cable news: residential wiring and cross section selection
from：guichao author：admin click： 380 addtime：2017-04-16 13:44:38
residential wiring wire material and cross-section - wire material with copper and aluminum points,
first of all, the copper wire should be used in the house, and the copper wire with large cross section should be used as far as possible.
if the wire cross section is too small, the consequence is the heating of the wire,
the outer insulation aging accelerated, easy to cause short circuit and ground fault.
in accordance with the relevant provisions of the state, before the meter copper wire cross-sectional area should choose 10 mm2,
residential general lighting and socket copper wire cross section using 2.5 mm2,
the air conditioning and other large household appliances copper wire cross-section should be at least 4 mm2.
single conductor insulated conductors are selected for residential line conductors.
general standards for residential power lines are:
1: main line with 2.5 mm2 copper wire
2: air conditioning line to use 4 square millimeters, and each air conditioning to go alone
3: telephone lines, television lines and other signal lines can not be parallel with the wire
4: the use of wire to protect the plastic box, buried in the wall with a hose (including pvc tube),
interface must be straight / elbow. if you can not use hose,
must be protected by a metal hose.
5: buy wires, switches, etc. must buy goods,
the only criterion is whether it is in line with national standards.
in the purchase should allow dealers to indicate this point.
home power lines shall be bvv2 x 2.5 and bvv2 x 1.5 models of wire.
bvv is the national standard code for the copper sheath line,
2 x 2.5 and 2 x 1.5 represent a core of 2.5 mm2 and a core of 1.5 mm2 2.
under normal circumstances, 2 x 2.5 to do the main line, trunk, 2 x 1.5 to do a single electrical branch, switch line.
single phase air conditioner with bvv2 x 4, with special ground wire.