Delay connector means a nonelectric short interval delay device for use in delaying blasts which are initiated by detonating cord. Detonating cord means a flexible cord containing a solid core of high explosives. 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 nonelectric instantaneous or delay blasting caps. 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. Escapeway means a passageway by which persons may leave a mine. 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. Title 49 CFR is available for inspection at each Metal and Nonmetal Mine Safety and Health District Office of the Mine Safety and Health Administration, and may be obtained from the U.S. Government Printing Office, Washington, DC 20402. Face or bank means that part of any mine where excavating is progressing or was last done.