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I'm not an electrician or electrical engineer, but if I understand earlier threads correctly the worst case scenario may be to have multiple (grounded?) power supplies plugged into different GPOs? If there were all off the same powerboard going to same GPO, likely to be ok?
I'm running my QHY9 off a big battery at the moment Peter after the problems I had last year. Hasn't missed a beat so far, although it's probably overkill. Now I think back though, my problems may have co-incided with laptop (and USB devices) powered from inside the house and QHY9 powered from plug outside the house.
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