30 CFR § 75.103-2
Requirements for movement of off-track mining equipment in areas of active workings where energized trolley wires or trolley feeder wires are present; pre-movement requirements; certified and qualified pers
(a) Prior to moving or transporting any unit of off-track mining
equipment in areas of the active workings where energized trolley wires or
trolley feeder wires are present:
(1) The unit of equipment shall be examined by a certified
person to ensure that coal dust, float coal dust, loose coal oil, grease, and
other combustible materials have been cleaned up and have not been permitted
to accumulate on such unit of equipment; and,
(2) A qualified person, as specified in §75.153 of this part, shall examine the trolley wires, trolley feeder
wires, and the associated automatic circuit interrupting devices provided for
short circuit protection to ensure that proper short circuit protection
exists.
(b) A record shall be kept of the examinations required by paragraph
(a) of this section, and shall be made available, upon request, to an
authorized representative of the Secretary.
(c) Off-track mining equipment shall be moved or transported in areas
of the active workings where energized trolley wires or trolley feeder wires
are present only under the direct supervision of a certified person who shall
be physically present at all times during moving or transporting
operations.
(d) The frames of off-track mining equipment being moved or
transported, in accordance with this section, shall be covered on the top and
on the trolley wire side with fire-resistant material which has met the
applicable requirements of Part 18 of Subchapter D
of this chapter (Bureau of Mines Schedule 2G).
(e) Electrical contact shall be maintained between the mine track and
the frames of off-track mining equipment being moved in-track and trolley
entries, except that rubber-tired equipment need not be grounded to a
transporting vehicle if no metal part of such rubber-tired equipment can
come into contact with the transporting vehicle.
(f) A minimum vertical clearance of 12 inches shall be maintained
between the farthest projection of the unit of equipment which is being moved
and the energized trolley wires or trolley feeder wires at all times during
the movement or transportation of such equipment; provided, however, that if
the height of the coal seam does not permit 12 inches of vertical clearance
to be so maintained, the following additional precautions shall be taken:
(1)(i) Except as provided in paragraph (f)(1)(ii) of this
section electric power shall be supplied to the trolley wires or trolley
feeder wires only from outby the unit of equipment being moved or
transported. (ii) Where direct current electric power is used and such
electric power can be supplied only from inby the equipment being moved or
transported, power may be supplied from inby such equipment provided a miner
with the means to cut off the power, and in direct communication with persons
actually engaged in the moving or transporting operation, is stationed outby
the equipment being moved.
(2) The settings of automatic circuit interrupting devices
used to provide short circuit protection for the trolley circuit shall be
reduced to not more than one-half of the maximum current that could flow if
the equipment being moved or transported were to come into contact with the
trolley wire or trolley feeder wire;
(3) At all times the unit of equipment is being moved or
transported, a miner shall be stationed at the first automatic circuit
breaker outby the equipment being moved and such miner shall be: (i) In
direct communication with persons actually engaged in the moving or
transporting operation, and (ii) capable of communicating with the
responsible person on the surface required to be on duty in accordance with
§75.1600-1 of this part;
(4) Where trolley phones are utilized to satisfy the
requirements of paragraph (f)(3) of this section, telephones or other
equivalent two-way communication devices that can readily be connected with
the mine communication system shall be carried by the miner stationed at the
first automatic circuit breaker outby the equipment being moved and by a
miner actually engaged in the moving or transporting operation; and,
(5) No person shall be permitted to be inby the unit of
equipment being moved or transported, in the ventilating current of air that
is passing over such equipment, except those persons directly engaged in
moving such equipment.
(g) The provisions of paragraphs (a) through (f) of this section
shall not apply to units of mining equipment that are transported in mine
cars, provided that no part of the equipment extends above or over the sides
of the mine car.
[38 FR 29998, Oct. 31, 1973, as amended at 47 FR 14706, Apr. 6, 1982; 60 FR
33719, June 29, 1995]
Subpart L--Fire Protection