Wire on the 3 +2 with 4 +1 What is the meaning, please speak of the popular point, too professional do not understand.
The number 3 + 2 and 4 + . refers to the wire inside the skin, including five more thin wire; wire "3 +2", refers to the wire inside the five insulated wire, The three wires cross-sectional area of the same), the other two of the wires connected to a zero line (ie, the neutral line, the cross-sectional area than the previous three small), the remaining one ground wire (cross-sectional area than the first three small) ; Wire "4 +1", refers to the wire within the skin by the four insulated wires, if by the lighting of the "voltage 220v" two-phase line, one of the wires connected to the line, the other one wire Then the neutral line (ie, the neutral line), and then a wire grounding wire (ie grounding protection line), leaving the remaining two wires on the empty.
One-two lines at the same time when the work of high current, there may be some voltage drop is right, but the sound when the shutdown, it should be hard disk head power after the return of the sound, this disk I have one, but also this Sound, is normal, is not the reason for power supply. You use a sufficient power supply, shut down will be so loud. So be assured with it.
Yes, close to the ceiling below the security, buy 25X20 enough. Home air switch according to your own home power selection, 1 kilowatts by 4.5A current calculation, such as: your total power is 3 kilowatts, the current is 13.5A, to buy 16A open and missed.
If it is a cable trench, in general, the mortgage cable is on top, the high voltage cable is underneath
