Hazardous Locations-Articles 500-505 (Part 2)
Feb 1, 1998, Frederic P. Hartwell
Choose the best answer:1. Assume qualified engineering staff and well-trained electrical maintenance personnel. How could they, as a practical matter,...
Transfer switches and the '96 NEC: what you need to know
Nov 1, 1996, Hartwell, Frederic P.
New NEC changes allow for increased design flexibility in hospital essential electrical systems through the use of more transfer switches.Not all Code...
Be aware of zone system equipment markings.
Aug 1, 1996, Hartwell, Frederic P.
What do the new zone classification system markings mean, and how do they apply to specific equipment applications?Art.505 of the 1996 NEC introduces...
Code applies to some internal wiring.
Aug 1, 1996, Hartwell, Frederic P.
A control circuit that is part of industrial machinery, even machinery listed as a whole, must meet any applicable grounding requirements.We have received...
NEC survives ANSI appeal
Aug 1, 1996,
He said that, under the rules, a panel statement need not be either technical or comprehensive. He also noted that the council decision pointing to panel...
NEC TIAs under discussion. The first TIA (from William V. Scerbo, Remington Products) suggests a new section be added to Art. 422 that would limit handheld hair dryers to 12A if using a 15A cord cap, and to 16A if using a 20A cord cap. Scerbo notes that
Jun 1, 1996,
Code rules for low-voltage lighting.
Apr 1, 1996, Hartwell, Frederic P.
A new Code article covering lighting systems operating at 30V or less will modify some and help standardize other low-voltage lighting designs. Additional...
Applying the new 1996 NEC rules for motor circuits
Mar 1, 1996, Hartwell, Frederic P.
Fundamental changes are on tap for motor circuits as provisions, largely unaltered since the 1940 NEC, are drastically modified or deleted entirely.Motor...
Non-linear loads and the 1996 NEC
Feb 1, 1996, Andersen, William O., Jr.
How has the 1996 NEC addressed the problems created by non-linear loads and harmonics?Non-linear loads are not new; forms of such loads have been present...
Illustrated changes in the 1996 NECode, part 4
Dec 1, 1995, Hartwell, Frederic P.
A new NEC is on tap, with some of the most far-reaching changes ever made as we begin the next 100 years of the Code. Part 4 of a 4-part series.This analysis...
Tables, examples, and appendices - chapter 9 and appendix B
Dec 1, 1995, Hartwell, Frederic P.
Select the best answer:1. If four 12-2 Type NM cables measuring 0.48 in. by 0.20 in. in cross section are run in a raceway along a wall 70 ft between....
Illustrated changes in the 1996 NECode
Nov 1, 1995, Hartwell, Frederic P.
A new NEC is on top, with some of the most far-reaching changes ever made as we begin the next 100 years of the Code. Part 3 of a 4-part series.This analysis...
Illustrated changes in the 1996 NECode
Oct 1, 1995, Hartwell, Frederic P.
A new NEC is on tap, with some of the most far-reaching changes ever made as we begin the next 100 years Code. Part 2 of a 4-part series.This analysis...
1996 NEC issued with zone concept.
Aug 1, 1995,
The hearingThe Council held a hearing on the question on July 19, 1995. Speaking in favor of sustaining the floor action and including the zone concept...
