How must conduit be installed in hazardous locations?

All conduits must be threaded and wrench-tight. Where it is impractical to make a threaded joint tight, a bonding jumper must be used.

[WSR 97-09-013, recodified as § 296-307-37212, 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-37212, filed 10/31/96, effective 12/1/96.]

PDFWAC 296-307-37212

How must conduit be installed in hazardous locations?