(When wiring, the color of the phase line and the neutral line should be different; the color of the phase line (L) in the same equipment room or equipment should be the same, the neutral line (N) should be blue, and the protection line (PE) must be a yellow-green two-color line . Overcurrent is generally 6A/square for copper core wire and 3A/square for aluminum core wire. The thickness of the power supply cable can be calculated according to this specification.)
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