General opening leakage circuit breaker + branch ordinary circuit breaker: home main switch + leakage protection, and then below is a pile of branch ordinary circuit breakers, which should be the common selection of circuit switches in families; Since it is universal, there must be a reason for its existence, that is to save money. The whole layout scheme has only one leakage protection, which is indeed cost-effective, but the disadvantages of this scheme are also obvious. Once someone inserts a leakage appliance into the socket at home, the main gate of the whole house will be tripped.

If it's dark, it's really hard to go to the Ready Board in the dark and test the leakage of that circuit all the way. Main switch + partial branch leakage circuit breaker: the main switch + partial branch leakage circuit breaker is that the general switch uses an ordinary 2p circuit breaker, and some branches, that is, the branches involving sockets use leakage switches. The air conditioning and lighting circuits are fixed.

Generally, the leakage may be small (except for the lighting in the toilet), so the leakage of sockets will only jump off the circuit breaker of their own circuit and will not cut off the power of the whole house. General switch + leakage circuit breaker of all branches: general switch + leakage circuit breaker of all branches, that is, the general switch uses ordinary 2p circuit breaker, and all branches use leakage switch.

This configuration can provide good leakage protection performance, and the leakage of any circuit will jump off without affecting other circuits. However, because all branches use leakage circuit breakers, the price is also very expensive. Note that the circuit wiring at home must not be mixed, otherwise the leakage switch cannot be closed at all.

Some electricians do not recommend multiple leakage switches for the whole branch, saying it is easy to trip; In fact, it won't. electricians are just afraid of mixing the circuit and rework. Everyone knows. Matters needing attention during type selection of air switch: select the type and number of poles of automatic air switch according to the purpose; Select the rated current of the automatic air switch according to the large working current; Select the type of release, type and specification of accessories of the Ready Board as required.