Wash. Admin. Code § 296-24-37005 - Electrical and other sources of ignition
(1)
Conformance. All electrical
equipment, open flames and other sources of ignition must conform to the
requirements of this section, except as follows:
(b) Drying, curing, and fusion apparatus must
conform to the requirements of WAC
296-24-37019.
(c) Automobile undercoating spray operations
in garages must conform to the requirements of WAC
296-24-37021.
(d) Powder coating equipment must conform to
the requirements of WAC
296-24-37023.
(2)
Minimum
separation. You must ensure that there is no open flame or spark
producing equipment in any spraying area nor within 20 feet thereof, unless
separated by a partition.
(3)
Hot surfaces. You must not locate space-heating appliances,
steampipes, or hot surfaces in a spraying area where deposits of combustible
residues may readily accumulate.
(4)
Wiring conformance.
Electrical wiring and equipment must conform to the provisions of this section
and chapter 296-24 WAC Part L.
(5)
Combustible residues, areas. Unless specifically approved for
locations containing both deposits of readily ignitable residue and explosive
vapors, there must be no electrical equipment in any spraying area, whereon
deposits of combustible residues may readily accumulate, except wiring in rigid
conduit or in boxes or fittings containing no taps, splices, or terminal
connections.
(6)
Wiring type
approved. Electrical wiring and equipment not subject to deposits of
combustible residues but located in a spraying area as herein defined must be
of explosion-proof type approved for Class I, Group D locations and conform to
the provisions of chapter 296-24 WAC Part L, for Class I, Division 1, hazardous
locations. Electrical wiring, motors, and other equipment outside of but within
20 feet of any spraying area, and not separated therefrom by partitions, must
not produce sparks under normal operating conditions and conform to the
provisions of chapter 296-24 WAC Part L for Class I, Division 2, hazardous
locations.
(7)
Lamps.
Electric lamps outside of, but within 20 feet of any spraying area, and not
separated therefrom by a partition, must be totally enclosed to prevent the
falling of hot particles and you must protect them from mechanical injury by
suitable guards or by location.
(8)
Portable lamps. You must not use portable electric lamps in any
spraying area during spraying operations. Portable electric lamps, if used
during cleaning or repairing operations, must be of the type approved for
hazardous Class I locations.
(9)
Grounding.
(a) You must properly
electrically ground all metal parts of spray booths, exhaust ducts, and piping
systems conveying flammable liquids or liquids with a flashpoint greater than
199.4°F (93°C) or aerated solids in an effective and permanent
manner.
(b) "Airless" high-fluid
pressure spray guns and any conductive object being sprayed should be properly
electrically grounded.
Notes
Statutory Authority: Chapter 49.17 RCW. 91-24-017 (Order 91-07), § 296-24-37005, filed 11/22/91, effective 12/24/91. Statutory Authority: RCW 49.17.040 and 49.17.050. 85-10-004 (Order 85-09), § 296-24-37005, filed 4/19/85; Order 76-6, § 296-24-37005, filed 3/1/76; Order 73-5, § 296-24-37005, filed 5/9/73 and Order 73-4, § 296-24-37005, filed 5/7/73.
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