30 CFR § 18.36
Cables between machine components.
(a) Cables between machine components shall have: (1) Adequate
current-carrying capacity for the loads involved, (2) short-circuit
protection, (3) insulation compatible with the impressed voltage, and (4)
flame-resistant properties unless totally enclosed within a flame-resistant
hose conduit or other flame-resistant material.
(b) Cables between machine components shall be: (1) Clamped in place
to prevent undue movement, (2) protected from mechanical damage by position,
flame-resistant hose conduit, metal tubing, or troughs (flexible or threaded
rigid metal conduit will not be acceptable), (3) isolated from hydraulic
lines, and (4) protected from abrasion by removing all sharp edges which they
(c) Cables (cords) for remote-control circuits extending from
permissible equipment will be exempted from the requirements of conduit
enclosure provided the total electrical energy carried is intrinsically safe
or that the cables are constructed with heavy jackets, the sizes of which
are stated in Table 6 of Appendix
I. Cables (cords) provided with hose-conduit protection
shall have a tensile strength not less than No. 16 (AWG) three-conductor,
type SO cord. (Reference: 7.7.7 IPCEA Pub. No. S-19-81, Fourth Edition.)
Cables (cords) constructed with heavy jackets shall consist of conductors not
smaller than No. 14 (AWG) regardless of the number of conductors.
For More Information:
See MSHA's Program Policy Manual