Protective earth (PE)
Earth conductors shall be colored yellow / green.
The braid armour shall be covered with sleeves, colored yellow / green.
PE bars shall be marked yellow / green.
Instrument earth (IE)
The IE screen shall be covered with sleeves, colored yellow / green:
IE bars shall be marked yellow / green and with:A red mark for bars containing non-IS cables
only.
A blue mark for bars containing IS cables only.
Both red and blue mark containing non-IS and IS cables.
Bonding
Static earth conductors shall be colored yellow / green.