---
kind: "section"
citation: "30 C.F.R. § 77.804"
title: "30"
number: "77.804"
heading: "High-voltage trailing cables; minimum design requirements."
url: "https://uscodex.org/cfr/30/77.804"
---

# §77.804. High-voltage trailing cables; minimum design requirements.

- (a) High-voltage trailing cables used in resistance grounded systems shall be equipped with metallic shields around each power conductor with one or more ground conductors having a total cross-sectional area of not less than one-half the power conductor, and with an insulated conductor for the ground continuity check circuit. External ground check conductors may be used if they are not smaller than No. 8 (AWG) and have an insulation rated at least 600 volts.
- (b) All such high-voltage trailing cables shall be adequate for the intended current and voltage. Splices made in such cables shall provide continuity of all components.

## Notes

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 36 FR 9364, May 22, 1971, unless otherwise noted.