My CU is a Legrand Split Load board with
100A DP Main Switch (2 module wide) feeding 5 Unprotected MCBs
80A DP RCD (2 module wide) feeding 5 Protected MCBs.
Wanting to improve protection, I had hoped that the 5 unprotected MCBs could be replaced with single module RCBOs but no such luck - the RCBOs are too tall and they would be obstructed by the cables connecting to the neutral terminals above. Basically the CU is not tall enough.
I don't want to lose any of the 5 + 5 MCB capacity.
So the question is, what is the best/economic/allowable solution?
- replace the DP Main Switch in the CU with a DP RCD so that the unprotected MCBs are then protected?
- as above, but with a new separate main isolating switch (can easily be mounted on side of meter cupboard)?
Regarding the latter, does anyone know whether Central Networks or their meter operator (think it is Siemens) are installing isolating main switches for free on request, because obviously that would help a lot!
100A DP Main Switch (2 module wide) feeding 5 Unprotected MCBs
80A DP RCD (2 module wide) feeding 5 Protected MCBs.
Wanting to improve protection, I had hoped that the 5 unprotected MCBs could be replaced with single module RCBOs but no such luck - the RCBOs are too tall and they would be obstructed by the cables connecting to the neutral terminals above. Basically the CU is not tall enough.
I don't want to lose any of the 5 + 5 MCB capacity.
So the question is, what is the best/economic/allowable solution?
- replace the DP Main Switch in the CU with a DP RCD so that the unprotected MCBs are then protected?
- as above, but with a new separate main isolating switch (can easily be mounted on side of meter cupboard)?
Regarding the latter, does anyone know whether Central Networks or their meter operator (think it is Siemens) are installing isolating main switches for free on request, because obviously that would help a lot!