Mark C. Ode

Fire/Life Safety Columnist and Code Contributor

Mark C. Ode is a lead engineering associate for Energy & Power Technologies at Underwriters Laboratories Inc. and can be reached at 919.949.2576 and

Articles by Mark C. Ode

May 2011
For the 2011 National Electrical Code (NEC) process, Code-Making Panel 15 received many proposals recommending changes to Article 517. These proposals were intended to coordinate and correlate with changes to the 2010 NFPA 99 document. READ MORE
March 2011
NFPA 101, the Life Safety Code, and the International Building Code (IBC) require emergency lighting in all commercial and industrial buildings to facilitate emergency egress of people from the building and to reduce the possibility of panic in buildings during the exiting of large numbers of people during an emergency. READ MORE
February 2011
As I discussed in last month’s column, Article 310, covering conductors for general wiring, has been totally rewritten for the 2011 National Electrical Code (NEC). This article is now divided into three parts: Part I covers general requirements, Part II covers installations of conductors, and Part III covers construction specifications for conductors. READ MORE
November 2010
The 2011 National Electrical Code (NEC) provides a controversial and much-discussed new 110.24 involving field-marking of available fault current on service equipment. The new requirement will not be required for dwelling units, and an exception has been added to the new text that permits a major portion of the electrical industry to bypass it. READ MORE
October 2010
Periodically, I receive requests to address issues about installations of low-voltage lighting systems and regular lighting around swimming pools. I decided this issue would be best addressed as an article in this magazine. READ MORE
September 2010
Where raceways and cables contain No. 4 AWG or larger conductors and connect to conduit bodies, do these conduit bodies have to meet the same dimension requirements as pull and junction boxes? Does the 2008 National Electrical Code (NEC) provide clear and concise text covering this situation, or is an interpretation of the text necessary? READ MORE
August 2010
My August 2007 article, “Isolated Ground Receptacles,” questions whether isolated ground (IG) receptacles should be permitted in a patient care area. I wrote that Article 517 of the National Electrical Code (NEC) applies to electrical construction and installation criteria in healthcare facilities, providing healthcare services to human beings. READ MORE
July 2010
Electrical construction has always been a dangerous profession, so finding ways to make the work less hazardous is certainly the goal of the National Electrical Code (NEC); Underwriters Laboratories; the Occupational Safety and Health Administration; NFPA 70E, the Standard for Electrical Safety in the Workplace; the National Electrical Manufacturers Association; the National Electrical Contractors READ MORE
June 2010
Recently, i witnessed an electrical inspector and a group of electricians discussing the effectiveness of the bonding and grounding path where raceway fittings are used to connect raceways to threaded hubs, threaded bosses or conduit bodies. Although this is a fairly common practice in the field, the discussion revealed varied opinions on the acceptability of these installations. READ MORE