30 CFR §75.827

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