Standards changes, exam-relevant deep dives, and practical field guidance — grounded in the same NFPA 70E citations used throughout ArcReady's study guide and question bank.
Establishing an Electrically Safe Work Area: The Steps People Skip
Lockout/tagout isolates the power. It doesn't prove the equipment is actually dead. Here are the verification steps that trip people up most on the exam - and on the job.
Read more →ELI the ICE Man: Making Sense of Phase Shift in AC Circuits
Inductors and capacitors don't just resist current like a resistor does - they shift voltage and current out of sync with each other, in opposite directions. One old mnemonic keeps the two straight for good.
Read more →PPE Is Your Last Resort, Not Your First
A Job Hazard Analysis isn't a form you fill out after deciding what PPE to wear. It's supposed to work through five other options before PPE even enters the conversation.
Read more →NFPA 70E PPE Categories 0-4, Decoded
Five categories, one incident-energy number deciding which one applies, and a hard ceiling above 40 cal/cm² where the tables simply stop answering the question.
Read more →Reading a Multimeter Like a Detective: Open vs. Short Circuit Signatures
An open and a short leave opposite fingerprints in voltage and resistance. Once you know what each one looks like, tracing a fault stops being guesswork.
Read more →The Eight Steps of LOTOTO (It's Not Just Lock and Tag)
Lockout/Tagout/Tryout is eight ordered steps, not two. Most of the ways it goes wrong happen well before anyone touches a padlock.
Read more →Why 120 Volts Kills: The Physiology of Electrical Shock
120V sounds mild next to a 480V panel. It isn't. A little Ohm's Law and a look at how current - not voltage - affects the human body explains why the "low voltage" outlet in your wall can be just as lethal as the big equipment.
Read more →Four Boundaries, One Panel: Making Sense of NFPA 70E's Approach Distances
Limited, Restricted, Arc Flash Protection, and the equipment itself - four zones around every energized panel, each with a different rule for who can be there and what they need to be wearing.
Read more →Wye vs. Delta: The Three-Phase Question That Trips Up the Exam
Two ways to wire three-phase power, two different relationships between line and phase voltage, and one formula - √3 - that shows up so often it's worth memorizing on its own.
Read more →The 15-Second Glove Check That Prevents Fatalities
Rubber insulating gloves are the main thing standing between a qualified worker's hands and a lethal shock. The air inflation test that verifies they're intact takes about 15 seconds - and skipping it is more common than it should be.
Read more →What Actually Happens Inside an Arc Flash
An arc flash isn't a fire and it isn't a shock. It's a plasma explosion that can hit four times the surface temperature of the sun in microseconds - and the number that decides how bad it is has nothing to do with voltage alone.
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