Mike Holt

Articles by Mike Holt
Code Quandaries
Q. Can I pass conductors from one panel through another panel? If so, what are the restrictions?
Code Q&A
Q. What are the requirements for supporting outlet boxes above/to suspended ceilings?
Code Q&A
Q. When a lighting and appliance panelboard is fed from the secondary of a 3-phase transformer, is the panelboard required to have a main breaker installed in it?
Article 215: Feeders
Last month, we looked at branch-circuit requirements in Art. 210. The next logical step up from the branch circuit is the feeder circuit. Thus, Art. 215,
Code Quandaries
All questions and answers are based on the 2005 NEC. Q. Since the neutral is bonded to the case at the meter enclosure, do I still need to bond the neutral
Code Q&A
Q. Can I install conductors from different panels in the same raceway?
Code Q&A 1
Q. Can I connect a range hood in a dwelling unit kitchen to the small appliance circuit? A. No. The 20A, 120V small-appliance circuit is only permitted to supply the receptacle outlets as per 210.52(B) . However, range hoods can be hardwired to a 15A or ...
Branch Circuits - Part Two
Article 210 provides GFCI requirements in 210.8 and AFCI requirements in 210.12. These requirements apply to 125V receptacles rated at 15A or 20A (circuits
Code Q&A
Q. I was told that I’m not allowed to install bedroom lights on an AFCI circuit. Is this true? A. No. All 15A or 20A, 120V branch circuits that supply outlets (including lighting and smoke alarm) in dwelling unit bedrooms must be protected by a listed ...
Code Q&A
Q. Can I secure signal or communications cables to ceiling-support wires or ceiling grid? A. No. Ceiling-support wires and ceiling grids are not permitted to support raceways and cables. In this situation, you must provide independent support wires ...
Top 50 NEC Rules
To remove dangerous voltage on metal parts from a ground fault, electrically conductive metal water piping systems, metal sprinkler piping, metal gas piping, and other metal piping systems, as well as exposed structural steel members that are likely to ...
Stumped by the Code?
Q. Is it legal to make a mechanical transition from electrical metallic tubing (EMT) to flexible metal conduit with a fitting that joins these two raceways instead of installing a box?
Branch Circuits - Part One 1
Article 210 contains the requirements for conductor sizing, conductor identification, overcurrent protection, and GFCI and AFCI protection of branch circuits.
Code Q&A
Q. Can a circuit breaker be used to switch fluorescent lighting? A. Yes, but the circuit breakers must be listed and marked SWD or HID. High-intensity discharge (HID) lighting can be switched only by circuit breakers marked HID . ...
Code Q&A
Q. I’m running a 4-wire lighting circuit with a shared neutral. Can I use three single-pole breakers without handle ties? A. Yes. Individual single-pole breakers can be installed on each ungrounded conductor of a multiwire branch circuit that supplies ...
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