Sub Panel Grounding and Neutrals - Ask the Electrician The sub panel neutral bar or terminal should not be bonded to the enclosure or the ground of the sub panel. The sub panel ground should not have a ground rod tied to it. The bonding for the main ground sources such as a ground rod is made at the main panel Ground rod required at subpanel? - ECN Electrical Forums Oct 27, 2007200amp meter/main panel located at pump house. Two ground rods and well casing tied to ground bus in this main panel. Passed inspection no problems. 100 amp feeder to subpanel, with ground wire, all THHW/THHN, in PVC conduit to said subpanel in main house. Ground bus and neutral bus isolated at subpanel as per Code. Run of about 110 feet.