Testing and inspection of construction ground fault circuit interrupters
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February 4, 1992
MEMORANDUM FOR: BYRON R. CHADWICK
REGIONAL ADMINISTRATOR
THROUGH: LEO CAREY, DIRECTOR
OFFICE OF FIELD PROGRAMS
FROM: PATRICIA K. CLARK, DIRECTOR
DIRECTORATE OF COMPLIANCE PROGRAMS
SUBJECT: Magna Electrical Construction Co., Inc. Letter
Requesting Ground Fault Circuit Interrupter Information
This is in response to your November 18 memorandum forwarding the Magna Electrical Construction Company's request for information on OSHA requirements for testing ground fault circuit interrupters (GFCIs) at construction sites. I apologize for the delay in responding to your inquiry.
Section 1926.404(b)(1) does not require GFCIs to be tested. However, 1926.20(b)(2) does require the frequent and regular inspections of equipment. The instructions included with the devices indicate that they should be tested monthly. If an employer can demonstrate, for example, by means of logs or procedures, that he or she tests GFCIs monthly and promptly replaces those found defective, then a serious citation may not be appropriate for defective GFCIs found upon inspection, provided the faulty devices are replaced promptly.
In regard to Magna's remaining two questions concerning the proper procedures for testing GFCIs, I have attached the Electrical/Electronic Technical Note 91-1 which outlines the acceptable test procedure.
[Attached technical note not reproduced on OSHA's page.]
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