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Vídeos para llenar el cerebro

2027 NFPA 70E – Additional Person Requirement

A conversation that you do not want to have. John: Have you seen Bill? Sue: I saw him this morning as he was headed to the work location. John: It’s

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2027 NFPA 70E – Absence of CURRENT

NFPA 70E Hazard Elimination – Absence of Current NFPA 70E emphasizes hazard elimination as the first priority in the implementation of safety-related work practices. This requirement is normally met by

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9.0 Earthquake | Fukushima | Arc Flash | and Me

Fifteen years ago on March 11, 2011, a devastating earthquake struck Japan with a magnitude of 9.0. Little did I know at the time that I would become part of

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Impedance Grounding and Arc Flash

A short circuit happens when energized conductors accidentally make contact with each other and/or to ground. When that connection forms, the load and its impedance is bypassed resulting usually resulting

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When Horizontal Bus is NOT HCB

Question:I have a switchboard with horizontal bus. Should I use the HCB model? Short answer:Not necessarily. Wait! What? Horizontal might not be horizontal? NFPA 70E requires performing an arc flash

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Arcing Fault Current, NFPA 70E and IEEE 1584

IEEE 1584 defines arcing fault current as the reduced current that flows during an arc flash event, differing significantly from bolted fault current. Understanding this distinction is critical for accurate

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NFPA 70E and Arc-Flash Calculations Above 15 kV

IEEE 1584 is validated only up to 15 kV, leaving higher-voltage systems outside its empirical model. This article explains what NFPA 70E requires above 15 kV and outlines defensible approaches

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Why NFPA 70E Labels Aren’t Always Consistent

NFPA 70E arc-flash labels often display distances and incident energy in different units, leading to confusion. This article explains why IEEE 1584 requires metric calculations and how labeling conversions still

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Proud Partner of Electrical Safety UK, Ltd. Rotherham (Sheffield), England

Brainfiller and Jim Phillips are proud to partner with Electrical Safety UK (ESUK), a leading authority in arc flash and electrical safety across the UK and Europe.

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NFPA 70E Arc-Flash Label Colors and Words — What’s Correct?

NFPA 70E requires arc-flash labels, but it does not mandate specific colors. This article explains how ANSI Z535 signal words influence label colors and what is considered best practice for

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IEEE 1584, NFPA 70E and the “2-Second Arc Duration” Myth

The 2-second arc duration is often misunderstood in IEEE 1584 and NFPA 70E applications. This article explains what the assumption really means and when engineering judgment must be applied.

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Arc-Flash Boundary and NFPA 70E — Is It a “Safe” Place to Stand?

The arc-flash boundary in NFPA 70E is often misunderstood as a “safe” distance. This article explains what the boundary actually represents and why below 1.2 cal/cm² does not mean risk-free.

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NEW! IEEE 1584.2 was Recently Published

IEEE 1584.2 was recently published! The full title is: IEEE Guide and Checklists for Data Collection for Performing an Arc-Flash Hazard Calculation Study in Accordance with IEEE Std 1584™ and

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Why Jim Phillips Is a Trusted NFPA 70E Expert

Electrical safety isn’t theory—it’s protection for people, equipment, and uptime. For more than 40 years, Jim Phillips has helped engineers, electricians, and safety professionals turn the NFPA 70E Standard for

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Over Two Decades of IEEE 1584 Standards

No, the title doesn’t have a typo — “Standards” is plural for a reason. Over 20 years ago, in 2002, the original IEEE 1584 standard was released and changed the

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NFPA 70E 205.4: The Power of Noncontact Diagnostics

NFPA 70E 205.4 and Noncontact Diagnostics If you're in the electrical world, you’ve probably seen how fast technology is changing the way we maintain equipment. The 2024 edition of NFPA

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