Switching power supply input and output reverse
What happens if the input and output of the switching power supply are accidentally connected in reverse? In addition, the purchased switching power supply, although the incoming line is also divided into L and N, but there is no problem in how to connect it, is it really possible?
1. Yes, provided that there are single-phase devices that do not need to be connected to zero or grounding protection (like using a two-eye socket), the order of L and N is irrelevant. Taking into account the power supply and the grounding and safety of the entire system, the wiring is still in accordance with the signs of L and N.
2. If it is necessary to connect single-phase equipment with zero or ground protection (like a three-pin socket, the order of upper hole protection, left N, and right L cannot be reversed). If the order of left N and right L is reversed, the device shell will become FireWire (TN-C).
3. The standard wiring should distinguish between fire, zero and ground, so that your power supply system can be standardized as if the face on the three-hole socket is ground, and the left zero (N) right fire (L).
4. Current household appliances and industrial appliances use three-wire plugs, which are very safe. The first two plugs are gradually being phased out.
