AVSparky
Member
- Location
- Los Angeles County, CA
I have a copier manufacturer requiring less than 2 Volts between neutral and ground at the receptacle. Receptacle is dedicated and only 1.5 volts between ground and neutral with no load. When copier makes copy it jumps to 7 Volts. Tech tells me this is unacceptable and causes copier to malfunction. I have tried Iso ground receptacle and regular. Also tried only using the conduit (EMT) as only ground path. I checked connections in sub panel and tested between ground and neutral buss. No voltage difference at panel busses, even when copier makes copy. I did find a 25 Volt reading between Ground conductor and Ground Buss when removed and nothing plugged in at receptacle. It appears to be inductance from phase conductor and disappears when breaker is off. Is this normal. Any ideas would be greatly appreciated.