RCDD · Question #112
An isolated ground receptacle may be identified by:
The correct answer is E. Either A or C. Isolated ground receptacles are visually identified by their distinctive orange coloring - either as a solid orange body or as a beige body with an orange triangle on the face - per NEC requirements.
Question
An isolated ground receptacle may be identified by:
Options
- ABeige coloring with an orange triangle on the face
- BThe letters IG
- CContinuous orange coloring
- DIts proximity to the PDU
- EEither A or C
How the community answered
(26 responses)- A15% (4)
- B8% (2)
- C4% (1)
- E73% (19)
Why each option
Isolated ground receptacles are visually identified by their distinctive orange coloring - either as a solid orange body or as a beige body with an orange triangle on the face - per NEC requirements.
The letters 'IG' are a common field abbreviation but are not the NEC-specified method of identification - the code requires the orange triangle marking, not a text label.
Physical proximity to a power distribution unit is an installation practice and not a defined or reliable method of identifying an isolated ground receptacle.
NEC Article 406.3(D) requires isolated ground receptacles to be identified by an orange triangle on the face, and the device body itself may be orange in color, making both the orange triangle on a beige face and the continuous orange coloring valid identifying marks. Either marking correctly indicates that the grounding terminal is isolated from the yoke or strap to reduce electrical noise. Both options A and C are therefore correct identifiers under the code.
Concept tested: Isolated ground receptacle identification per NEC 406
Source: https://www.nfpa.org/codes-and-standards/nfpa-70-standard-for-electrical-code/70
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