What is the difference between a trough bridge and a tray tray?
Specifically look at what the situation, from the current national norms, Atlas does not add the argument
The steel pipe is easy to make the cable broken, and the steel is conductive. Really want to break the skin, increase the danger
Upstairs did not understand the meaning of the question. Wire access control box is to set the length of the. The general requirements of the length of the land is not very high, the distribution box is particularly evident, many building distribution boxes are casually put the point line where the spare. Instruments and equipment on the electrical control box is a very high demand. In the line, from the terminal to the outlet hole is generally between the zigzag, tie tie, the length of the reservation line is about 1.5 times the width of the control box (about). This can be convenient after the replacement of components, maintenance and so on. Wiring is not like land with a direct cable access, but there are related technical requirements, such as anti-corrosion, anti-corrosion, and so on.
