§ 75.703-2 - Approved grounding mediums.

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§ 75.703-2 Approved grounding mediums.

For purposes of grounding offtrack direct-current machines, the following grounding mediums are approved:

(a) The grounded polarity of the direct-current power system feeding such machines; or,

(b) The alternating current grounding medium where such machines are fed by an ungrounded direct-current power system originating in a portable rectifier receiving its power from a section power center. However, when such a medium is used, a separate grounding conductor must be employed.

                    
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§ 75.703-2 - Approved grounding mediums.

§ 75.703-2 Approved grounding mediums.