30 CFR § 75.907
Design of trailing cables for medium-voltage circuits
July 29, 2020
[Statutory Provisions]
Trailing cables for medium-voltage circuits shall include grounding conductors, a ground check conductor, and grounded metallic shields around each power conductor or a ground metallic shield over the assembly, except that on equipment employing cable reels, cables without shields may be used if the insulation is rated 2,000 volts or more.