for the industrialization of the installation of electrical devices, as well as the mechanization of work on laying cables, rigging and installing technological equipment.

1.4. Electrical work should be performed, as a rule, in two stages.

In the first stage, inside buildings and structures, work is carried out on the installation of support structures for the installation of electrical equipment and busbars, for laying cables and wires, installing trolleys for electric bridge cranes, installing steel and plastic pipes for electrical wiring, laying hidden wiring wires before plastering and finishing works, as well as work on the installation of external cable networks and grounding networks. The work of the first stage should be carried out in buildings and structures according to a combined schedule simultaneously with the main construction work, while measures should be taken to protect the installed structures and laid pipes from breakdowns and contamination.

In the second stage, work is performed on the installation of electrical equipment, laying cables and wires, busbars and connecting cables and wires to the terminals of electrical equipment. In the electrical rooms of the objects of the second stage, work should be carried out after the completion of the complex of general construction and finishing works and after the completion of the installation of plumbing devices, and in other rooms and zones - after the installation of technological equipment, electric motors and other electrical receivers, installation of technological, sanitary-technical pipelines and ventilation ducts.

1.5. Electrical equipment, products and materials should be supplied according to a schedule agreed with the electrical installation organization, which should provide for the priority delivery of materials and products included in the specifications for blocks to be manufactured at the assembly and packaging enterprises of electrical installation organizations.

1.7. At each construction site, during the installation of electrical devices, special journals of electrical installation work should be kept in accordance with SNiP 3.01.01-85, and upon completion of the work, the electrical installation organization is obliged to transfer to the general contractor the documentation presented by the working commission in accordance with SNiP III-3-81. The list of acts and protocols of inspections and tests is determined by the VSN, approved in accordance with the procedure established by SNiP 1.01.01-82.

2. PREPARATION FOR PRODUCTION

ELECTRICAL WORKS

2.1. The installation of electrical devices must be preceded by preparation in accordance with SNiP 3.01.01-85 and these rules.

2.2. Prior to the commencement of work at the facility, the following activities must be performed:

a) the working documentation was received in the quantity and within the timeframe determined by the Rules on Contracts for Capital Construction, approved by the resolution of the Council of Ministers of the USSR, and the Regulation on the relationship of organizations, general contractors with subcontractors, approved by the USSR State Construction Committee and the USSR State Planning Committee;

c) the necessary premises have been taken to accommodate teams of workers, engineering and technical workers, a production base, as well as for storing materials and tools with the provision of measures for labor protection, fire safety and environmental protection in accordance with SNiP 3.01.01-85;

f) performed by the general contractor general construction and auxiliary works stipulated by the Regulations on the relationship of organizations - general contractors with subcontractors.

2.4. When the equipment is accepted for installation, it is inspected, the completeness is checked (without disassembly), the availability and validity of the manufacturer's warranties are checked.

2.5. The condition of the cables on the drums should be checked in the presence of the customer by means of an external examination. The results of the inspection are documented in an act.

2.6. When accepting prefabricated reinforced concrete structures of overhead lines (OHL), the following should be checked:

the dimensions of the elements, the position of the steel embedded parts, as well as the quality of the surfaces and the appearance of the elements. The specified parameters must comply with GOST 13015.0-83, GOST 22687.0-85, GOST 24762-81, GOST 26071-84, GOST 23613-79, as well as PUE;

the presence on the surface of reinforced concrete structures intended for installation in an aggressive environment, waterproofing made at the manufacturer.

2.7. Insulators and line fittings must meet the requirements of the relevant state standards and specifications. When accepting them, you should check:

availability of a manufacturer's passport for each batch of insulators and linear fittings, certifying their quality;

the absence of cracks, deformations, cavities and damage to galvanized steel and threads in linear reinforcement.

It is allowed to paint over minor damages of galvanized steel.

2.8. Elimination of defects and damages discovered during the transfer of electrical equipment is carried out in accordance with the Rules on Contracts for Capital Construction.

2.10. Electrical equipment, products and materials accepted for installation should be stored in accordance with the requirements of state standards or technical specifications.

2.17. At the end of the finishing work in the battery rooms, acid- or alkali-resistant coatings of walls, ceilings and floors must be made, heating, ventilation, water supply and sewerage systems must be installed and tested.

2.19. The construction part of the outdoor switchgear and substations with a voltage of 330-750 kV should be accepted for installation for their full development, provided for by the project for the billing period.

2.20. Before the start of electrical work on the construction of overhead power lines with voltages up to 1000 V and above, preparatory work must be performed in accordance with SNiP 3.01.01-85, including:

Inventory structures were prepared at the locations of foreman's plots and temporary bases for storing materials and equipment; temporary access roads, bridges and assembly sites were built;

glades are arranged;

the demolition of buildings envisaged by the project and the reconstruction of intersected engineering structures located on or near the overhead line route and hindering the production of work were carried out.

After laying the cables in the trench and the submission by the electrical installation organization of the act for the hidden work on laying the cables, the trench should be filled up.

2.22. Block sewerage routes for cable laying must be prepared taking into account the following requirements:

the design depth of the blocks was maintained from the planning level;

the correct laying and waterproofing of the joints of reinforced concrete blocks and pipes are ensured;

ensured the cleanliness and alignment of the channels;

there are double covers (the lower one with a lock) of the manholes of the wells, metal ladders or brackets for lowering into the well.

2.24. The general contractor must present for acceptance for installation the construction readiness in residential buildings - by section, in public buildings - by floor (or by premises).

The displacement of nests and niches at the junctions of adjacent building structures should not be more than 40 mm.

2.25. In buildings and structures handed over for the installation of electrical equipment, the general contractor must make holes, grooves, niches and nests in the foundations, walls, partitions, ceilings and coatings provided for by the architectural and construction drawings, which are necessary for the installation of electrical equipment and installation products, laying pipes for electrical wiring and electrical networks.

After completing the electrical work, the general contractor is obliged to seal the holes, grooves, niches and nests.

3. PRODUCTION OF ELECTRICAL INSTALLATION WORKS

GENERAL REQUIREMENTS

3.2. Electrical equipment during installation is not subject to disassembly and revision, except for cases when it is provided for by state and industry standards or technical conditions agreed in the prescribed manner.

Disassembly of equipment received sealed from the manufacturer is prohibited.

3.4. In the production of electrical work, standard sets of special tools should be used for the types of electrical work, as well as mechanisms and devices designed for this purpose.

3.5. As supporting structures and fasteners for the installation of trolleys, bus ducts, trays, boxes, hinged shields and control posts, protective and starting equipment and lamps, factory-made products should be used that have increased assembly readiness (with a protective coating, adapted for fastening without welding and not requiring large labor costs for machining).

3.6. The color designation of current-carrying buses of switchgears, trolleys, grounding buses, overhead lines should be performed in accordance with the instructions given in the project.

3.7. During the performance of work, the electrical installation organization must comply with the requirements of GOST 12.1.004-76 and the Fire Safety Rules in the performance of construction and installation works. When the operational regime is introduced at the facility, ensuring fire safety is the responsibility of the customer.

CONTACT CONNECTIONS

3.8. Collapsible connections of buses and cores of wires and cables to contact terminals of electrical equipment, installation products and bus ducts must meet the requirements of GOST 10434-82.

3.9. In the places where the conductors of wires and cables are connected, a supply of wire or cable should be provided to ensure the possibility of re-connection.

At the points of connections and branches, wires and cables should not be subjected to mechanical stress.

3.12. Busbar connections and branches should be made, as a rule, non-separable (by welding).

In places where collapsible joints are required, busbar connections should be made with bolts or pressure plates. The number of collapsible joints should be minimal.

3.13. Connections of wires of overhead lines with voltage up to 20 kV should be performed:

b) in the spans: connecting oval clamps, mounted by twisting.

Single-wire wires are allowed to be connected by twisting. Butt welding of solid wires is not allowed.

3.14. The connection of overhead lines with a voltage higher than 20 kV must be performed:

a) in the loops of the anchor-angle type supports:

steel-aluminum wires with a cross-section of 240 sq. mm and above - with the help of thermite cartridges and crimping with the help of explosion energy;

steel-aluminum wires with a cross-section of 500 sq. mm and above - using crimp connectors;

wires of different brands - with bolt clamps;

wires made of aluminum alloy - with loop-type clamps or oval connectors, mounted by the crimping method;

b) in the spans:

steel-aluminum wires with a cross-section up to 185 sq. mm and steel ropes with a cross-section up to 50 sq. mm - oval connectors, mounted by twisting;

steel ropes with a cross section of 70-95 sq. mm with oval connectors, mounted by crimping or crimping with additional thermite welding of the ends;

steel-aluminum wires with a cross-section of 240-400 sq. mm with connecting clamps, mounted by continuous crimping and crimping using explosion energy;

steel-aluminum wires with a cross section of 500 sq. mm and more - with connecting clamps, mounted by the method of continuous crimping.

ELECTRICAL WIRING

General requirements

3.17. Installation of control cables should be carried out taking into account the requirements of paragraphs. 3.56-3.106.

Sealing should be done on each side of the pipe (duct, etc.).

Laying wires and cables on trays and boxes

3.20. The way the boxes are installed should not allow moisture to accumulate in them. The boxes used for open electrical wiring should have, as a rule, removable or opening covers.

3.21. For hidden gaskets, blind ducts should be used.

3.23. Fasteners of unprotected wires and cables with a metal sheath with metal brackets or bands must be made with gaskets made of elastic insulating materials.

Laying wires on insulating supports

3.24. When laying on insulating supports, the connection or branching of the wires should be carried out directly at the insulator, clip, roller or on them.

3.25. The distances between the attachment points along the route and between the axes of parallel laid unprotected insulated wires on insulating supports should be indicated in the project.

Laying wires and cables on a steel rope

3.29. Cables and wires laid on the ropes, at the points of their transition from the rope to the structures of buildings, must be unloaded from mechanical forces.

3.30. Guy braces should be installed on the wire rope to prevent the lighting wiring from swaying. The number of stretch marks should be determined in the working drawings.

Laying installation wires on building foundations

and inside the main building structures

3.32. Open and hidden laying of installation wires is not allowed at temperatures below minus 15 ° C.

3.33. With hidden laying of wires under a layer of plaster or in thin-walled (up to 80 mm) partitions, wires should be laid parallel to the architectural and construction lines. The distance of horizontally laid wires from floor slabs should not exceed 150 mm. In building structures with a thickness of more than 80 mm, wires must be laid along the shortest routes.

3.34. All connections and branches of the installation wires must be made by welding, crimping in sleeves or using clamps in branch boxes.

3.35. Fastening of flat wires with hidden laying should ensure their snug fit to the building foundations. In this case, the distances between the attachment points should be:

a) when laying on horizontal and vertical sections of plastering wire bundles - no more than 0.5 m; single wires -0.9 m;

b) when covering wires with dry plaster - up to 1.2 m.

SNiP 3.05.06-85

BUILDING REGULATIONS

Electrical devices

Date of introduction 1986-01-07

DEVELOPED by VNIIproektelektromontazh by the USSR Ministry of Montazhspetsstroy (V.K. Dobrynin, I.N. Dolgov - leaders

INTRODUCED by the USSR Ministry of Montazhspetsstroy.

APPROVED by the decree of the USSR State Committee for Construction of December 11, 1985 No. 215

REPLACE SNiP III-33-76 *, SN 85-74, SN 102-76 *.

The rules do not apply to. production and acceptance of works on the installation and commissioning of electrical devices of the subway, mines and mines, contact networks of electrified transport, signaling systems for railway transport, as well as rooms with a strict regime of nuclear power plants, which must be carried out in accordance with departmental building codes approved in the manner prescribed by SNiP 1.01.01-82.

The rules must be observed by all organizations and enterprises involved in the design and construction of new, expansion, reconstruction and technical re-equipment of existing enterprises.

1. GENERAL PROVISIONS

1.1. When organizing and performing work on the installation and commissioning of electrical devices, the requirements of SNiP 3.01.01-85, SNiP III-4-80, state standards, technical conditions should be observed. Of the Rules for the Installation of Electrical Installations, approved by the USSR Ministry of Energy, and departmental regulatory documents approved in the manner established by SNiP 1.01.01-82.

1.2. Installation and commissioning of electrical devices should be carried out in accordance with the working drawings of the main sets of drawings of electrical brands; on working documentation for electric drives; according to the working documentation for non-standardized equipment, prepared by the design organization; according to the working documentation of enterprises - manufacturers of technological equipment, supplying power and control cabinets with it.

1.4. Electrical work should be performed, as a rule, in two stages.

In the first stage, inside buildings and structures, work is carried out on the installation of support structures for the installation of electrical equipment and busbars, for laying cables and wires, installing trolleys for electric bridge cranes, installing steel and plastic pipes for electrical wiring, laying hidden wiring wires before plastering and finishing works, as well as work on the installation of external cable networks and grounding networks. The work of the first stage should be carried out in buildings and structures according to a combined schedule simultaneously with the main construction work, while measures should be taken to protect the installed structures and laid pipes from breakdowns and contamination.

In the second stage, work is performed on the installation of electrical equipment, laying cables and wires, busbars and connecting cables and wires to the terminals of electrical equipment. In the electrical rooms of the objects of the second stage, work should be carried out after the completion of the complex of general construction and finishing works and after the completion of the installation of plumbing devices, and in other rooms and zones - after the installation of technological equipment, electric motors and other electrical receivers, installation of technological, sanitary-technical pipelines and ventilation ducts.

1.7. At each construction site, during the installation of electrical devices, special journals of the production of electrical work should be kept in accordance with SNiP 3.01.01-85, and upon completion of the work, the electrical installation organization is obliged to transfer to the general contractor the documentation presented by the working commission in accordance with SNiP III-3-81. The list of acts and protocols of inspections and tests is determined by the VSN, approved in accordance with the procedure established by SNiP 1.01.01-82.