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Standard Interpretations
10/21/1986 - Clarification of voltage classification for electric distribution and transmission lines.
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• Standard Number: 1926.550

October 21, 1986

Mr. John D. Easton
Manager - Transmission and
Distribution Engineering
Public Service Electric and
Gas Company
80 Park Plaza
Newark, New Jersey 07101

Dear Mr. Easton:

This is in response to your letter of March 21, 1986, addressed to our Region II, Area Office requesting a clarification of 29 CFR 1926.550. Your letter was forwarded to this office for response.

It is true as indicated in your letter that the wording in 29 CFR 1926.550 (a)(15) refers to the voltage of electric distribution and transmission lines, but does not distinguish between phase-to-phase lines. It is intended that the phase-to-ground voltage be used in applying the standard to grounded systems. For ungrounded systems, of course, the phase-to-phase voltage must be used.

We appreciate your interest in this matter. If I can be of further assistance, please feel free to contact me.

Sincerely,



John B. Miles, Jr., Director
Directorate of Field Operations

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