now, in general, most people use cross-linked cables in their homes and sometimes choose their own wires. what options do we have to choose from at this moment? now we will tell you how to choose a residential wire from a cross-linked cable what?
we all know that the residential line conductor material and cross-section - conductor material with "copper" and "aluminum" of the points, first of all should be used in residential copper wire, and should use large cross-section of copper wire. if the wire cross section is too small, the consequence is that the wire heat increases, the outer insulation aging accelerated, easily lead to short circuit and ground fault. according to relevant state regulations, the cross-sectional area of the copper wire should be 10 mm2 before the meter, 2.5 mm2 for the general lighting and socket copper cross-section in the house, and at least 4 mm2 for the copper wire cross-section of air conditioners and other high-power household appliances.
residential line conductors are selected single-core insulated wire. residential power lines in general are:
1, the use of protective plastic boxes to wire, buried in the wall to use hose (including pvc tube), the interface must be straight / elbow. where it is not possible to use hoses, use metal hoses for protection.
2, air-conditioning lines to use 4 square millimeter, and to each air conditioner are separate alignment.
3, buy wires, switches, etc. must buy good goods, the only thing that is its compliance with national standards. at the time of purchase, the dealer should indicate this.
4, telephone lines, television lines and other signal lines can not be parallel with the wire alignment.
5, the main line with 2.5 mm2 copper wire.
through the above understanding, household power lines should be used bvv2 × 2.5 and bvv2 × 1.5 models of wires. bvv is the national standard code for the copper sheathed wire, 2 × 2.5 and 2 × 1.5, representing 2.5 mm2 core and 2 cores 1.5 mm2. under normal circumstances, 2 × 2.5 to do the main line, trunk, 2 × 1.5 to do a single electrical branch, switch line. single-phase air-conditioning with bvv2 × 4, reprovision dedicated ground.