VV3 * 120 + 2 * 70 cable what does it mean
Trough is not conducive to heat, tray heat slightly better There is a cooling hole in the bottom of the tray tray Due to open the cooling holes, tray-type bridge plate thickness to thick points ★ problem belongs to the subject: professional information technology engineering water conservancy project the above content is based on the actual work of the students encountered problems, for reference, if any questions please communicate in time, correction
YJV cable is cross-linked polyethylene insulation, VV cable is PVC insulation, the former temperature level higher than the latter, such as the former conductor temperature can be 90 degrees, while the latter can only to 70 degrees!
Friends, shielded cable is a layer of mesh copper or metal wire woven from one or more wires surrounded by a cable, this layer of mesh to prevent lightning, the outside signal can not interfere with it, and control cable is used To control the device to start the protection circuit, etc., in general occasions do not need to shield, with the general insulated wire on it, as long as the load on the line.
