Gapless - Possessing no gaps, series or parallel, as in "gapless arrester".
Gapped MOV - An arrester construction type that refers to grading resistor gaps in series with a column of metal oxide varistor blocks; CPS's VariGAP® arrester is considered a gapped MOV construction (refer to VariGAP.)
Gradient, Voltage - The voltage drop, or electrical difference, between two given points.
Ground Fault - Any undesired current path from a point of differing potential to ground.
Grounds or Grounding - Connecting one side or neutral of a circuit to the earth through low resistance or low impedance paths, to help prevent transmitting shocks to personnel.