30 CFR § 7.402 - Definitions.
The following definitions apply in this subpart.
Conductor. A bare or insulated wire or combination of wires not insulated from one another, suitable for carrying an electric current.
Jacket. A nonmetallic abrasion-resistant outer covering of a cable or splice.
Power Conductor. An insulated conductor of a cable assembly through which the primary electric current or power is transmitted.
Signaling Cable. A fiber optic cable, or a cable containing electric conductors of a cross-sectional area less than #14 AWG used where the circuit cannot deliver currents which would increase conductor temperatures beyond that established for the current-carrying capacity of the conductors.