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Arc Flash Forum Update

Regenerative Drive Contributions to Upstream Fault

Is there any information on what a regenerative drive will allow a motor to contribute to an upstream fault? I know ANSI has some standards for motor contributions based on

Arc Flash Labels-PPE Category

In the NFPA 70E-2015 Handbook, page 122, 130.5(D) states incident energy or PPE category shall be on the equipment arc flash label, but not both. Yet when reviewing Annex H

Reducing Arc Flash I/E At Fire Pump Controllers

Question: What are you guys recommending to reduce incident energy levels on fire pump controllers fed directly from the secondary side of utility transformers? Answer: Can’t be done. This is

Work on an energized disconnect

Recently, a client asked if there was something I could point to in the NFPA 70E Standard that specifically prevented a qualified electrician from working on a disconnect after it

120 Volt Arc Flash

I believe it to physically impossible to sustain an arc flash at 120 V but can someone point me to the proof? Can someone indicate where a code specifically states

Arc Flash Label Updating – How Many Times?

NFPA 70E requires that an Arc Flash Risk Assessment be updated when a major modification or renovation takes place. It shall be reviewed periodically, at intervals not to exceed 5

Maximum Short Circuit Current

The intensity of an arc flash is dependent on the magnitude of short circuit current. Lower voltage systems (less than 600 volts) tend to have the highest short circuit currents.

Using gloves with a stick

1910.269 requires arc flash protection for hands with exceptions when wearing leather protectors over rubber gloves, and when wearing heavy duty work gloves. The workers state that sticks should be

DC Arc Flash Boundary

Could i use the (DB) empirically derived model equation of IEEE Std 1584-2002 to calculate the Flash-protection boundary (for box configurations) and the Lee (DB) equation (for open air configurations)?

100A panel with 200A “gutter mounted” main. WTF??

Came across this today while surveying. The original drawing shows this panel with a 100A branch mounted main. Well, someone needed that breaker for another panel and removed it and

ANSI Z535 – Series of Standards for Safety Signs and Tags

Many safety labels use either Caution, Warning or Danger with a specific color associated with it. The U.S. National Electrical Code and NFPA 70E both reference ANSI Z535 to provide

Maintenance of LV components inside HV cabinet

Good Morning All, I am from the Safety Office and our organization prohibits working on electrical components/systems above 600V. I have a situation that I need advice on. Here is

International Expert​

Jim is the International Chair of Geneva, Switzerland based International Electro-Technical Commission’s TC 78 for Live Working. He is also Vice-Chair of IEEE 1584, Technical Committee Member of NFPA 70E and active with many other standards organizations. 

He continues to travel the globe typically flying over 150,000 miles a year to work with various U.S. and international standards organizations and speak at many conferences and training events.

Jim and his wife of over four decades live in Scottsdale, Arizona. 

Multi-Award Winning: Best Paper at PCIC Conference and Electrical Safety Excellence recipient - to name a few.