I have been looking at BS 7671 AMD 4 recently and a particular standard has got my attention, it is 710.560.6.12 which reads - Where an uninterruptible power system (UPS) is used, it shall conform to BS EN 50171 and the relevant parts of the BS EN [IEC] 62040 series.
I am looking for clarification as to whether this means all UPS within a medical location or whether it is specific to safety services specifically the backing up of a medical IT system, BS EN 62040 I do not think would be an issue for any reputable UPS but BS EN 50171 is a whole different matter as this is relevant to central battery systems serving life safety services such as EM lighting, sprinkler systems etc.
At the moment the way I am reading this is all UPS systems serving medical IT systems in a medical location shall comply with BS EN 50171 because essential medical services fall into life safety systems but if this is correct that is a massive change to UPS systems in medical locations, I can also see that it could mean BS EN 50171 would only apply to a UPS if it is the sole means of backing up a safety service in the absence of a safety source but if so it is not clear at all.
Any help on clarifying this would be great.