Code Q&A

Oct 25, 2006, By Mike Holt

Q. Do I have to use bonding jumpers around listed reducing washers?...

Code Q&A

Oct 11, 2006, By Mike Holt

Q. If an outdoor generator has a disconnect, do I need an additional disconnect where the conductors enter the building?...

Code Q&A

Sep 25, 2006, By Mike Holt

Q. Can I use 12-3 NM cable to wire the bathroom GFCIs and laundry circuit in a dwelling?...

Code Q&A

Sep 8, 2006, By Mike Holt

Q. I recently saw an advertisement for red conduit that is to be used for emergency circuits. Is this a Code requirement?...

Code Quandaries

Sep 1, 2006, By Mike Holt, NEC Consultant

Q. What size conductor is required for a 25-hp, 208V, 3-phase fire pump motor?...

Code Q&A

Aug 28, 2006, By Mike Holt

Q. Can “line” and “load” conductors be installed in the same raceway?...

Code Q&A

Aug 14, 2006, By Mike Holt

Q. What type of fitting can I use to terminate ground wires in a metal box?...

Stumped by the Code?

Aug 1, 2006, By Mike Holt, NEC Consultant

Q. Can 277V circuit conductors be placed within the same raceway with 120V circuit conductors?...

Code Q&A

Jul 25, 2006, By Mike Holt

Q. Is liquidtight flexible metal conduit (LFMC) permitted under the raised floor of a computer room? If yes, must it be secured?...

Code Q&A

Jul 11, 2006, By Mike Holt

Q. Can Table 310.15(B)(6) be used to size service conductors for a duplex?...

Stumped by the Code?

Jul 1, 2006, By Mike Holt, NEC Consultant

Q. Is GFCI protection required for a single-phase, 208V, 30A coffee maker receptacle in a commercial kitchen?...

Code Q&A

Jun 20, 2006, By Mike Holt

Q. When determining the placement for receptacles in a dwelling, is the wall space behind a door required to be considered?...

Code Q&A

Jun 12, 2006, By Mike Holt

Q. Am I required to install the secondary circuit conductors of a low-voltage lighting system (less than 30V) in a raceway or cable like power conductors?...

Code Q&A

May 24, 2006, By Mike Holt

Q. Does the NEC specifically state that a generator must be grounded to the earth if its wiring is connected to the premises via a transfer switch that does not open the neutral?...

Code Q&A

May 11, 2006, By Mike Holt

Q. Can the service disconnect be located within 5 feet of a pool or hot tub?...

Stumped by the Code?

May 1, 2006, By Mike Holt, NEC Consultant

Q. I have six 18-foot metal poles to install in a parking area. Is a ground rod required at each pole? If not, then why do some people insist that they are required?...

Code Q&A

Apr 24, 2006, By Mike Holt

Q. Can an air duct be installed directly above an electrical panel?...

Code Q&A

Apr 11, 2006, By Mike Holt

Q. Can recessed or surface-mounted lighting fixtures be supported by securing them to the suspended ceiling grid, or must they be independently supported from the building structure?...

Code Q&A

Mar 26, 2006, By Mike Holt

Q. What is the minimum burial depth requirement for residential service lateral conductors installed in rigid nonmetallic conduit?...

Code Q&A

Mar 12, 2006, By Mike Holt

Q. Can we install coaxial cables inside the duct work of an existing building?...

Stumped by the Code?

Mar 1, 2006, By Mike Holt, NEC Consultant

Q. When wiring a circuit breaker, does the Code require supply conductors to terminate to the top (line side) of the breaker?...

Code Q&A

Feb 26, 2006, By Mike Holt

Q. Is it good practice to bond the lightning protection system to the building grounding electrode system?...

Q. What size wire and breaker is required for an air-conditioner whose nameplate specifies the circuit conductor must have a minimum rating of 44A, with overcurrent protection not to exceed 60A? The terminals on the equipment are rated 75°C....

Code Quandaries

Feb 1, 2006, By Mike Holt, NEC Consultant

Q. Is GFCI protection required for a 15A or 20A, 125V receptacle that is located within 6 feet of a janitorial closet sink in a commercial building?...