Hi all,
I'm putting a new shower in my own place, 10Kw electric unit. Have made the run from the shower-room isolator using 10mm2 cable, now working out the best way to wire it in to the consumer unit. It's a Memera 2000 AD and the layout is a 100A main isolator with 6 6A MCB lighting circuits directly off it, then a 80A RCD protected second section with 3 32A MCB circuits (two socket rings and a cooker). There is one spare MCB slot (in the middle - so could wire in either side).
RCBOs for this unit are quite hard to come by so my first instinct is to put a new 45A MCB off the RCD side of the unit. Doing a few calcs I estimated that worst case, with the shower, oven, washing machine and kettle all going I might be pushing around 88A, so I reasoned that keeping it on the 80A RCD side would be advantageous, in that if the load did become too high, the RCD would trip but not the main breaker so at least the lights would stay on.
Then my brain kicked in and said - hold on, RCDs don't actually act as over-current protection devices do they? So would it actually be more dangerous to 'overload' the RCD like this, than to put the shower on the main section with an RCBO?
Does anyone know of other manufacturers RCBOs that form-fit the Memera 2000 AD?
Cheers.
I'm putting a new shower in my own place, 10Kw electric unit. Have made the run from the shower-room isolator using 10mm2 cable, now working out the best way to wire it in to the consumer unit. It's a Memera 2000 AD and the layout is a 100A main isolator with 6 6A MCB lighting circuits directly off it, then a 80A RCD protected second section with 3 32A MCB circuits (two socket rings and a cooker). There is one spare MCB slot (in the middle - so could wire in either side).
RCBOs for this unit are quite hard to come by so my first instinct is to put a new 45A MCB off the RCD side of the unit. Doing a few calcs I estimated that worst case, with the shower, oven, washing machine and kettle all going I might be pushing around 88A, so I reasoned that keeping it on the 80A RCD side would be advantageous, in that if the load did become too high, the RCD would trip but not the main breaker so at least the lights would stay on.
Then my brain kicked in and said - hold on, RCDs don't actually act as over-current protection devices do they? So would it actually be more dangerous to 'overload' the RCD like this, than to put the shower on the main section with an RCBO?
Does anyone know of other manufacturers RCBOs that form-fit the Memera 2000 AD?
Cheers.