GFCI Requirements for RVs & Marinas
Feeders at marinas commonly require ground-fault protection with a trip setting no higher than 100 mA, while shore power receptacles are held to a stricter 30 mA threshold under current code guidance.
Why marine environments need their own category
Even small amounts of stray current entering water near a dock can create a phenomenon known as electric shock drowning, where swimmers near an energized dock or boat can be incapacitated without any visible sign of electrocution. This elevated risk is why marina and dock wiring has its own, stricter protection requirements separate from standard residential GFCI rules.
What RV owners specifically should know
RV appliances are more prone to minor current leakage than typical household appliances, which is part of why many RV parks require GFCI-protected pedestals — and why an RV owner troubleshooting nuisance trips at a park pedestal should consider the RV's own wiring and appliances as a likely contributor.