Home electrical wiring, symbols and checking

This article explains the basics of home electrical wiring and its symbols. There is also a simple guide on what to check at the end of the post.
However, this is a long article. If you can see what you are looking for at the RELATED ARTICLES section below, you may want to visit that post first.
============================================RELATED ARTICLES:
House electrical symbolsSimple house

Switchboard electrical tests

The following electrical tests must be carried to all switchboards, sub-switchboards, main distribution boards and motor starter panels.A. Full type tests1) Full type tests shall be carried out in accordance with IEC 60439-1, IEC 60947-1, and IEC 60947-6-1. Certificates issued by approved independent testing laboratories shall be submitted to the Employer’s Representative.The type tests shall