Mobile Homes | Grounding Electrode System

The National Electrical Code (NEC) does not typically require additional ground rods at the mobile home “sub-panel” if the service panel is properly grounded and the “sub-panel” is properly bonded. We are using the term “sub-panel” instead of the proper term Remote Distribution Equipment for simplicity’s sake.

The key points are:

Service Panel Grounding: The service panel, which is up to 50 feet from the mobile home, must have its own grounding electrode system installed.

Grounding Electrode Conductor (GEC): A grounding electrode conductor should run from the service panel to the grounding electrodes.

Sub-Panel Bonding: The “sub-panel” at the mobile home must have a four-wire connection (two hots, one neutral, and one equipment ground) from the service panel. The ground and neutral should be separated at the “sub-panel”, and the neutral should not be bonded to the “sub-panel” metal case.

Additional grounding electrodes are generally not required at the “sub-panel” if the above conditions are met. However, some local codes and regulations may have additional requirements or improper interpretations, in our opinion, so it’s important to verify with local authorities.