Last month, we reviewed the basic requirements for grounding separately derived systems in accordance with Article 250 of the National Electrical Code (NEC). This month, we will explore a proposed 2002 Code change and how it might impact safety.
2002 NEC proposal
The most important thing to understand about ground fault protection devices is that one type is to protect personnel and the other is to protect electrical equipment, the latter having different trip levels for different types of protection.
My business is to conduct seminars on the National Electrical Code (NEC), grounding and bonding, and electrical safety. Even before it went into effect, questions arose in the seminars about coverage of Design E motors in the 1996 NEC.
In the 1999 National Electrical Code (NEC), Section 110-26, Spaces About Electrical Equipment, consists of 1996 Section 110-16 plus Subsection (f), Dedicated Equipment Space, relocated from 1996 Section 384-4.
This month’s column addresses controversial issues that have come up in NECA’s online “Code Question of the Day.” The author gives his opinion in his answers and invites your comments on the material discussed. Please e-mail your comments to firstname.lastname@example.org.
Article 310—Conductors for General Wiring;
Article 410—Lighting Fixtures, Lampholders, Lamps, and Receptacles;
Article 501—Class I Locations; and
Article 680—Swimming Pools, Fountains, and Similar Installations
Grounding electrode connections
The National Electrical Code (NEC) enjoys the reputation of being the most widely accepted standard in the world. The document is intended to provide for the practical safeguarding of persons and property from hazards associated with electrical installations.
This month’s column addresses two rather different, recurring subjects on Electrical Contractor magazine’s “Online Code Question of the Day.” QUESTION: When building a barn for horses, I was required to establish an equipotential ground plane at the entrance, from the concrete floor of the barn to t
An enclosure that contains a device(s), or supports a fixture(s) or other equipment can be supported by the entering raceways when all of the following conditions are met: 1) the enclosure does not exceed 100 cubic inches in size; 2) the enclosure has threaded entries or hubs identified for the purp
In the 1996 National Electrical Code (NEC), Section 225-8, the requirements for installing a separate disconnecting means for a branch circuit or feeder to a separate building or structure on the same property were fairly simple.
In keeping with the stated purpose of the National Electrical Code (NEC), the “practical safeguarding of persons and property…” protecting workers from electrical shock while using temporary power is of great concern for all electrical contractors.