There is only one core in the middle of the BV wire, which is made of hard material, so it is also called a hard wire. Generally speaking, the service life of hard wires is equivalent to the residential life of a house, and they are not easily oxidized, making them more suitable for concealed circuits. But if this type of wire is bent, it is difficult to recover, and once bent, it is prone to wear and tear, leading to circuit faults.
The core wire in the middle of the BVR wire is composed of many strands because it is soft, also known as a flexible wire. Flexible cords are prone to wear and tear, easy to maintain, and require faster construction; Soft wires have a larger cross-sectional area and better conductivity than hard wires, making them more energy-efficient; The flexible wire is composed of multiple thin copper cores, which provide better heat dissipation and are safer. But the service life of the soft wire is short, the oxidation rate is fast, the core is prone to breakage, and local heating occurs. It needs to be replaced in a timely manner.
BV wire:
Disadvantages: The wire is relatively hard, difficult to bend and straighten repeatedly, and prone to injury when bent or straightened.
Advantages: Long service life, single core is less prone to local short circuits and damage.
BVR wire:
Advantages: The wire is relatively soft and suitable for installation in temporary electric fields, making it easy to move.
Disadvantages: Short service life, fast oxidation rate, susceptible to local short-circuit current impact, easily oxidized at high temperatures, prone to core breakage, local heating and other problems.
A Brief Discussion on the Difference between BV Wire and BVR Wire
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