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A lesson learned on yesterday's job !
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<blockquote data-quote="Revved Up Sparky" data-source="post: 446273" data-attributes="member: 5050"><p>The IT guy who was called out said that the UPSes are supposed to last for 20 mins but I did'nt think I'd had the circuit off that long . The generators would have kicked in had there been a proper power cut. My understanding was that the UPSes are just designed to keep the server going until changeover to generator power.</p><p></p><p>When I reset the 32A MCB it had to cope with the flat UPSes and gave a loud crack and that was the end of it- the MCB was finished. The ring main had 2 x 16A UPSes on it along with 2 large offices (plus the main intruder alarm for the hospital) AND all this was also protected by a 100ma RCD !. I will recommend 2 new circuits be run, one for the server room and another for the intruder alarm- both on non - RCD circuits.</p></blockquote><p></p>
[QUOTE="Revved Up Sparky, post: 446273, member: 5050"] The IT guy who was called out said that the UPSes are supposed to last for 20 mins but I did'nt think I'd had the circuit off that long . The generators would have kicked in had there been a proper power cut. My understanding was that the UPSes are just designed to keep the server going until changeover to generator power. When I reset the 32A MCB it had to cope with the flat UPSes and gave a loud crack and that was the end of it- the MCB was finished. The ring main had 2 x 16A UPSes on it along with 2 large offices (plus the main intruder alarm for the hospital) AND all this was also protected by a 100ma RCD !. I will recommend 2 new circuits be run, one for the server room and another for the intruder alarm- both on non - RCD circuits. [/QUOTE]
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A lesson learned on yesterday's job !
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