Frederic P. Hartwell

Frederic P.
Hartwell
Articles
Kitchen receptacles below countertops. 1
The ability to allow kitchen countertop receptacles located below the countertop is more limited than some have interpreted.Important changes have been
Unusual code issues involved in service change, part 1.
A small multifamily dwelling service change reveals interesting Code applications.One of the best features of the electrical trade is that every day,
Serving electric fire pumps.
The new Art. 695 makes it effectively impossible to install electric fire pumps in the majority of large-sized campus and industrial occupancies.One of
Panel to vote on fan box TIA
Code Making Panel (CMP) 9 is being forced to revisit the question of whether most residential ceiling boxes should be required to be listed as suitable
Wiring fluorescent ballasts with Class 2 controls.
The ballast compartment of a fluorescent fixture must meet the same rules as any other field-wired enclosure with respect to system separation.We have
Applying the new 1996 NEC rules for motor circuits
Fundamental changes are on tap for motor circuits as provisions, largely unaltered since the 1940 NEC, are drastically modified or deleted entirely.Motor
Lights at hatchway doors.
Hatchway or bulkhead doors must be lit even where the local building code doesn't consider them to be an official entrance or path of egress.The drawing
Illustrated changes in the 1996 NECode, part 4
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
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
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
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
Grounding remote pump stations.
Efforts to ensure continuity of power must not create potential hazards through improper grounding techniques.Remote pumping stations, each with their
Horsepower designations on appliances.
Improperly substantiated horsepower designations on pool motors and other appliances may resize many circuit elements without increasing safety.We received
Protecting high-efficiency motor circuits.
Some types of overcurrent protective devices may not prove suitable for all high-efficiency motor applications.We received a series of questions related
Grounding non-separately derived generator systems.
These answers are given by our panel of experts. I am chairing this panel, and the other panel members include Bill Summers, James Stallcup, and Dan Leaf.
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