(1) Electrical equipment and wiring for use in ammonia installations must be general purpose or weather resistant as appropriate.
(2) Where concentrations of ammonia in the air in excess of 16% by volume are likely to be encountered, electrical equipment and wiring must be specified by and installed according to chapter
296-307 WAC Part T, for Class I, Group D locations.
[Statutory Authority: RCW
49.17.010,
49.17.040,
49.17.050, and
49.17.060. WSR 20-21-091, § 296-307-40039, filed 10/20/20, effective 11/20/20. Statutory Authority: RCW
49.17.040. WSR 98-24-096, § 296-307-40039, filed 12/1/98, effective 3/1/99. WSR 97-09-013, recodified as § 296-307-40039, filed 4/7/97, effective 4/7/97. Statutory Authority: RCW
49.17.040, [49.17.]050 and [49.17.]060. WSR 96-22-048, § 296-306A-40039, filed 10/31/96, effective 12/1/96.]