An RV arriving at a campground may soon bring a different check on its electrical supply. Grounding Monitor Interrupters, or GMIs, are the focus of RVIA’s updated industry resources. For properties hosting visiting RVs alongside park-model accommodations, this is a useful moment to organize records and responsibilities. This edition connects the dated announcements with practical preparation; it does not diagnose a property or prescribe electrical work.
The short version
What to know today
- Track RVIA’s production schedule, gather the property records and plan the professional review. Keep electrical testing with qualified people and park-model applicability a separate question.
01 / GMI timeline
Read the production dates carefully
Industry update · RVIA announcement June 9, 2026
Reported facts
RVIA’s June 9 announcement sets January 1, 2027 as the effective date for the GMI requirement, with mandatory enforcement beginning at each manufacturer’s respective model-year-2028 production start. The announcement identifies new RVs with 30-amp or 50-amp electrical service.
Who this matters to
- Campgrounds · Resorts · Developers
- Owners can connect the review to their operating calendar. Seasonal parks can identify a suitable assessment window without waiting for the first guest to raise the question.
02 / Review ownership
Give the preparation a clear owner
Industry update · Task force announced September 1, 2026
Reported facts
On September 1, RVIA announced a GMI task force involving campground organizations and operators, RV manufacturers, suppliers, dealers and electrical experts. Its work includes education about equipped RVs and responding when a device interrupts power.
Who this matters to
- Campgrounds · Resorts · Glamping operators
- Mixed-accommodation properties can identify which spaces serve visiting RVs, which serve other accommodations and who manages each. Keep those uses clear in the project notes.
03 / Professional review
Ask for a property-wide professional review
Updated guidance · RVIA resource page updated September 27, 2026
Reported facts
RVIA explains that a GMI checks the incoming ground connection before allowing power into the RV and can disconnect power if grounding is lost. Its current resource recommends a licensed electrician’s evaluation from the main service through the distribution equipment to every pedestal. It also cautions that a plug-in tester cannot detect every condition a GMI can detect.
Who this matters to
- Campgrounds · Resorts · Developers
- The deliverable to request is a documented assessment and next steps for this property. This article supplies no electrical test procedure, wiring specification or equipment recommendation.
04 / Staff handoff
Make the staff handoff useful and bounded
Safety reference · OSHA guidance checked October 5, 2026
Reported facts
OSHA’s equipment-use rule reserves testing on electrical circuits or equipment to qualified persons. The reference supports keeping an ordinary guest-service checklist separate from electrical testing and troubleshooting.
Who this matters to
- Campgrounds · Resorts · Short-term-rental hosts
- Practice the handoff using a fictional guest report. Check whether the next person can understand what happened and who owns the response without relying on a shift-change conversation.
05 / Park-model scope
Keep park-model and parcel questions separate
Evergreen reference · RVIA definition checked October 5, 2026
Reported facts
RVIA describes park model RVs as designed for temporary recreational, seasonal, camping or travel use rather than permanent residence.
Who this matters to
- Seasonal retreat buyers · Landowners · Wineries · Wedding venues · Developers
- A venue exploring park models can use the same habit of clear records and named reviewers while obtaining answers for its own product and proposed location.
One useful next step
Before the next conversation.
Start with a short, dated file that another team member could pick up. These are editorial planning suggestions, not a technical inspection or operating certification.
- Who owns the readiness review, and where are the latest inspection reports and site map?
- Which questions should the electrical contractor answer about the whole property and staff escalation?
- How will findings, follow-up work and professional return-to-service decisions be recorded?
- Which product-specific and parcel-specific questions still need separate answers?
Leave unanswered items visibly open. Record the reviewer and date when an answer is received, and update the file after professionally reviewed changes.
Read the originals
Sources & dates
Source publication dates and reporting periods are separate from this edition’s date. Undated background material is identified below.
- Board Sets Model Year 2028 Effective Date for GMI Enforcement (opens in a new tab)
RV Industry Association · June 9, 2026. Published June 9, 2026. RVIA effective and enforcement dates are distinct; checked October 5, 2026.
- RV Industry Association Establishes Grounding Monitor Interrupter Task Force (opens in a new tab)
RV Industry Association · September 1, 2026. Published September 1, 2026; checked October 5, 2026. Describes the cross-industry education effort.
- Grounding Monitor Interrupter resources (opens in a new tab)
RV Industry Association · Resource page updated September 27, 2026 to add dealer guidance and broaden the background; checked October 5, 2026. This is the page update date, not a new enforcement date.
- 1910.334 — Use of equipment (opens in a new tab)
Occupational Safety and Health Administration · Current official regulatory reference, section 1910.334(c)(1); no publication date displayed. Checked October 5, 2026. Cited for the qualified-person testing boundary, not a site-specific compliance opinion.
- What is an RV? (opens in a new tab)
RV Industry Association · Undated industry reference; checked October 5, 2026. Used for park model RV recreational and seasonal design intent, not to determine GMI applicability.