The new grounding monitor interrupter (GMI) installation requirement, which is part of the National Electric Code, is delayed to June 1, 2027. In November, the RV Industry Association (RVIA) board unanimously approved the delay of the requirement, which was set to take effect on January 1, 2026.

According to RVIA, the lack of fully developed, listed GMIs available for RV use in manufacturing made it necessary to postpone enforcement of the GMI requirement.

Starting in June 2027, all RVs with 30A or 50A electrical service will have to be equipped with a GMI. The GMI requirement was established to prevent “hot skin” condition, which occurs when an RV’s metal exterior, frame or other metal items become electrified and can cause a serious safety hazard.

The 2026 National Electric Code and the RV industry are working to protect consumers through the installation of the GMI. The device tests the electric receptacle when it is plugged in to ensure it is wired correctly and has a proper ground connection. If the GMI detects incorrect wiring or the loss of ground connection, it will not allow electricity to pass through or it will disconnect the power if the loss of ground occurs during the operation.

The National Fire Protection Association (NFPA) updates the National Electric Code every three years. Article 551 of the code contains the electrical requirements for RVs and RV parks and campgrounds. The code was updated following public comment on the “hot skin” conditions over the past six years.

To prepare for the GMI implementation, RVIA recommends campgrounds and RV parks test their electrical systems to ensure there is good ground continuity for the RV site pedestals back to the electrical service panels. This testing should be part of their annual preventative maintenance. Portable 30A and 50A RV receptacle testing devices are available commercially for campgrounds and RV parks to test their electrical systems.