Is Bonding Required for RV Generators?

Generator Grounding Requirements

The National Electric Code (NEC) requires that all generators, including those in RVs, be properly grounded to prevent electrical shock and ensure safe operation. To achieve this, generators must be bonded to an earth ground using a suitable grounding conductor, typically a grounding cable. This bonding connection should be made to a grounding system that meets the NEC’s requirements for resistance to ground.

Bonding Techniques for RV Generators

For RV generators, bonding can be achieved by connecting the generator’s grounding system to the RV’s electrical grounding system. This is typically done at the generator’s grounding point, which is usually located near the engine or generator block. The grounding cable should be sized according to the NEC’s tables, with a minimum size of 6 AWG for generators producing more than 30 amps. When bonding the RV generator, it’s essential to ensure that the system meets the NEC’s requirements for resistance to ground, which is typically 25 ohms or less.

Safety Considerations and Testing

To ensure that the generator’s grounding system is functioning correctly, regular inspections and testing are necessary. One way to test the grounding system is to use a multimeter to measure the resistance between the generator’s grounding point and the RV’s electrical grounding system. If the resistance is greater than 25 ohms, the bonding connection should be checked and adjusted as necessary. Additionally, RV owners should follow the manufacturer’s instructions for testing and maintenance of the generator’s electrical system.