The difference between a fire resistant cable and a general power cable
First with the liner is the fire-resistant bridge, fire bridge is only the surface brushing fire paint, and some design drawings are written and norms a bit vague, according to his drawings should be refractory bridge.
We usually say how many square millimeters (wire) refers to the cross-sectional area of the wire core, that is, according to the diameter of the core calculated cross-sectional area. The larger the cross-sectional area of the wire, the greater the capacity of the power transmission.
The domestic general by the following parts in order, some parts can be omitted: 1: category, use the first letter with the Chinese alphabet, such as K on behalf of the control cable, C on behalf of the marine cable Q car ignition line D power cable Y Mobile rubber sheathed cable H welding machine cable 2: conductor with the first letter of the Chinese alphabet said: such as T for the copper, L for the aluminum LG for the ACSR 3: Insulation material with the letter code, such as V for the PVCY Polyethylene 4: Sheath with the letter of the letter code with 35: feature code used in the first letter of Chinese spells, such as the circle with R, soft R, flat B, flat with B6: outer sheath with the number that: 22 the first representative of the steel armor, the second representative of the PVC jacket 7: derived code with a number or symbol, such as BV-withered Sichuan Fen boil let go wind sand dust 90 said temperature 90 degrees BV line can be omitted Generally have: D power cable T copper R round like VV. you control the order of the above carefully understand, which omitted the 1.2.5 three, you should see clearly.
