Last year, RVers debated whether grounding monitor interrupters (GMIs) would improve safety or create headaches at campground power pedestals. Now the RV industry has put a date on when the devices are expected to become standard equipment in new RVs.
RV Travel previously reported on the GMI requirement and why it sparked concern among some RVers who worried the devices could reject power from improperly grounded campground pedestals. You can read that earlier report here.
The latest update comes from the RV Industry Association (RVIA), whose board recently approved Model Year 2028 as the target enforcement date for the requirement.
What is a GMI?
A grounding monitor interrupter (GMI) is designed to verify that a proper equipment ground exists before allowing electrical power to flow into an RV. If the device detects a loss of grounding protection, it can disconnect power.
Supporters say the technology could help reduce the risk of electrical shock hazards associated with improperly grounded electrical systems. Critics have questioned how the devices will interact with older campground electrical systems that may have grounding issues.
The requirement stems from changes to national electrical standards that eventually will affect newly manufactured RVs.
The industry sets a date
The RV industry now plans to begin enforcing the GMI requirement with Model Year 2028 RVs.
RVIA originally planned an earlier rollout, but manufacturers and suppliers said listed, production-ready GMI devices were not yet widely available. The new Model Year 2028 date is intended to give the industry more time to prepare.
Under the revised timeline, RV manufacturers now have a clearer target for integrating the technology into future models.
For consumers, that means many RVs built during the 2027 production cycle and sold as 2028 models could begin appearing with GMIs installed.
Remember the GMI controversy?
When RV Travel first reported on the upcoming GMI requirement, reader reaction was unusually strong. Much of the discussion focused on campground electrical systems and how the new devices might interact with older power pedestals.
GMIs are designed to verify that a proper equipment ground exists before allowing power into an RV. If a grounding problem is detected, the device can interrupt power.
Supporters say the technology adds an important layer of electrical safety. Critics have questioned how often campground electrical systems might trigger the devices and whether some parks could face pressure to upgrade aging infrastructure.
The debate highlighted a reality many experienced RVers already know: Campground electrical systems vary widely in age and condition.
“Many RVers worried that older or improperly maintained campground pedestals could fail the grounding checks required by the new devices.”
What campgrounds may need to do
The rollout does not affect only RV manufacturers.
Campground operators may increasingly need to verify that pedestals provide continuous grounding protection and comply with applicable electrical standards.
Industry groups have repeatedly said campgrounds should inspect and maintain their electrical systems to ensure proper grounding.
That doesn’t necessarily mean widespread campground upgrades are imminent. However, it does mean electrical maintenance and testing may receive greater attention as more GMI-equipped RVs enter service.
What happens next?
For now, nothing changes for owners of existing RVs. The requirement applies to newly manufactured units, not RVs already on the road.
But the approval of a Model Year 2028 enforcement date means the countdown has effectively begun. For RV buyers shopping over the next two years, GMIs may become one of the more significant electrical changes to appear in new RVs. Whether RVers view them as a welcome safety feature or a potential campground compatibility headache remains a matter of debate.
One thing is now clear: The debate is no longer about whether GMIs are coming. The industry has now put a date on when RV buyers may start seeing them.
Sources include:
RVIA GMI enforcement announcement
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