I was going by Figure 2.3 in OSG.
Table 4.2 shows that earthing conductors as small as 2.5mm² can be used for local earth not less than 1Ω for a TT supply. With such a local earth, surely the maximum fault current is less than 230A.
Consumer Unit Main Switch
- Thread starter jcapes
- Start date
Table 4.2 shows that earthing conductors as small as 2.5mm² can be used for local earth not less than 1Ω for a TT supply. With such a local earth, surely the maximum fault current is less than 230A.
The words
Mountain
and
Molehill
spring to mind.
Mountain
and
Molehill
spring to mind.
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
Similar threads
