30 CFR § 7.62
The following definitions apply in this subpart:
A circuit that includes one or more electric
detonators connected in a single series and the firing cable used to connect
the detonators to the blasting unit.
An electric device used to initiate electric
Operation of the unit according to the
manufacturer's instructions with fully-charged batteries, with electric
components at any value within their specified tolerances, and with
adjustable electric components set to any value within their range.