GFCI basics. Before we get into GFCI requirements, let's address two basic points. First, GFCIs do work on 2-wire circuits. A GFCI works by measuring the current on the ungrounded conductor and ...

Q. What are the NEC requirements for GFCI protection for branch-circuit receptacles in locations other than dwelling units? A. GFCI protection is required for all 125V through 250V receptacles ...

Said to be ideal for applications requiring branch circuit protection that comply with UL and CSA standards, the Bulletin 1492-MC circuit breakers may be used to protect wiring and associated ...