Hi, this is my first post here.
I have a 3 phase board with a 40amp circuit breaker supplying a single phase board to a small office.
I understand that with the 3 phase board how to get the Ze thats not an issue. How do I test to get my Zs (Zdb) for the single phase board?
Do I link the L&E together in the 3 phase board and then test between L&E on the main breaker for the single phase board? This will give me a Zs then i add this to the R1 + R2
I want to get a reading for my Ze at DB for my sub main board on the EICR
Thanks
I have a 3 phase board with a 40amp circuit breaker supplying a single phase board to a small office.
I understand that with the 3 phase board how to get the Ze thats not an issue. How do I test to get my Zs (Zdb) for the single phase board?
Do I link the L&E together in the 3 phase board and then test between L&E on the main breaker for the single phase board? This will give me a Zs then i add this to the R1 + R2
I want to get a reading for my Ze at DB for my sub main board on the EICR
Thanks