Spare conductors in instrument and telecom cables shall be terminated and left floating at the field
end.
In cabinets all spare conductors shall be marked with terminal number and connected to terminals
linked together by solid terminal links, which shall be connected to the relevant earth bar.
Spare cores in instrument and telecom cables shall be connected to IE earth in supply end only.
If there are no spare terminals left in the cabinet, all spare conductors shall be covered with yellow /
green sleeves and marked with relevant cable number and connected directly to the relevant earth
bar