Most of us have probably read the standards and should all agree that developing safety policies, programs, and procedures are the responsibility of employers but who is it in your workplace that ultimately develops t... According to the 2018 edition of NFPA 70E®, what is the arc-flash boundary for a 480 volt motor control center that has not had an incident energy analysis performed and is fed by a feeder with 38,000 amps of ava... Most industries don't allow plant operators to perform tasks such as racking breaker, changing fuses and inspections inside electrical cabinets with exposed conductors over 50 volts. For those industries that do... It's the last ERT Code Challenge question of 2017, so get your votes in! I'll be posting the answer next week before NFPA goes on break December 25 - January 1. Happy Holidays! What is the maximum distance a s... The total rating of utilization equipment fastened in place, other than luminaires, shall not exceed what percent of the branch-circuit ampere rating where lighting units, cord-and-plug-connected utilization equipment... For equipment rated 1200A or more and over 6 feet in width containing overcurrent devices, switching devices, or control devices, what is the minimum size of the means of egress required at each end of the working space? What is the required width of the working space required in front of 480V switchgear that measures 84" across by 84" high and has a 480V MCC directly across from it? An 100A feeder supplies a 75kVA, 480V to 208Y/120V, dry-type indoor transformer that feeds a 200A main breaker panel with 4/0 XHHW conductors. Is it permissible to use the feeder EGC as the GEC for the separately deri... What is the maximum standard size, inverse-time circuit breaker that can be used for short-circuit and ground-fault protection for a 480V, 3-phase feeder that supplies a specific fixed motor load with the following ho... An equipment disconnecting means shall simultaneously disconnect all current carrying conductors that are not solidly grounded of the PV circuit to which it is connected. Which of the following best describes a type o... PV system circuits installed on or in buildings shall include a rapid shutdown function to reduce shock hazard for emergency responders. For controlled conductors outside the array boundary, what is the required limit... For a feeder serving a single dwelling unit in a multi-family dwelling unit complex consisting of 2 ungrounded conductors and the neutral conductor from a 208Y/120 volt system, rated 100 amperes, the feeder ... What term is defined in Article 100 as: Capable of being reached quickly for operation, renewal or inspections without requiring those to whom ready access is requisite to actions such as to use tools (other than key... We want to hear from you. Login to place your vote! The owners of an office building have decided to install six, Level 2 fixed electric vehicle charging stations (EVSE) due to an increase in workers that drive electric vehicles. Each station has two charging cords and... Which of the following roles best describes you, and your visit to Xchange today?