Always keep water-tanks and water-seals filled with clean water.
Never test the generator or piping for leaks with a flame, and never
apply flame to an outlet from which the burner has been removed.
Never use a lighted match, lamp, candle, lantern or any open light near
the machine.
Failure to observe the above cautions is as liable to endanger life as
property.
9. OUTSIDE GENERATOR HOUSES.--(_a_) Outside generator houses should
not be located within 5 feet of any opening into, nor shall they open
toward any adjacent building, and must be kept under lock and key.
(_b_) The dimensions must be no greater than the apparatus requires
to allow convenient room for recharging and inspection of parts. The
floor must be at least 12 inches above grade and the entire structure
thoroughly weather-proof.
(_c_) Generator houses must be thoroughly ventilated, and any
artificial heating necessary to prevent freezing shall be done by steam
or hot-water systems.
(_d_) Generator houses must not be used for the storage of calcium
carbide except in accordance with the rules relating to that subject
(_vide_ Chapter II.).
_Class B.--Stationary Non-Automatic Apparatus_.
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