Code Q&A
Dec 26, 2006, By Mike Holt
Code Quiz
Dec 11, 2006, By Steven Owen
Code Q&A
Dec 11, 2006, By Mike Holt
Code Quiz
Nov 27, 2006, By Steven Owen
In a Class 1 location of a spray application (Art. 516) area, portable equipment such as portable electric lamps or other utilization equipment shall be permitted in which of the following situations?...
Code Q&A
Nov 27, 2006, By Mike Holt
Q. What are the limitations on the use of rigid nonmetallic conduit in an underground application serving a gasoline dispenser?...
Code Quiz
Nov 13, 2006, By Steven Owen
The wiring of the emergency system in hospitals shall be mechanically protected. Where installed as branch circuits in patient care areas, the installation shall comply with the requirements of 517.13(A) and 517.13(B). Which of the following wiring methods is permitted?...
Code Q&A
Nov 13, 2006, By Mike Holt
Q. Can Table 310.15(B)(6) (reduced size wire for dwelling unit service) be used to size the service neutral conductor for a single-family dwelling?...
AFCIs on the Brink of a Home Invasion
Nov 1, 2006, By Beck Ireland, Staff Writer
If proposal #2-142 of the National Electric Code (NEC) passes, it will require combination-type arc-fault circuit interrupter (AFCI) protection for all...
Fire Alarm System Facts
Nov 1, 2006, By Mike Holt, NEC Consultant
Article 760 tells us how to install wiring and equipment for fire alarm systems, including all circuits these devices control and provide power to. What...
Top 50 NEC Rules
Oct 25, 2006, By Mike Holt
Code Quiz
Oct 25, 2006, By Steven Owen
What is the proper size overload, and branch-circuit, short-circuit, ground-fault protective device permitted for a hermetic compressor with a nameplate rated-load of 38A, and a branch-circuit selection current of 40A?...
Code Q&A
Oct 25, 2006, By Mike Holt
Q. Do I have to use bonding jumpers around listed reducing washers?...
Code Quiz
Oct 11, 2006, By Steven Owen
What is the proper size branch-circuit, short-circuit, ground-fault protective device required for a hermetic compressor with a nameplate rated load of 38A?...
Grounding and Bonding of Separately Derived AC Systems
Oct 11, 2006, By Mike Holt
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?...
Article 725: Around the Circuit
Oct 1, 2006, By Mike Holt, NEC Consultant
In last month's Code Basics article, starting on page 56 of the September issue, we spent most of our time discussing Class 1 circuits. Now, it's time...
Illustrated Catastrophes
Oct 1, 2006, By Joe Tedesco, NEC Columnist
As usual, never consider the following commentary associated with these photos as a formal interpretation of the National Electrical Code (NEC). Without...
Code Quiz
Sep 25, 2006, By Steven Owen
What is the minimum size XHHW insulated feeder conductor permitted for an industrial machine, which consists of the following loads? All terminals are rated at 75°C....
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?...
Top 50 NEC Rules
Sep 25, 2006, By Mike Holt
