(a) Electrical Work. Wherever flammable or explosive vapors, mists, gases or dusts may be present, all electrical devices and equipment and all wiring shall be of the type prescribed for the hazard in Chapter 3161.
(b) Flames, Sparks and Grounding. No open flame or spark producing device shall be installed or used in any room or space where flammable vapors, mists, gases or dusts may be present, or where flammable or highly combustible substances are used or stored. All motors, machines, mixers, vats, tanks, pumps, filters and other similar pieces of equipment shall be effectively grounded. Except as provided in subsection (c) hereof, all flame sources, including boilers and direct-fired heaters, shall be in separate rooms at an adequate distance and in a suitable location so as not to present a potential source of ignition.
(c) Room and Space Heating Devices.
(1) Wherever flammable or explosive vapors, mists or gases may be present, heating shall be by low pressure steam or hot water or other approved methods deemed safe for the hazard, except that direct- fired unit heaters tested and approved for installation in garages and airplane hangars may be used when installed in conformity with the conditions of approval. For the purposes of this subsection low pressure steam shall be deemed to be five (5) pounds or less. The temperature of hot water used for heating shall not exceed that which corresponds with fifteen (15) pounds gauge.
(2) Highly combustible solids with low ignition temperatures shall be stored and used at a safe distance from radiators, pipes and other parts of heating systems which might cause ignition. Where deemed necessary by the Fire Chief, hot surfaces shall be suitably guarded.
(d) Smoking Prohibited. Smoking shall be prohibited in all buildings or parts of buildings and in all locations where fire or explosion-hazardous substances are stored or handled, and “NO SMOKING” signs shall be prominently displayed, except that the Chief may designate safe areas where smoking may be permitted.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)