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- Electrical Basics

The Key to Making Proper Neutral-to-Case Connections

Published Friday, November 15, 2002

With the problems an improper neutral-to-case connection can create, it's important to closely follow the grounding requirements of Art. 250 in the 2002 NEC. How do you prevent fire, electric shock, or improper operation of circuit protection devices and other equipment? By stopping objectionable current (neutral return current) from flowing on electrical equipment, grounding paths, and bonding paths as required by the NEC in 250.6. To do this, you must keep the grounded (neutral) conductor separated from the metal parts of equipment, except as required for service equipment in 250.24(B) and on separately derived systems in ...

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