How to wire a DIN rail distribution board - practical demonstration (South Africa).
This is a lab setup for the practical demonstration of wiring a distribution board with several loads - lights, geyser, and plugs. Loads protected by earth leakage (RCD) and over current circuit breaker protection.
To wire a Samite rail board, please see video here:    • How to wire a distribution board with...  
Further details found in the SANS 10142-1:2020 wiring standard - The Wiring of Premises Part1: low voltage installations.