An Electrician must understand Electrical Wiring basics such as the Wire Size, Earthing, Electricity Circuits especially for House Wiring, How To Check Earthing, How a Switch Works, from the Electricity Meter all the way to the Consumer Unit. He must understand the difference between Ground and Earthing.
A two way one light switching system is very useful in wiring long walk ways , electrical installation in a house, corridor or even stairs.
This system consists of switches that are two way, meaning, they have a common connection point and an L1 and L2.
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