You must make sure all electrical wiring and equipment in the vapor area is approved for areas that have:
(1) Deposits of easily ignited residue;
(2) Explosive vapor.
Exemption: This does not apply to wiring that is:
1. In rigid conduit, threaded boxes or fittings;
2. Has no taps, splices, or terminal connections.
[Statutory Authority: RCW
49.17.010,
49.17.040,
49.17.050, and
49.17.060. WSR 17-18-075, § 296-835-12045, filed 9/5/17, effective 10/6/17. Statutory Authority: RCW
49.17.010, [49.17].040, and [49.17].050. WSR 02-15-102, § 296-835-12045, filed 7/17/02, effective 10/1/02.]