Standard Interpretations - (Archived) Table of Contents|
July 31, 1984
Mr. Peter J. Schram
Chief Electrical Engineer
National Electrical Code
National Fire Protection Association
Battery March Park
Quincy, Massachusetts 02269
Dear Mr. Schram:
This is in response for an interpretation of cord sets (extension cords) plugged into permanent wiring at construction sites to supply portable electrical hand tools.
Section 305-4(a) of the code requires all 125-volts single-phase, 15 and 20 amperes receptacle outlets which are not a part of the permanent wiring of the building or structure and which are in use by employees shall have ground-fault circuit-interrupter protection for personnel.
I have been advised by my staff that cord sets (extension cords) plugged into permanent wiring at construction sites are temporary wiring and as such require ground-fault protection for personnel on construction sites.
You assistance in this matter will be appreciated.
John B. Miles, Jr.,
Directorate of Field Operations
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