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Standard Interpretations
09/24/1987 - Clarification of revised Subpart K, Electrical Standard for Construction, 1926.403(a).
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• Standard Number: 1926.403(a)

September 24, 1987 

MEMORANDUM FOR:  ALL REGIONAL ADMINISTRATORS

FROM:            THOMAS J. SHEPICH, Director
                 Directorate of Compliance Programs

THRU:            LEO CAREY, Director
                 Office of Field Programs

SUBJECT:         Clarification of 29 CFR 1926.403(a)
In the revised Subpart K, Electrical Standards for Construction the language of the requirement for approval in 1926.403(a) differs from the wording given in Subpart S, Electrical Standards for General Industry, 1910.303(a). However, while different language was used in Subpart K, no difference in the implementation of the requirement was intended.

In both standards, Subpart K and Subpart S, the definition of "approved" leads to the definition of "acceptable," which provides for acceptance of electric equipment based in testing by a laboratory (among other means of acceptance). The Subpart K requirement for approval is not intended to expand equipment testing beyond what has taken place under Subpart S.

In determining the acceptability of electric equipment that is of a type that has not historically been tested by a "qualified electrical testing laboratory," OSHA compliance staff must consider the decisions of local authorities responsible for enforcing the National Electrical Code.

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