Basic knowledge sharing of wires and cables

Reminder from the manufacturer of communication cable filling paste: the meaning of BV, BLV and other marks in wires and cables

This mark is all about some models and specifications of cables. B series products are classified as cloth cables, so B is used. Working voltage: 300 / 500V cables are divided into special cables and general insulated cables according to their main uses. Insulated cable is also called cloth cable.

Insulated cable (cloth cable) refers to the cable covering the cable sheath, including various electrode connecting wires and installation wires.

V is PVC, polyethylene, that is (plastic)

L is the code of aluminum core

T is the code of copper core (generally omitted)

R is the meaning of (soft). To ensure soft is to increase the number of electrical conductors

Bv copper core polyethylene insulated cable

BLV aluminum core polyethylene insulated cable

BVR copper core polyethylene insulated flexible cable

Upper cable structure: electrical conductor + insulating layer

Take 2.5mm2 as an example:

BV is one with a diameter of 1.78mm and seven with a diameter of 0.68

BLV is a 1.78mm diameter

BVR is 19 pieces with a diameter of 0.41mm

RV copper core polyethylene insulation connecting flexible cable

It is softer than BVR, or 2.5 is 49 0.25mm copper wires

RVV copper core polyethylene insulating layer polyethylene protective wire sleeve connecting flexible cable

One more layer of plastic wire sheath than RV

In addition: the common "sheath line"

The manufacturer of communication cable filling paste pointed out that BVVB copper core polyethylene insulation layer polyethylene protective wire sleeve flat cable is two bv wires, with a layer of milky white protective wire sleeve