It is not allowed to connect them together. The power outage may be due to maintenance work. Once the neutral line is connected, the voltage will be cut off. generated on the neutral line. Workers are in danger. If it is a dual feed, a four-wire breaker should be used and the neutral line should be completely shut off. This four-wire circuit breaker is specifically designed for dual feeds.
1. As long as no loops are formed, there is usually no problem!
2. If the original power system is a grounded power grid TN system and the load is connected to zero using protection: At this stage, when a small generator is used to replace the original power system. , the neutral line cannot be disconnected. It is recommended to repeat it on site once.
3. If the original power system is a computer system, the charginge adopts protective grounding: , there is no need to disconnect the neutral line of the switch, and it should be noted that the neutral line is well isolated from the ground and should not be grounded earth ; of course, at this time the neutral line may also be disconnected. of the switch, but it must be ensured that when the power supply is restored to the network, the neutral line is in good contact and the closing timing is good, otherwise the neutral line switch will be harmful;< /p>
4, in short, do not disconnect the neutral line, do not enter the switch, it is important to maintain the continuous conduction of the neutral line, but there is no harm!