Mark C. Ode

Fire/Life Safety Columnist and Code Contributor

Mark C. Ode is a staff engineering associate at Underwriters Laboratories Inc., based in Peoria, Ariz. He can be reached at 919.949.2576 and mark.c.ode@us.ul.com.

Articles by Mark C. Ode

October 2013
A friend of mine recently called with a question about the cover depth requirement for an underground 120-volt (V) lighting circuit installation in rigid polyvinyl chloride (PVC) conduit supplying a wet-niche luminaire in a swimming pool. Initially, the answer seemed relatively straightforward with a quick reference to 680.10 of the 2011 National Electrical Code (NEC). READ MORE
September 2013
“Motor contribution” is only used in 240.86(C) in the National Electrical Code (NEC), but the NEC does not define it anywhere. A full explanation of this important electrical application is located in other publications, such as fuse and circuit-breaker protection books and articles. READ MORE
August 2013
As we enter the fall, crops are ready for harvest, the leaves on trees are turning color, the evenings have a slight chill, baseball season is nearing an end, football season is just getting started, and we have a new 2014 National Electrical Code (NEC). While summer ends every year, the NEC is issued only every third year, always in August. READ MORE
July 2013
I was involved recently in a discussion on lightning protection for various types of buildings and what standards applied to those installations or if the installations required compliance with NFPA 780, Standard for the Installation of Lightning Protection Systems; UL 96A, Standard for Installation Requirements for Lightning Protection Systems; or IEEE-142, Standard for Static and Lightning Prote READ MORE
June 2013
Many of the articles that I write for this magazine originate as questions that I receive as I travel, by phone, or come to me as emails. I can answer some of these questions very easily without much controversy by a simple reference to the National Electrical Code (NEC). READ MORE
May 2013
In the 2011 and previous editions of the National Electrical Code (NEC), installing low-voltage lighting in close proximity to the edge of a swimming pool was a Code violation, yet almost every backyard swimming pool with a landscaped yard has low-voltage lighting too close to the pool’s edge. READ MORE
April 2013
Article 424 in the National Electrical Code (NEC) addresses fixed electric space heating equipment, stating, “for the purpose of the article, heating equipment shall include heating cable, unit heaters, boilers, central systems, or other approved fixed electric space-heating equipment.” Since the scope clearly covers boilers, further investigation into Article 424 will determine if the NEC covers READ MORE
March 2013
Over the years, there always seemed to be a lack of understanding of the requirements for feeder taps as well as transformer primary and secondary overcurrent protection. READ MORE
February 2013
In the 2005 National Electrical Code (NEC) process, proposals were submitted to change the phrase “equipment grounding conductor” to “equipment bonding conductor” wherever the phrase existed throughout the NEC. READ MORE

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