1、 Home wiring model:
1. BV (PVC insulated copper core wire, hereinafter referred to as BV) is single-stranded copper core, BVR multi-stranded copper core, BVV sheathed single-stranded copper core (double-layer PVC sheathed wire), BVVR double-rubber multi-stranded copper core.
2. In addition, pay attention to distinguish BV and BVR cable - BV is single-core wire (hard wire), BVR is multi-core wire (flexible wire), and BVR of the same square is about 10% more expensive than BV
Note: In the process of home decoration, it is necessary to lay wires in pipes, that is, BVR is more convenient for water and electricity construction than BV.
3. ZB-BV is a flame-retardant wire, which can retard combustion as the name suggests. It is generally used in places with high requirements for wires and cables.
ZR means flame-retardant. The flame-retardant grade of wires and cables is divided into three grades: A, B and C. ZB represents Class B flame-retardant, and ZR defaults to Class C flame-retardant. Flame retardant characteristics ZA>ZB>ZC, whether it is home wiring or power cable, there will be differences in flame retardant grade.