HARRY HUGHES, Governor

1355

[(i)] (E) "Drift" means a horizontal passageway,
level, or gangway, driven from the surface outcrop into the
coal bed.

[(j) "Duty as applied to a machine or device" means
the particular service in which the machine or device is
being employed or intended to be employed.

(k) "Electric circuit" means every conductor,
including ground returns, furnishing energy to or receiving
energy from electric apparatus.

(1) "Electric system" means any apparatus and circuit
receiving electric energy or that may receive electric
energy from a common source. Where the source of power is
under control of the mine, it is considered a part of the
electric system. If power is obtained from a central station
not under control of the mine, the term refers only to that
part of the system which is under control of the mine.]

[(m)] (F) "Entry" means a passageway in a coal bed
which is approximately level and is used for haulage,
traveling way, or ventilation. In a dipping bed, entries on
the strike are known as "levels" or "gangways" and to the
dip are known as "slopes."

[(n)] (G) "Excavations and workings" includes any
excavated portion of a mine, whether abandoned or being
worked. The term also includes any underground workings,
shafts, tunnels and other ways and openings including those
being sunk or driven, together with roads, appliances,
machinery, and material connected with them below the
surface.

[(o)] (H) "Face" means the advancing breast of a mine
working place, either of an entry or room.

[(p) "Gas" is used in the sense ordinarily employed by
miners, to mean "fire damp," and inflammable gas, chiefly
composed of methane, sometimes accompanied by ethane (C2H2)
in case of leakage of natural gas, and explosive when mixed
with air in certain proportions.]

[(g)] (I) "Gassy mine" means a mine or portion of a
mine in which methane is found by an approved or permissible
flame safety lamp, detector, or device, or by air analysis
in an amount of 0.25 percent or more. Once a mine is
determined to be a gassy mine, it is always so considered.
In this title, the words "gassy" and "gaseous" are
synonymous.

[(r) "Grounding" means the establishment of an
effective electric connection between the object grounded
and the earth, whether the object grounded is a machine
frame, cable armor, or an electric system.