Ask you a question, the basement has a power distribution room, high pressure into the wall in the shear wall to stay a few walls through the wall, asked, after the cable through the casing, the cable and how to do between the waterproof treatment? Because now rain, rain water along the casing to the basement irrigation. In the underground garage outside the wall to do a well, the casing around, but still not, because the rain, the wells will be water, the same to the basement irrigation, this place generally how to deal with, it is best to give What is the explanation of what more
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Digital TV signals are packaged to send, and the frequency of each package is not the same
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In low-voltage distribution systems, the neutral line is often grounded at the power supply (transformer). Neutral line after the ground and the voltage between the ground is zero (or close to zero), commonly known as zero line. This is done only to make the wire in a relatively safe, easy to identify, not for the provincial line (the earth as a conductor). The current circuit (ie, wire) is still composed of "FireWire" and "zero line". So the zero line is still on the pole.
