Log in to follow, share, and participate in this community. Greetings, Are there any NFPA mandated requirements that require HWH for emergency eyewash to be powered from stand-by system bus as opposed to "normal" system bus? I have a system that has a normal bus supplie... Good Day, In the process of setting appropriate safe work conditions for use on various pieces of electrical equipment, the team at my organization has uncovered some questions on appropriately applying the 50... Conductors in a cable tray are installed per 392.80(A)(2)(d) and both ends of the conductors emerge from the cable tray and terminate in equipment with 75C rating. Since the conductors are installed per 392.80(A)... In the 2017 NEC, MUST this receptacle have GFCI protection? From what I'm reading I cannot determine if they mean ONLY the garage receptacles in "storage areas, work areas, and areas of similar use." I thought that as I close out this work week I would say thank you to all that contribute to making the use of electrical energy safer, more efficient, and easily accessible. Have a blessed holiday ! When did the rule forbidding garage outlets on Small Appliance Branch Circuits begin? I know that it's 210.52(b) in 2014, 220-3(b) in 1974, 1962, and 1959, and 2115-b in 1956. As per NFPA 72, what is the minimum required area of the room or building where fire alarm control system is not required? In regards to NEC 2014 250.122(B). [Conductors are based on THWN-2, 75 degree terminations and 86 degree F ambient temperature]: Question/Condition 1: Engineer selects (1) run of (4) #350 KCMIL copper conducto... I have a touchscreen HMI display that I want to locate in a Class 1 Div 2 area. The display is not rated for the area so I plan to mount it in a purged and pressurized enclosure. The question is, is that good enough? ... Can i use Flame detector for Aerosol plant according to NFPA 30B. i am going to active the deluge system with it and its inside 312.2 says in wet or damp locations to cabinet or cutout boxes shall be mounted so there is at least 1/4 inch airspace between the inclosure and the wall or supporting surface. My question is how to achieve this spaci... With a meter main disconnect combo. Using the main lugs from the disconnect (not one of the additional breakers in the M M combo) to run cable to a interior panel board. Would this designate my Interior panel board as... I have been asked the following question. My answer would be yes, as long as the equipment is maintained and appears to be working properly. What would the correct response be? I have a client that has a room t... NEC 690.15 -2017: Are the inverters required to comply with the requirement of NEC 690.15 -2017, to be located within 10' of the inverter? Can an uninsulated lift be used for electrical tasks such as verifying zero energy, changing light bulbs in up to 480V systems? The 70E states that if ladders are used within the Limited Approach Boundary they shall h... 5 Year Reassessment Due--If there are no changes in the electrical system distribution from Utility provider to end user. No new equipment, single-lines remain the same, available fault current from Utility prov... I'm looking to see if there is a industry standard for a wire tracking tool. Need something for indoor use to find wire through all types of standard wall sheeting materials. Live and dead wire tracking. Does anyone k... I am a apprentice and recently we ran 2-2-2 AL wire from a main panel on a grain bin under ground in schedule 80 PVC to a cow barn but we did not run a ground conducter with the current carrying wire. I asked if this ... Say for example, you have a 120/240 V, 2 pole, 20 A breaker. Does the NEC allow this breaker to serve 2 separate 120 V circuits?