TIA 1474

[TwistLock]

NEC 2020 TIA 20-8 Reference: 551.71(F) TIA Log #1474

1. Revise 551.71(F) to read as follows:
551.71(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.
Ground-fault circuit-interrupter protection shall be provided as required in 210.8(B). GFCI protection shall not be
required for other than 125-volt, 15- and 20-ampere receptacles used in the recreational vehicle site equipment.

Informational Note No. 1: Appliances used within the recreational vehicle can create leakage current levels at the
supply receptacle(s) that could exceed the limits of a Class A GFCI device.
Informational Note No. 2: The definition of Power-Supply Assembly in 551.2 and the definition of Feeder in Article
100 clarifies that the power supply cord to a recreational vehicle is considered a feeder.

(Apologies if this has been discussed before):
I read this TIA as RV 'Parks'. Not residential. Residential being covered in 210.8. So an exterior residential 30a/50a receptacle (for an RV) would require GFCI as well as WR. Again with the WR rating for 50a receptacles not becoming effective until 2026 only applying to RV 'Parks'.

Am I misinterpreting ?

 

[don_resqcapt19]

NEC 2020 TIA 20-8 Reference: 551.71(F) TIA Log #1474

1. Revise 551.71(F) to read as follows:
551.71(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.
Ground-fault circuit-interrupter protection shall be provided as required in 210.8(B). GFCI protection shall not be
required for other than 125-volt, 15- and 20-ampere receptacles used in the recreational vehicle site equipment.

Informational Note No. 1: Appliances used within the recreational vehicle can create leakage current levels at the
supply receptacle(s) that could exceed the limits of a Class A GFCI device.
Informational Note No. 2: The definition of Power-Supply Assembly in 551.2 and the definition of Feeder in Article
100 clarifies that the power supply cord to a recreational vehicle is considered a feeder.

(Apologies if this has been discussed before):
I read this TIA as RV 'Parks'. Not residential. Residential being covered in 210.8. So an exterior residential 30a/50a receptacle (for an RV) would require GFCI as well as WR. Again with the WR rating for 50a receptacles not becoming effective until 2026 only applying to RV 'Parks'.

Am I misinterpreting ?

If you can get your AHJ to agree with Informational Note #2, then a receptacle for an RV supplies a feeder and not a branch circuit and is not subject to the rules in Article 210. The biggest objection is that the installed receptacle could be used for loads other than an RV and those applications would require the GFCI protection required by 210.8(F). As far as the WR requirement, the one in 406.9(A) would apply and that only requires 15 and 20 amp receptacles to be WR in the 2020 code.


If you are using LinK, this does not show as a TIA. It just shows as actual code text. As some date later than the issuance of this TIA, they started so show TIAs, in Link with a "T" in a highlighted circle. This is because, a TIA, is not legally enforceable unless it is adopted using the same process that was used to adopt the actual code.

 

[TwistLock]

Thank you, I was aware of the feeder definition compromise but for the reason you stated about other use (like a kid sticking something into the receptacle) I’m concerned about protecting myself more than nuisance tripping. I have my answer then, it’s up to the AHJ.