Common Earthing Arrangements Flashcards
1
Q
Which 3 earthing systems are most commonly used in the uk
A
TT
TN C S
TN S
2
Q
What is the maximum value for ze for each of the earthing systems
A
TN S- 0.8
TN C S - 0.35
TT - 200
3
Q
Which earthing system needs the consumer to provide an earth via an earthing rod
A
TT system
4
Q
What is a PEN conductor
A
The combined earth/neutral conductor
5
Q
What additional protective device is normally required when a TT system is used
A
RCD
