1.Read symbolBefore starting any electrical wiring read symbol of electrical connection in the given manual as well as device or machines for tag symbol for safe the human and property damage.
IMPORTANT ELECTRICAL WIRING GUIDE-LINES
2.Check Input current/voltageBefore starting any electrical wiring read the input-side power capacity or input current /voltage value then decide what kind of other tools required for my standard application used in household and industry.
3.Choose the right wire and componentswhen deciding what power is required then choose for the right wire of handling input power to output supply for other hardware. wire changes when because power distributed many sides as per your required like where is heavy control then use 3 phase and low control then use a single-phase power supply.