§ 866. — Trailing cables.
[Laws in effect as of January 24, 2002]
[Document not affected by Public Laws enacted between
January 24, 2002 and December 19, 2002]
[CITE: 30USC866]
TITLE 30--MINERAL LANDS AND MINING
CHAPTER 22--MINE SAFETY AND HEALTH
SUBCHAPTER III--INTERIM MANDATORY SAFETY STANDARDS FOR UNDERGROUND COAL
MINES
Sec. 866. Trailing cables
(a) Requirements established for flame resistant cables
Trailing cables used in coal mines shall meet the requirements
established by the Secretary for flame-resistant cables.
(b) Circuit breakers; markings and visual observation of position of
disconnection devices
Short-circuit protection for trailing cables shall be provided by an
automatic circuit breaker or other no less effective device approved by
the Secretary of adequate current-interrupting capacity in each
ungrounded conductor. Disconnecting devices used to disconnect power
from trailing cables shall be plainly marked and identified and such
devices shall be equipped or designed in such a manner that it can be
determined by visual observation that the power is disconnected.
(c) Distribution center junctions; safety connections
When two or more trailing cables junction to the same distribution
center, means shall be provided to assure against connecting a trailing
cable to the wrong size circuit breaker.
(d) Temporary splices; usable period; exceptions; quality
One temporary splice may be made in any trailing cable. Such
trailing cable may only be used for the next twenty-four hour period. No
temporary splice shall be made in a trailing cable within twenty-five
feet of the machine, except cable reel equipment. Temporary splices in
trailing cables shall be made in a workmanlike manner and shall be
mechanically strong and well insulated. Trailing cables or hand cables
which have exposed wires or which have splices that heat or spark under
load shall not be used. As used in this subsection, the term ``splice''
means the mechanical joining of one or more conductors that have been
severed.
(e) Permanent splices; quality
When permanent splices in trailing cables are made, they shall be--
(1) mechanically strong with adequate electrical conductivity
and flexibility;
(2) effectively insulated and sealed so as to exclude moisture;
and
(3) vulcanized or otherwise treated with suitable materials to
provide flame-resistant qualities and good bonding to the outer
jacket.
(f) Clamping of cables
Trailing cables shall be clamped to machines in a manner to protect
the cables from damage and to prevent strain on the electrical
connections. Trailing cables shall be adequately protected to prevent
damage by mobile equipment.
(g) Making and breaking of connections to junction boxes
Trailing cable and power cable connections to junction boxes shall
not be made or broken under load.
(Pub. L. 91-173, title III, Sec. 306, Dec. 30, 1969, 83 Stat. 779.)
Section Referred to in Other Sections
This section is referred to in section 861 of this title.
