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551.71(A) & (F) WR and GFCI Protection at RV Parks

Revison and New

Change Summary

  • All RV sites must be equipped with at least one WR (Weather-resistant) 20 amp, 125 volt receptacle, but TR not required. All 125-volt, single-phase, 15- and 20-ampere receptacles at RV parks are required to have listed ground-fault circuit-interrupter (GFCI) protection for personnel.
NEC® Text

Part VI. Recreational Vehicle Parks
551.71 Type Receptacles Provided
(A) 20-Ampere. Every recreational vehicle site with electrical supply shall be equipped with recreational vehicle site supply equipment with at least one 20-ampere, 125-volt weather-resistant receptacle. This receptacle, when used in recreational vehicle site electrical equipment, shall not be required to be tamper-resistant in accordance with 406.12.
(F) GFCI Protection.
All 125-volt, single-phase, 15- and 20-ampere receptacles shall have listed ground-fault circuit interrupter protection for personnel. The GFCI devices used in RV site electrical equipment shall not be required to be weather or tamper resistant in accordance with 406.9 and 406.12.
Informational Note: The percentage of 50 ampere sites required by 551.71 could be inadequate for seasonal recreational vehicle sites serving a higher percentage of recreational vehicles with 50 ampere electrical systems. In that type of recreational vehicle park, the percentage of 50 ampere sites could approach 100 percent

Material taken from the National Electric Code® is reprinted with permission from NFPA 70®, 2020 edition.
National Electrical Code®, Copyright 2019, National Fire Protection Association, Quincy, MA. All rights reserved.

Expert Analysis

The most significant change here is at 551.71(A) where the NEC now wants the 20 amp, 125 volt receptacle to be weather-resistant, however not tamper resistant.

Leviton Comment
Interesting how standard receptacles must be WR, but GFCI receptacles don’t need to be WR. The NEC also ignores 30A and 50A receptacles relating to GFCI protection. We believe they intended to address this, but never made it to print.

Leviton Solution
For RV connection, Leviton offers receptacles to comply with requirements of Article 551.71 Weather-Resistant GFCI Receptacles
Receptacles at RV sites can take a beating. Leviton’s SmartlockPro® Weather Resistant (WR) GFCI receptacles are up to the challenge. They are UL Listed weather-resistant to comply with Section 551.70(A) of the National Electrical Code®. Constructed with UV stabilized thermoplastic for high cold impact resistance, the devices feature stainless steel straps and mounting screws. Rain or shine, Leviton offers products to meet all your outdoor needs.
Important: Covers must be used with WR GFCI receptacles in damp or wet locations per NEC Section 406.9(B)(1).

 

Cat. No. GFWR2 7313 279
Cat. No. GFWR2 Cat. No. 7313 Cat. No. 279
20-Amp, 125-Volt, 30-Amp, 125-Volt, 50-Amp 125/250-Volt,
Weather-Resistant Industrial Grade Flush Industrial Grade Flush
Self-Test Receptacle Mount Receptacle Mount Receptacle

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