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Arc Flash Forum Update

Series Ratings NEC 240.86

The National Electrical Code article 240.86 addresses series ratings with the following: Where a circuit breaker is used on a circuit having an available fault current higher than the marked

IEEE 1584 – Required Certification for Products/Services?

I have heard a rumour that IEEE1584 are up to their old tricks again. Back in 2012 it was to introduce royalties for use of the equations. This time I

New to Arc Flash, Short Circuit and Coordination studies

Hi. I currently work as an Engineer in the energy management field. I would like to branch off in to doing Arc Flash, Short Circuit and Coordination Studies. How would

ArcPro and Windows 10

Has anyone found a way to run ArcPro on Windows 10? I cannot even install it on Windows 10. Not sure about any 3rd party programs that could emulate a

X factor for Disconnect switches

Hello What is the optimal X factor for disconnect switches. I assumed it is 2 because that’s the default value that ETAP gives you. Am I correct for assuming this?

PE/Certification (moved from IEEE 1584 Certification thread)

There is a long and well documented fight between the NSPE as the “political arm” of professional engineering and various industry groups which have all but made “industrial exemption” here

Arc Flash Shields in disconnect boxes

I repair UL listed appliances that are sometimes directly wired into a fused or unfused disconnect box if they exceed 50A. Sometimes I need to test the voltage on both

Existing Overdutied Equipment

This week’s question is a continuation of last week’s topic regarding overcurrent devices that do not have an adequate interrupting rating. When the calculated short circuit current is greater than

PPE Selection when Interacting with non-labeled Equipment

Hi All, To put my question in context, I train Industrial Maintenance and Construction Electricians at a Community College. Some of the students are new to the field and are

Fiber Optic Arc Flash Detection Modeling

I will start by stating that I am not 100% familiar with these types of systems [Fiber Optic Light Detecting]. In recent MV switchgear submittal the manufacturer [I assume at

Arc Flash Boundary – Calculated, Larger, Something Else?

It has been a while since a question of the week was asked about the Arc Flash Boundary. This is the distance from a prospective arc flash where the incident

Non Specific incident energy

I have started working at a manufacturing plant where the past practice is to put <1.2 cal on their arc flash labels. The thought being that any run less than

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.