Cable sizing earthing conductor Discussion ThreadCable sizing earthing conductor Electrical Advice
Hi all,
Hope you're keeping well
I'm currently wiring a small commercial premises. 3 phas incoming supply, 16sq cables
As it is in an urban area with a busy pedestrian street on both sides of the building I had to drive the earth rod just inside the door of the premises. However it is located about 30m from the distribution board. Could anyone tell me how I would calculate whether I would need to run a 16sq earth cable or if 10sq would be sufficient. I'm conscious if a large fault current were to flow and 10sq being adequate.
Building is also neutralised. Which brings me to my next question. If a premises is neutralised, why the need for an earth rod.
Appreciate any advice here. Thanks
Cable sizing earthing conductor for the original thread on Electricians Forums
Hi all,
Hope you're keeping well
I'm currently wiring a small commercial premises. 3 phas incoming supply, 16sq cables
As it is in an urban area with a busy pedestrian street on both sides of the building I had to drive the earth rod just inside the door of the premises. However it is located about 30m from the distribution board. Could anyone tell me how I would calculate whether I would need to run a 16sq earth cable or if 10sq would be sufficient. I'm conscious if a large fault current were to flow and 10sq being adequate.
Building is also neutralised. Which brings me to my next question. If a premises is neutralised, why the need for an earth rod.
Appreciate any advice here. Thanks
Cable sizing earthing conductor for the original thread on Electricians Forums
