Submeter bonding

[rojay]

I wanted to confirm that the grounded conductor/neutral lug of a submeter that we installed for a customer would need to be isolated from the case of the meter. The submeter requested was just a standard Milbank overhead style meter fed from basement switchgear. Since the main bonding jumper is installed in the service equipment, I am of the understanding that the neutral in the meter needs to be isolated. The panel that our submeter feeds would be minus the bonding screw also- correct?

 

[texie]

I wanted to confirm that the grounded conductor/neutral lug of a submeter that we installed for a customer would need to be isolated from the case of the meter. The submeter requested was just a standard Milbank overhead style meter fed from basement switchgear. Since the main bonding jumper is installed in the service equipment, I am of the understanding that the neutral in the meter needs to be isolated. The panel that our submeter feeds would be minus the bonding screw also- correct?

I would say yes. There is an exception for this, but I don't think it applies here. Until fairly recently, it was hard to get a standard meter can that you could unbond the neutral. Now they all pretty much use the same concept as a panelboard where it is the installers choice. It seems to me that this is the very reason the manufacturers are doing it this to accommodate situations like yours.

 

[meternerd]

A lot of manufacturers are building meter panels with "insulated standoff" neutral mounts to provide for solar production meters. By the way...240 volt 3 wire meters don't use the neutral.