Why is the wall socket in Fujian so big?

The biggest reasons for using sockets are as follows:

First, the general shell of high-power electrical appliances needs to be grounded, and three hole socket has a grounding wire.

Second, the three hole socket is firmly plugged and has good contact, which is suitable for high-current appliances.

Third, high-power electrical appliances require good contact due to relatively large current, and are designed to be stable in three-hole contact and not easy to fall off. There is a ground wire on the second side. If the shell leaks electricity, it can make the current flow to the ground to protect the operator!