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

January 2005
Ground-fault circuit interrupter (GFCI) protection for personnel or a similar protection technique has been in the National Electrical Code (NEC) since 1962 with specific reference to GFCI and its definition found in the 1968 NEC. Each subsequent edition of the NEC has seen expansion of the requirements for this very important safety device. READ MORE
December 2004
Grounding electrodes are required to be installed and connected to electrical services and to some feeders or branch circuits in separate buildings remotely located from the service. Is the grounding electrode conductor permitted to be installed inside the building, and if so, what is the permissible length of the grounding electrode when located inside the building? READ MORE
November 2004
Most electricians are very familiar with the spacing requirements for receptacles in dwelling units. In kitchens, family rooms, dining rooms, living rooms, parlors, libraries, dens, sunrooms, bedrooms, recreation rooms or similar rooms, receptacles must be installed so that no point along the floor line is more than six feet measured horizontally from a receptacle outlet in any wall space. READ MORE
October 2004
Dedicated 20-ampere branch circuits are required Most dwelling units are required to have a laundry area within the living area or have a laundry area provided on the premises for a multifamily building. However, some multifamily buildings do not provide laundry areas within the individual apartments and do not have or permit laundry facilities within the complex. READ MORE
September 2004
The basis of grounding and bonding starts at the connection of a bonding jumper or an equipment-grounding conductor to a box, an enclosure or other electrical equipment and ends at the point of connection to the service-grounded conductor in a grounded system or at the service-equipment enclosure for an ungrounded system. READ MORE
August 2004
The five exceptions to providing nonflexible metal raceways Providing alternate power for essential electrical circuits in a hospital is extremely important during loss of normal power. Providing protection from damage will provide additional assurance of the continuity of power to circuits that are vital to the protection of life and safety in a hospital. READ MORE
July 2004
Brush up on what the NEC says about air conditioning During the hottest parts of the summer, most people do not notice the sound of air conditioning units turning on and off, but if a unit fails to start, the effect is noticed immediately. Comfort becomes a premium to be restored at all costs. READ MORE
June 2004
There’s money to be made, but hidden costs as well READ MORE
May 2004
The arc-fault circuit-interrupter (AFCI) has been around for three National Electrical Code (NEC) cycles and, with the advent of the new 2005 NEC, will have been present in three editions, although with various changes within each edition. However, there are still questions concerning how and where to apply these devices in the field. READ MORE

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