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 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 which may also include optical fibres, fillers, strength members, insulating and protective material, having a continuous overall covering providing 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
dip switches
a group of miniature switches
commissioning
initial startup of new equipment systematically to OEM specifications
extra low voltage
any voltage up to and including 30 volts, 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 750 volts, as per CEC
low voltage
any voltage exceeding 30 volts but not exceeding 750 volts, 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 tubing (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
