Detonator means any device containing a detonating charge that is used to initiate an explosive and includes but is not limited to blasting caps, electric blasting caps and non-electric instantaneous or delay blasting caps. Distribution box means a portable apparatus with an enclosure through which an electric circuit is carried to one or more cables from a single incoming feed line, each cable circuit being connected through individual overcurrent protective devices. Electric blasting cap means a detonator designed for and capable of being initiated by means of an electric current. Electrical grounding means to connect with the ground to make the earth part of the circuit. Employee means a person who works for wages or salary in the service of an employer.
Employer means a person or organization which hires one or more persons to work for wages or salary.
Explosive means any substance classified as an explosive by the Department of Transportation in 49 CFR 173.53, 173.88 and 173.100 which are incorporated by reference. Face or bank means that part of any mine where excavating is progressing or was last done. Flammable means capable of being easily ignited and of burning rapidly. Flash point means the minimum temperature at which sufficient vapor is released by a liquid or solid to form a flammable vapor-air mixture at atmospheric pressure. Highway means any public street, public alley, or public road.