
TWO
Earthing
[Relevant chapters and parts
Chapters 31, 33, 41, 47, 53, 54, 55, Part 6]
Definitions used in this chapter
Bonding conductor A protective conductor providing equipot-
ential bonding.
Circuit
protective conductor A protective conductor connecting
exposed conductive parts of equipment to the main earthing
terminal.
Direct contact Contact of persons or livestock with live parts
which may result in electric shock.
Earth The conductive mass of earth, whose electric potential at
any point is conventionally taken as zero.
Earth
electrode resistance
The resistance of an earth electrode to
earth.
Earth fault
loop impedance
The impedance