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 2005
Providing mechanical protection for branch circuits supplying critical loads in a hospital is extremely important. Any potential damage to these circuits could cost lives. Patients rely on life support equipment and other electro-medical devices as part of their treatment, and any interruption of power could have dire results. READ MORE
September 2005
Many electrical contractors, electricians and electrical inspectors have struggled with the requirements in the National Electrical Code (NEC) for placement of lights, receptacles and switches in bathtub and shower areas. Can receptacles be installed within proximity of the bathtub or shower edge? READ MORE
August 2005
A new definition covering supplementary overcurrent-protective devices has been added to Article 100 in the 2005 National Electrical Code (NEC) to indicate that limited protection may be provided for specific applications or utilization equipment. READ MORE
July 2005
With the acceptance of the 2005 National Electrical Code (NEC), installing and servicing fluorescent luminaires (fixtures) has become a complex situation. The design and layout of the lighting system is critical in determining certain required added features. Part XIII of Article 410 provides special provisions for the connection of electric-discharge lighting systems of 1,000V or less. READ MORE
June 2005
Selective coordination has been a requirement in the National Electrical Code (NEC) for many years but has been limited to a few required applications. READ MORE
May 2005
A major change has occurred in Article 680 in the 2005 National Electrical Code (NEC) that will affect all swimming pools not constructed using conventional steel rebar and concrete (gunite). This change will dramatically affect the construction of fiberglass pools, pools using plastic liners and those using epoxy-coated steel rebar. READ MORE
April 2005
The text in Section 230.40 covering the number of sets of service-entrance conductors for each service drop or lateral has not changed since it was accepted into the 1984 National Electrical Code (NEC). READ MORE
March 2005
Arc-fault circuit-interrupter(AFCI) protection requirements were first submitted to the National Electrical Code (NEC) process for the 1996 NEC but were not accepted until the 1999 NEC. These requirements as detailed in Section 210.12 were expanded for the 2002 NEC and have been changed again for the 2005 NEC. READ MORE
February 2005
In the 2002 and previous editions of the National Electrical Code, the metal frame of a building or structure was required to be used as a grounding electrode when the metal of the building or structure was effectively grounded. Whether the metal frame of the building or structure was considered effectively grounded became a judgment call of the installer, the inspector or both. READ MORE

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