Electrical wiring in cellars and on attics

Cellars and cellars , as a rule, build of fireproof materials and designs (the bricklaying, steel concrete blocks, overlappings, etc.). Floors are usually conducting: earth, concrete, from the beaten brick, etc. Depending on the condition of soil, efficiency of ventilation, relative air humidity of the cellar and cellars belong to crude and especially crude rooms, and on degree of danger of defeat by electric current — to especially dangerous rooms. Increased requirements are imposed to electroconductings in cellars and cellars, namely:

Схема электропроводки в подвальном помещении

The scheme of the electrical wiring in the basement.

Electrical wiring in garrets

The buried electrical wiring is made in walls and overlappings of fireproof materials at any height.

Opened the electrical wiring in garrets carry out wires and cables with copper veins.

Wires and cables with aluminum veins can be laid in buildings with fireproof overlappings on condition of laying them in steel pipes or it is hidden in fireproof walls and overlappings.

Разметочные расстояния электропроводки на роликах

Marking distances of the electrical wiring on rollers: and – for laying of routes; – for installation of switches; in – for the bypass of obstacles: 1 – funnel; 2 – rubber semisolid tube; 3 – heating pipe.

Transit lines on attics up to 5 m long are allowed to be carried out wires with aluminum veins. When laying steel pipes it is necessary to exclude penetration of dust in pipes and connection boxes what apply the condensed threaded connections to.

Pipes can be connected by means of couplings to the thread without consolidations only in dry and easy attics. Pipes lay with the bias so that in them moisture could not accumulate.

Connections and branches of copper or aluminum veins of wires and cables carry out in metal connection (dividing) boxes by welding by molding or by means of the clips corresponding to material, section and the number of veins.

Branches from the lines laid on the attic, it is allowed to the electroreceivers installed out of attics on condition of laying both the line, and branches openly in steel pipes, it is hidden in fireproof walls and overlappings.

The disconnecting devices in the chains feeding lamps, located directly on attics establish out of attics, for example, at the entrance on the attic.

Steel pipes, metal body of lamps and other metal designs of the electrical wiring have to be zanulena. On attics it is forbidden to lay any nonmetallic pipes.

COMMENTS
  1. Oleg

    Where you took what on the attic it is impossible to lay nonmetallic pipes? Misters, do not take people for a ride, you watch PEU (Regulation for electrical installation)
    Section 2 point 2.1.69!

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