Mar 08, 2013
A common application of multiwire branch circuits as described in section 210.4 is for a 120/240-volt, single-phase system where three wires do the work of four, the two ungrounded conductors sharing a single neutral. In a 20 amp multiwire branch circuit if the two ungrounded conductors each carry 15 amps, some people think the neutral carries 30 amps, or the combined total of the current on each ungrounded conductor.
Feb 06, 2013
As of January 1, 2013, the Alabama Board of Electrical Contractors has adopted Rule 303-X-5 that requires continuing education for all licensed electrical contractors and provisional electrical contractors.
Jan 04, 2013
Here is a brief look at ten important changes in the 2012 Edition of NFPA 70E.
Jan 03, 2013
Marking the maximum available current and the calculation date on the service equipment makes it much easier to confirm the interrupting rating of the equipment.
