A safety device intended to help prevent electric shocks was set to be included in new RVs. Now that requirement is on hold because the equipment still isn’t available in sufficient quantities for manufacturers to finish testing it.
The delay affects the planned rollout of grounding monitor interrupters, or GMIs. These devices check the ground connection before allowing shore power into an RV and can shut it off if that connection is lost.
For owners who already plug in through a surge protector or electrical management system, that raises a reasonable question: aren’t we already doing this?
Why the requirement was delayed
The RV Industry Association announced the delay on November 12. Its previous schedule called for a January 1, 2027 effective date, with mandatory enforcement beginning with manufacturers’ model-year 2028 production.
According to RVIA’s announcement, there still aren’t enough fully developed, listed devices available for manufacturers to complete production testing.
The association’s board plans to revisit the schedule at its February meeting. No replacement deadline has been announced.
What the device is supposed to prevent
The hazard is often called “hot skin.” An electrical fault can energize an RV’s metal frame, exterior, or other metal parts, creating a shock risk for anyone who touches them. Fiberglass-sided campers can also have exposed metal components.
A GMI checks the grounding path and refuses shore power if it detects a problem. It also monitors that connection while the RV is plugged in.
Under the planned requirement, the device would be permanently installed inside new 30-amp and 50-amp RVs, ahead of the electrical panel or transfer switch.
RVIA’s technical guidance points to damaged power cords, compromised adapter connections, and campground grounding faults among the problems these devices are intended to address. It also warns that a pedestal supplying power today could be rejected by a GMI-equipped RV because of an existing wiring issue.
Campground maintenance remains part of the picture. A device that shuts off power can flag a fault, but someone still has to find and repair it.
Frequently asked questions
Doesn’t my surge protector or EMS already do this?
Some of it, depending on your model.
Basic surge protection handles brief voltage spikes. More advanced electrical management systems, often called EMS units, can also detect wiring faults and disconnect power.
For example, the Progressive Industries EMS-PT30X and EMS-PT50X instruction manual says these units refuse power when they detect an open ground. Owners with that equipment already have protection against that condition.
The additional function involves the ground wire itself. UL’s definition of a Type II GMI includes the ability to disconnect that wire when voltage is present on it. An existing protector’s “open-ground protection” label alone doesn’t establish that it performs this extra function.
Check the documentation for your specific model rather than assuming every product sold as a surge protector offers identical protection.
Will existing RVs need to be upgraded?
The announcement concerns new RV production and contains no requirement for current owners to retrofit their campers.
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