Wiring

The next stage of work on electricity at home - electrical wiring. Depending on the design space, moisture in it, temperature changes, the destination is chosen type of wiring harness. Open wiring. Dlyamontazha open electrical wiring is used insulated wires and cables are soft-skinned with a rubber or plastic insulation with metal cores of up to 16 mm2. Laying a wiring harness used frequently performed on roller skates with isolated solid wires, mainly for lighting networks. Permitted and the use of flat wire marks APN and APPV. Now open electrical wiring is not usually performed on roller skates, and with the help of special plastic skobochek. Frequently used hidden electrical flat wire laid in the voids, seams, indent the walls and ceilings. The most common brands of wires for hidden electrical wiring: APPV, APPVS, APV, APN, TPRF, cables - AWG ASRG, VRG, AVRG. In the steel pipes hidden electrical wires carried Aprt, LTA, APV, PRTO, PR with insulation rated for a voltage below 500 volts AC. In the plumbing industry should: - connect the pipe with threaded couplings to seal joints in wet areas - to lay the pipe with a slight slant towards the junction box, thereby avoiding the accumulation of moisture in the pipes - if the steel pipes are used as a grounding electric wires, fittings perform with tow soaked in red lead and linseed oil - for free pull wires have to observe some bending radii. The smallest radius of curvature is usually at least tenfold pipe radius. Hidden wiring runs and rezinobitumnyh pipes, and insulating pipes with a thin metal shell. Choosing one or another form of hidden wiring is defined as the design features of facilities and range of electrical products available for purchase. When installing the wiring is very important type of wire used in various circuits. For example, you summed up the wire to an outlet to which is attached only to wall with one light bulb in 100 watts. At a voltage of 220 V electric current flowing through the wire 1 = 100 Vt/220 V - 0.5 A. But if this outlet is turned on and electric power 1,5 kW, then the wire must be designed to current 1 = 1500 Vt/220 B-7 A. The following table. 32 [12] shows the current load of wire with copper and aluminum conductors with rubber or PVC insulation. Table 52. Current capacity, and for determining the number of wires installed in one pipe, neutral wire of the four-phase current to be disregarded. Line of general lighting and power outlets are usually performed separately. Nominal values ??of amperage breakers group lines and inlets typically 16 A for a group of lighting network and sockets - 6-10 A (in homes without air conditioners). The minimum number of outlets. In the living room - not less than one per 6 m2, in the hallways - at least one for every 10 m2, in bathrooms is better to install the sockets through the transformer. For appliances up to 1,3 kW installed sockets with a grounded, 10 A, with more power up to 2,5 kW at 16 A. Building codes require at a voltage of more than 65 in observance of special security measures. It is basically a "ground zero" for this neutral wire of the transformer reaches out to low-voltage distribution network (Figure 143). Sockets in the bathroom shower is equipped with three lead wire, a separate non-conducting wire (shown in Fig. 143 - P). If the neutral wire (N in Fig. 143) and will be damaged, the safety of the socket will not be compromised. Fig. 143. Protective measures against electric shock 1 - neutral neutral wire circuit, 2 - neutral instrument separate netokoprovodyashim wire.