MARVIN MANDEL, Governor                                2871

(1)   On the opposite side of the entry from any
shelter hole or clearance space, except where six and
one—half feet or more above the rail or at adequately
guarded shelter holes;

(2)   The hanger on each curve shall be spaced so the
trolley wire can be detached at any one hanger without
exposing the locomotive operator to a shock hazard;

(3)   Trolley wires and trolley feeder wires shall be
aligned properly and installed at least [six] 6 inches
outside the trackage line;

(4)    Cutout switches shall be provided at intervals
of not more than 2,000 feet and near the beginning of
each branch line;

(5)    Wires shall be kept taut and not permitted to
touch the roof, rib, or crossbars; particular care shall
be taken where the wire passes through a door opening to
preclude the possibility of bare wire coding in contact
with combustible material;

(6)   Trolley wires and trolley feeder wires shall be
guarded adequately where necessary for employees to pass
or work under them regularly. The wires shall be guarded
adequately unless they are more than six and one-half
feet above the top of the rail. The wires also shall be
guarded adequately on both sides of every door;

(7)   The wires may not extend beyond the last open
crosscut and shall be kept at least 150 feet from pillar
workings;

(8)   Wires shall be anchored securely and insulated
properly at the ends; and

(9)    Wires shall not be installed in air known to
contain at least (one] 1 percent methane, or in air
returning from pillar recovery work, or old workings
where dangerous amounts of methane may be liberated
suddenly.

7-445.

(a) If any working place is being driven towards,
or is in supposedly dangerous proximity to, an abandoned
mine suspected of containing explosive gas or which may
contain a dangerous accumulation of water, a borehole
shall be kept not less than 12 feet in advance of the
face and on the sides of the working place. The side
holes shall be driven diagonally at intervals not
exceeding (eight] 8 feet. A working place driven to tap
water or gas may not be more than [ten] 10 feet wide.