Frederic P. Hartwell

Frederic P.
Don't Be Neutral About Grounding 1
None of us are indifferent about grounding, but we often fail to communicate well.
Code Forum
Portable Standby Systems
Code Quandaries
NEC questions from our Web site
Code Forum
Code Basics: Range Loads On 3-Phase Systems
Quizzes on the Code
Outside branch circuits and feeders—Art. 225
Code Quandaries
NEC questions from our website
Wiring multiple buildings from one transformer.
There are practical industrial applications for wiring several buildings from one transformer, but does it meet Code?A new controversy has come up on
Quizzes on the Code
Load Calculations — Art. 220 (part 2)
Code Forum
Sharing Space Over Panels: OK If Safety Issues Addressed
Manholes: What Does The '99 NEC Have To Say?
What do you need to know about the new Part D of Art. 370, now that the '99 NEC covers manholes for the first time?
Code Quandaries
NEC Questions from Our Website
Quizzes on the Code
Load calculations—Art. 220 (part 1)
Code rules for low-voltage lighting.
A new Code article covering lighting systems operating at 30V or less will modify some and help standardize other low-voltage lighting designs. Additional
Code Quandaries
NEC questions from our website
Should You connect Transformer Ground to Building Ground?
Should You connect Transformer Ground to Building Ground? Q. What are good transformer grounding techniques? I would especially like to know about connecting
Electrical Testing Feed
Join the Discussion on EC&M Talk

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Jul 28, 2016

Next Generation Lighting- The Emergence of POE for Lighting

Historically, lighting controls have always had a singular responsibility: Manage the light. Until now....More
Jul 21, 2015

ON DEMAND: Mitigation Methods for Arc Flash Hazards - Enhancing Personal Safety

The energy released during an arc flash event can result in severe damage to personnel, equipment, and property. While there are solutions which seek to improve the protection for each, this program will focus on personnel....More
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