What should the code be for a Socket circuit supplying a Data Cabinet/Server up to 32a that has no 30mA RCD protection?
What should the code be for a Socket circuit supplying a Data Cabinet/Server up to 32a that has no 30mA RCD protection?
It is understandable (because of high protective conductor currents, unwanted tripping etc.) why someone would want to omit an RCD for a 32 A socket-outlet that is intended to supply a data/server rack.
Regulation 411.3.3 permits this, provided a risk assessment is in place.
Guidance Note 5 (Section 8.2.3) provides some guidance of what sorts of mitigation ought to be in place where consideration is being given to undertaking a risk assessment to omit an RCD for a socket-outlet ... in this case, whether additional bonding is in place within the data/server rack, and for the data/server rack in the particular room.
It is understandable (because of high protective conductor currents, unwanted tripping etc.) why someone would want to omit an RCD for a 32 A socket-outlet that is intended to supply a data/server rack.
Regulation 411.3.3 permits this, provided a risk assessment is in place.
Guidance Note 5 (Section 8.2.3) provides some guidance of what sorts of mitigation ought to be in place where consideration is being given to undertaking a risk assessment to omit an RCD for a socket-outlet ... in this case, whether additional bonding is in place within the data/server rack, and for the data/server rack in the particular room.
omit an RCD for a 32 A socket-outlet that is intended to supply a data/server rack.
That is fine IF the data/server rack uses an UPS (Uninturupted Power Supply) but a lot don't have a UPS
That is fine IF the data/server rack uses an UPS (Uninturupted Power Supply) but a lot don't have a UPS
That's puzzled me - what's your thinking here? A UPS typically won't provide separation from the mains/earth so not really a substitute for shock protection precautions, nor are they much use against nuisance tripping as they'll only support the loads for a limited time (often only a few tens of minutes) - so likely still things go down before anyone can realise and get to the RCD to reset it (especially out of hours).
- Andy.
That is fine IF the data/server rack uses an UPS (Uninturupted Power Supply) but a lot don't have a UPS
I'm not in agreement ... the presence of the UPS might heighten the need for RCD protection on the UPS output in cases where there is no supplementary earthing in place, because the earth fault path is lost when the plug supplying either the rack or the UPS is removed !
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