animals coming in contact therewith.


[=Wires opposite rooms and refuge holes.=] All trolley and positive
feed wires shall be placed on opposite side of track from refuge
holes or necks of rooms.


[=Bare wires; when not to extend into working places.=] No trolley
wire shall be extended into or maintained in any room while being
used as a working place; no trolley or feed wire shall be extended
into any entry beyond the outside corner of the last breakthrough.


[=Switches and circuit-breakers.=] Switches or circuit-breakers
shall be provided to control the current at the mine, and at all
important points in the mine.


[=Machine feed wires and insulators.=] All machine feed wires shall
be placed as near the rib and roof or cross-timbers as practicable;
the positive wire to be carried not to exceed three inches from the
rib and roof or cross-timbers, measured at the insulators, which
shall be so placed as to keep the wire at least six inches outside
of the track rail on the side the wire is located. Insulators shall
be placed not exceeding fifty feet apart, and all wires shall be
carried so that same will be not less than six inches outside of the
track rail at any point on the side the wire is located. All
positive wires shall be carried on glass or porcelain insulators, or
insulators equally efficient. All negative wires shall be carried on