As noted in NFPA 70B, insulated-case and molded-case circuit breakers should be kept clean of external contamination (Comstock/Stockbyte/Thinkstock). Low-voltage ...

ONJune 11, 1999, an electrician was troubleshooting the emergency power system. After testing the transfer panel, he moved to the emergency breaker compartment (480 volts, 200 amps), removed the cover ...

To encourage safer electrical systems, the 2023 update to National Fire Protection Association (NFPA) 70B shifted from a“Recommended Practice” to a“Standard” that contains mandatory requirements for ...

Jerry, plant safety manager at the Cornerstone auto plant, smiled as he hung the latest safety commendation plaque on the wall, which he’d just received for another accident-free month. As he stood ...