Top 50 NEC Rules 

Jan 26, 2007, By Mike Holt

Code Quiz 

Jan 26, 2007, By Steven Owen

Code Q&A 

Jan 26, 2007, By Mike Holt

Code Quiz 

Jan 12, 2007, By Steven Owen

Code Q&A 

Jan 12, 2007, By Mike Holt

What's Wrong Here? 

Jan 12, 2007, By Joe Tedesco

Hint: Bad bend or lack of protection?...

Article 800: Communications Circuits 

Jan 1, 2007, By Mike Holt, NEC Consultant

Because Art. 800 has its roots in telephone technology, it addresses telephone and related systems that use twisted-pair wiring. The telephone utility...

Illustrated Catastrophes 

Jan 1, 2007, 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 

Dec 26, 2006, By Steven Owen

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?...

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