Mark P Posted December 18, 2014 Report Share Posted December 18, 2014 The home has a ground source (geothermal) heat pump. The local utility gives a discounted rate for the electricity used by the heat pump so a meter is installed in the basement for just the heatpump. Outside there is another mete for the rest of the house. The power runs from the main panel to the inside meter then to the panel used by the heat pump. My question is "Is the small panel a subpanel and needs to be wired as such, or does the presence of the meter somehow NOT make it a subpanel and it is ok to keep the ground and neutrals on the same bar"? Just an odd thing I dont see often and is making me question myself. Click to Enlarge 89.45 KB Quote Link to comment Share on other sites More sharing options...
Marc Posted December 18, 2014 Report Share Posted December 18, 2014 If there's more than one circuit on that extra panel, it's a sub. If the OC protection for the circuit beginning from that extra panel is provided by a breaker in the main panel then the extra panel is actually just a disconnect. Marc Quote Link to comment Share on other sites More sharing options...
Mark P Posted December 18, 2014 Author Report Share Posted December 18, 2014 I justed noticed it says "sub" right on the face of the meter, funny. Quote Link to comment Share on other sites More sharing options...
Jack Davenport Posted December 20, 2014 Report Share Posted December 20, 2014 What you are seeing is referred to as "sub Metering". The exterior meter is the main meter for ALL electricity used. The submeter records the amount of electricity the geo system uses . This is the credit amount provided to the utilities customer. The presence of a meter does not make it a service.The service stops at the systems main breaker. In this case that is in the larger panel.That small panel is a sub panel and shall be wired as such. Quote Link to comment Share on other sites More sharing options...
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