Originally Posted By: Steven Brewster
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I want to be sure that I understand proper wiring techniques for subpanel fed by the main distribution panel. I inspected these today and each is supplied with overcurrent protection at the main distribution panel with the appropriate breaker. My question is bonding & grounds in these subpanels.
As seen in the garage panel, the bare copper serves as the neutral for the panel. All the neutrals and grounds for the branch circuits are connected to the neutral bus and this bus is bonded to the panel. This does not appear to be proper wiring methods since the grounds and neutrals should be isolated with the grounds bonded to the panel. The second pic is similar but serves the HVAC package unit. The breaker only serves as a disconnect at the exterior unit and the panel does not appear to be bonded.
Is this an acceptable wiring method, or should a dedicated ground have been installed. So far, this home has passed local inspections. I would appreciate any feedback.
[ Image: http://www.nachi.org/bbsystem/usrimages/P/P1020289.JPG ]
[ Image: http://www.nachi.org/bbsystem/usrimages/P/P1020298.JPG ]