7v ~ 12v returning onto mains power from BackUps-400va/600va
This was originally posted on APC forums on 1/26/2016
I have an electrician doing some electrical work on my home, where I have 2 x BackUps 400va, 2 x BackUps 600va and a few other models installed. All of the BackUps 400va & 600va are returning between 7v to 12v onto the electrical wiring, which was noticed during some testing on the main electrical supply for the property. I tested this with a voltmeter, and on the power-cord for each of the units, there is a varying voltage showing of between 7v to 12v, fluctuating.
Is this normal? The SmartUPS 1500va and BackUps 1500va Pro do not do this.