General-Use Switch - see definition for Switch.
Gradient, Voltage - The voltage drop, or electrical difference, between two given points.
Ground - A connection to earth obtained by a grounding electrode.
Ground Counterpoise - a conductor installed over (airport) lighting cables for the purpose of interconnecting the system ground electrodes and providing lightning protection for the cables.
Ground Fault - Any undesired current path from a point of differing potential to ground.
Ground Fault Circuit Interrupter - A device whose function is to interrupt, within a predetermined time, the electrical circuit to the load when a current to ground exceeds some predetermined value that is less than that required to operate the overcurrent protective device of the supply circuit.
Grounding - A 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.
Grounding Conductor - The conductor used to connect the service equipment or system to the grounding electrode.
Grounding Electrode - A buried metal water-piping system, or metal object or device buried in, or driven into, the ground so as to make intimate contact therewith, to which a grounding conductor is electrically and mechanically connected.
Grounded - Connected effectually with the general mass of the earth through a grounding path of sufficiently low impedance and having an ampacity sufficient at all times, under the most severe conditions which are liable to arise in practice, to prevent any current in the grounding conductor from causing a harmful voltage to exist:
Grounding System - All conductors, clamps, ground clips, ground plates or pipes, and ground electrodes by means of which the electrical installation is grounded.
Guarded - Means covered, shielded, fenced, enclosed, or otherwise protected by means of suitable covers or casings, barriers, rails or screens, or mats or platforms to remove the liability of dangerous contact or approach by persons or objects.
|Source: Canadian Electrical Code and National Electrical Code|