Composition and representative meaning of wire and cable symbols

Symbols for wires and cables: I. Purpose code - not marked as power cable, K is control cable, P is signal cable; 2、 Insulation code - Z oil-immersed paper, X rubber, V polyvinyl chloride, YJ cross-linked polyethylene; 3、 Conductor material code - not marked as copper, L as aluminum; 4、 Internal protective layer code - Q lead package, I aluminum package, H rubber sleeve, V polyvinyl chloride sheath; 5、 Derivative code - D no drip, P dry insulation; 6、 Code of outer protective layer; 7、 Special product code - TH wet tropical zone, TA dry tropical zone; 8、 Rated voltage - unit KV

Meaning of general symbols for cables

1) ZR － flame retardant, NH － fire resistant, ZA (IA) － intrinsic safety, 2) use, K － control cable, P － signal cable, DJ － computer cable, 3) insulation layer. V － PVC, Y － PE, YJ － XLPE, 4) conductor. T － copper core defaults to L － aluminum core. 5) Internal protective layer (sheath), V-PVC, Y-PE, Q-lead, L-aluminum, H-rubber, HF non-combustible rubber, LW corrugated aluminum, F-neoprene, N-neoprene rubber sheath.

Wire and cable sheath

Sheathed wire refers to single-core or multi-core wire with sheath, which is safer with sheath. To put it bluntly, our most commonly used "sheath wire" is a layer of white PVC sheath with several BV wires inside. This kind of wire is generally copper core wire. In addition to an insulating layer outside the wire, there is also a protective layer outside the wire. The commonly used sheath wires include RVV, BVV, RVVB and bvvb.