wiring in cellars and basements
Depending on soil conditions, the effectiveness of ventilation, humidity, cellars and basements are moist and very moist rooms, and on the degree of danger of electrical shock - especially to thehazardous locations.
to the electrical wiring in the cellars and basements of increased requirements, namely:
- should apply voltage not exceeding 42 V. To do this, use the step-down transformers;
- wiring performed directly on the base isolators and rollers isolated secure wires or cables.If concealed wiring is prohibited to use steel pipes with a wall thickness of 2 mm or less;
- should be used lamps airtight structure to prevent moisture from entering the elektropatron;
- switch should be placed outside the cellar and a basement.
wiring in the attic
called attic room on the top floor, the ceiling of which is the roof of the building and which has a bearing structure (roof, farm, rafters, beams, and so on. N.) Of combustible materials.
Wiring attics performed mainly for laying inputs from overhead lines in the terminals apartment building panel.The cottages lighting lofts are required.
installation of any electric wiring , excluding laying inputs, attics, with designs made of flammable materials, it is better not to perform.
attic have a number of features .They are subject to fluctuations in temperature, as a rule, dust, have an increased fire hazard.Accidentally resulting damage wiring can cause a fire of wooden structures and further fire.Therefore, the electrical wiring in the attic increased requirements.
in the attic, you can use the following wiring:
- open - wires and cables in steel pipes and secure wires and cables sheathed in fireproof and nonflammable materials at any altitude;
- unprotected single-core insulated wires roller and insulators at a height of not less than 2.5 m from the floor.
At a height of less than 2.5 m protect them against contact and mechanical damage.The distance between the points of attachment clips should be no more than 60 mm, insulators - not more than 1000 mm, between the wires - not less than 50 mm.The height of the rollers should be at least 30 mm.Rollers mounted on boards patched to the rafters.
hidden wiring performed in the walls and ceilings of fireproof materials at any height.
open wiring in the attic carry the wires and cables with copper conductors.Wires and cables with aluminum conductors can be laid in buildings with fireproof ceilings provided them laying in steel pipes or hidden in fireproof walls and ceilings.The transit line in the attics of up to 5 m are allowed to carry cables with aluminum conductors.
When laying steel pipes necessary to exclude the penetration of dust inside the pipes and junction boxes, which used sealed screw connections.Pipes can be connected by means of threaded couplings without seals in dry and dust-free attics.
pipes laid with a slope so that they could not collect moisture.
connections and branches of copper or aluminum conductors wires and cables carried out in metal connection (junction) box by welding, crimping or by a squeezing, relevant material, cross-section and the number of strands.
offshoot of lines laid in the attic , to the power-consuming equipment, set out attics, allowed provided gaskets, as lines and branches opened in steel pipes.Hidden in fireproof walls and ceilings.
breaking device in circuits supplying lighting fixtures located directly in attics, lofts is set, for example, at the entrance to the attic.
steel pipes, metal housing fixtures and other metal structures wiring must be neutral earthing.
WARNING!In attics avoid installing any non-metallic pipes.
11 May 2016
wiring in cellars and basements