Basic Reason for installed switch socket without electricity

Switch socket, Australia standard wall switch socket electricity pen test hole, and insert the plug into the hole without electricity within the reasons are:
First, Fire Wire has electricity, but is not normal electricity, at this time also need to check the zero line is open circuit.

Second, check the anode contact whether they are of good elasticity, plug in, the socket shrapnel and plug have contact with each other without exception.
Third, pencil test, the light is said is electrified wire, proved to be a disconnect the zero line, will cause the switch socket without electricity.
Forth, wall switch socket manufacturers check whether zero line joint short circuit, unwrapped socket panel first, see if it has a problem, can the normal work of the socket in a zero line guide into the socket, if can normal electricity, said the original zero line in the current, to the original line pull down, to take the connection of a professional electrician.