extremely high temperature electrical discharge produced by an electrical fault in the air that occurs on live equipment resulting from a low impedance connection to ground or another voltage phase in an electrical system. The intensity of the discharge is dependent on the size of the energy source and the orientation and size of the conductors
bonding
low impedance path obtained by permanently joining all non-current-carrying metal parts to assure electrical continuity and having the capacity to conduct safely any current likely to be imposed on it
cable
a complete manufactured assembly of one or more insulated conductors, optical fibres, or both which may have fillers, strength members, and insulating and protective material, and may also have a continuous overall covering providing a degree of electrical, mechanical and environmental protection to the assembly
cathodic protection
protection technique to control the corrosion of a metal surface by making that surface the cathode of an electrochemical cell
commissioning
initial startup of new equipment systematically to OEM specifications
dip switches
a group of miniature switches
extra-low-voltage
any voltage up to and including 30 V AC or 42.4 V DC as per CEC
grounding
permanent and continuous conductive path to the earth with sufficient ampacity to carry any fault current liable to be imposed on it, and of a sufficiently low impedance to limit the voltage rise above ground and to facilitate the operation of the protective devices in the circuit
high-voltage
any voltage exceeding 1 000 V AC or 1 060 V DC as per CEC
low-voltage
any voltage exceeding 30 V AC but not exceeding 1 000 V AC or exceeding 42.4 V DC but not exceeding 1 060 V DC as per CEC
raceway
any channel designed for holding wires, cables, or busbars, and, unless otherwise qualified by rules of the CEC, the term includes conduit (rigid, flexible, metal, non-metallic), electrical, metallic and nonmetallic (EMT and ENT) underfloor raceways, cellular floors, surface raceways, wireways, cable trays, busways, and auxiliary gutters
unit equipment
a piece of equipment with its own storage battery, charging means, transfer switch, lamps or output terminals, test switch and indicators