Note: For motor circuits, sometimes a larger EGC is required.
The cable connecting the installation's earth bar to the supplier's earth terminal (or earth rod) is sized differently than circuit earth wires. earth cable sizes
Here is a guide to earth cable sizes based on common international standards (IEE/BS 7671 UK and NEC USA). Note: For motor circuits, sometimes a larger EGC is required
In certain environments, the standard earth size must be increased for safety. This is common in locations with high shock risk or where equipment is connected via a plug and socket. Note: For motor circuits
Use of BS 7671 (or IEC 60364-5-54):