Cable tray and metal trunking difference

Metal trunking and cable bridges are different: cable bridges are used to lay power cables and control cables, metal trunking is laying wires and communication cables. The bridge is larger, the degree of wire channel is smaller. Bridge turning radius is relatively large, most of the wire channel to ask a right-angle bend. Bridge span is relatively large, the wire channel is relatively small; fixed, an answer to install different ways. In some places, the bridge is not covered, the trunking is almost exclusively closed with a cover. Wire channel is used to walk the line, the bridge is used to walk the cable. The use of different environments, trunking is often can not be used in the open air, while the bridge can be.