WAC 296-307-37825. Flammable materials

Where flammable materials are present only occasionally, electric equipment capable of igniting them must not be used, unless measures are taken to prevent hazardous conditions from developing. Such materials include, but are not limited to: Flammable gases, vapors, or liquids; combustible dust; and ignitable fibers or flyings. Note: Electrical installation requirements for locations where flammable materials are present on a regular basis are contained in WAC 296-307-372 .