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, ...

As noted in Sec. 406.3(D)(2), isolated ground receptacles installed in nonmetallic boxes shall be covered with a nonmetallic faceplate or (by Exception) a metal faceplate if the box contains a feature ...

Few topics in the industry elicit as much controversy as grounding. Poor grounding practices cause ongoing equipment problems in a facility, whereas proper deployment ensures reliable and productive ...