PVC wires
PVC wires
— PVA marking corresponds to the term "copper wire in PVC insulation connecting". Both the outer sheath and the insulation of each core in such a cable are made of polyvinyl chloride. At the same time, the key difference from VVG (see the relevant paragraph), which also use PVC, is that the sheath is continuous and fills the entire space between the cores. In addition, the cores themselves are made only multi-wire.Thanks to all these features, one of the main advantages of PVA wires is ensured — excellent flexibility. At the same time, such a cable not only bends easily, but also tolerates repeated bending and unbending well, including pretty sharp. Such properties are indispensable for power cords used in various household electrical appliances, as well as in extension cords; in fact, this is the main scope of PVA. Another area of use is lighting systems, sockets, etc. where a highly flexible cable may be required. The disadvantage of this wire is its sensitivity to low temperatures — in such conditions, the PVC sheath loses its elasticity and may burst.
The PVA cable is designed for alternating current with a standard frequency of 50 Hz and voltages up to 400 V.
Show