The role of three hole socket
The real purpose of using three hole socket in washing machine is to prevent electric leakage and avoid the danger of electric shock.
Connection method of switch
The switch can be connected to the live wire or the neutral wire, but the live wire is safer. Because when the switch is turned off, the live wire will be cut off to avoid the danger of electric shock.
How to distinguish between zero line and live line
You can tell the zero line from the live line with a pencil. Stand on the ground and touch the conductor. If the neon tube glows, it is the fire line. No light is the zero line.
Function of fuse
The function of a fuse is to blow. When the current is too large, the fuse will blow to avoid short circuit or excessive total power of electrical appliances.