Code Quandaries is back, and Mike Holt, EC&M's NEC Consultant, is here to answer your most difficult questions. Need some help with an installation? Clashing with your local inspector? E-mail Mike at ...

All Code references are based on the 2005 NEC. The grounding and bonding requirements in this column apply to solidly grounded systems that operate at not more than 600V, such as 120/240V, 120/208V, ...