Frequently Asked Questions Archives - Rozel | Arc flash studies & electrical safety training

Should you “suit up” to turn a breaker on?

by Jeff Kershner | May 14, 2025 | Frequently Asked Questions, PPE, Safety Tips

You've been interacting with a piece of equipment for years, now you've had an arc flash evaluation and a sticker says "6.1 cal/cm^2". Should you "suit up" to turn this equipment on or off? The answer depends on your risk. Consider NFPA 70E® 2024 - Table 130.5(C)...

What is Exposed?

by Jeff Kershner | Nov 12, 2024 | Frequently Asked Questions, Safety Tips

NFPA 70E® 2024 defines the following: Exposed (as applied to energized electrical conductors or circuit parts). Capable of being inadvertently touched or approached nearer than a safe distance by a person. It is applied to electrical conductors or circuit parts that...

Comprehensive Guide to the “Live Dead Live” Test and Its Importance in Electrical Safety

by Rozel | Aug 22, 2023 | Frequently Asked Questions, Uncategorized

At ROZEL, we prioritize the safety of our clients and their electrical systems. As specialists in Arc Flash Studies, we understand the significance of the "Live Dead Live" test and its...

The 5 Key Ingredients You Need For A Successful Arc Flash Study

by Jeff Kershner | Mar 16, 2023 | Evaluations, Frequently Asked Questions, Safety Tips

Introduction An arc flash study is a crucial part of any electrical safety program. It is required by the National Fire Protection Association (NFPA) 70E standard for assessing the risk of arc flash hazards and determining the appropriate safety measures to protect...

What is Infinite Bus Method (for transformer fault current)?

by Jeff Kershner | Mar 16, 2023 | Evaluations, Frequently Asked Questions

Arc flash calculations have to start at the source of power. If a facility is powered from a generator then generator characteristics are the starting point. If a facility is powered from a utility, then certain characteristics including "fault current", are necessary...

Why Perform an Arc Flash Evaluation?

by Jeff Kershner | Mar 29, 2022 | Evaluations, Frequently Asked Questions, Safety Tips

Consider this comparison: Seatbelts used to be optional but are now enforced and regular practice; calculating arc flash values were once impossible but are now saving lives. Once standardized arc flash calculations were put into place in 2002 (IEEE 1584) the...

« Older Entries

Should you “suit up” to turn a breaker on?

What is Exposed?

Comprehensive Guide to the “Live Dead Live” Test and Its Importance in Electrical Safety

The 5 Key Ingredients You Need For A Successful Arc Flash Study

What is Infinite Bus Method (for transformer fault current)?

Why Perform an Arc Flash Evaluation?

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