CFR > Title 30 - Mineral Resources > CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR > SUBCHAPTER O—COAL MINE SAFETY AND HEALTH (parts 70 to 90) > PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES > SUBPART I—Underground High-Voltage Distribution (§75.800 to §75.834) > 75.827—Guarding of trailing cables.

75.827—Guarding of trailing cables.

(a) Guarding.
(1) The high-voltage cable must be guarded in the following locations:
(i) From the power center cable coupler for a distance of 10 feet inby the power center;
(ii) From the entrance gland for a distance of 10 feet outby the last strain clamp on the continuous mining machine; and,
(iii) At any location where the cable could be damaged by moving equipment.
(2) Guarding must be constructed using nonconductive flame-resistant material or grounded metal.
(b) Suspended cables and cable crossovers. When equipment must cross any portion of the cable, the cable must be either:
(1) Suspended from the mine roof; or
(2) Protected by a cable crossover having the following specifications:
(i) A minimum length of 33 inches;
(ii) A minimum width of 17 inches;
(iii) A minimum height of 3 inches;
(iv) A minimum cable placement area of two and one half-inches (2 1/2 ″) high by four and one-quarter inches (4 1/4 ″) wide;
(v) Made of nonconductive material;
(vi) Made of material with a distinctive color. The color black must not be used; and
(vii) Made of material that has a minimum compressive strength of 6,400 pounds per square inch (psi).

Code of Federal Regulations

[75 FR 17549, Apr. 6, 2010]