Jim Port Posted December 18, 2009 Report Share Posted December 18, 2009 'Ground' is the reference point. Marc Correct, if you mean the center point of the transformer. This agrees with what I said. If you measure between two points on the same plane there is no difference. Try to measure voltage between the 2 screws of a single pole switch. you will not get a reading. Does this mean that there is no voltage? No it it just that there is no difference of potential between them. Without a reference you do not have a way to measure voltage. Ground could be at 500 volts and a hot leg at 620. All the sytem sees is that there is a difference of potential of 120 volts. Quote Link to comment Share on other sites More sharing options...
electures Posted December 24, 2009 Report Share Posted December 24, 2009 I believe this sub panel is feeding an in-ground pool. Should I be concerned about the lack of grounding & neutral wires going out? Click to Enlarge 52.4 KB Is that panel supplied by flexible cord? Quote Link to comment Share on other sites More sharing options...
Marc Posted December 24, 2009 Report Share Posted December 24, 2009 PVC conduit, from the looks of it. Probably 1/2". Marc Quote Link to comment Share on other sites More sharing options...
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