Can someone point me to the specific section of the NFPA 70 that requires 120V outlets in commercial applications to be upside down (with the ground mounted upward)? The usual answer I get from electricians is s... Is 210.52(B)(1) saying the two or more 20 ampere small appliance branch circuits required by 210.11(C)(1) will supply all outlets covered in 210.52(A)? Or does shall serve all wall and floor receptacle outlets covered... In NFPA 70, Article 501.5(E), 1 For a Class I Division 2, Terminations - it says cables entering an enclosure required to be explosion proof shall be sealed at the point of entry. A squirrel cage induction mot... 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... I just recently installed an UG meter socket and came into a home laterally to (2) 200 amp main breaker panels. My permit was pulled after 1/1/2020 so I totally understand the new code enforcement of having an ... Hello all! I have designed and built an automated battery transfer switch that currently fits into a 70 AMP breaker box. The current setup is home breaker box -> Romex -> device -> Romex -> breaker... I need assistance with interpretation of the following article. My contractor is using the following Code exception to omit labeling on PV string wires. Their logic is that each string wire is is pre-fabri... I have a mobile Radar system, with internal generator, mounted on a truck that was designed and built with a floating ground. When the system is removed from the truck and is sitting on the ground, should the system c... Hi All, In what jurisdictions/instances is the International Building Code enforced? It appears the IBC is more stringent than NFPA codes that I have come across, at least for electrical requirements. ... Can a wireway be classified as a "Free Air" environment if there is 125 scfm of airflow through it? I just moved into an older home where many of the outlets are 2-prong only. My brother in law says that replacing the outlet with a 2-wire GFI outlet would meet electrical code and does not require the ground wire. An... With regards to GFCI requirements NEC 210.8. Requirements for water closets are not addressed specifically. (definition: a water closet is a small enclosed area with a door that contains only a toilet. No sinks, tubs,... I am an electrical novice. In and industrial setting, is it required by NFPA 70/70E to lockout a 120v standard breaker (like a household breaker), where the breaker has not been designed to take a lock? Is a ... in our project, increased Safety (exe) enclosure are installed in class I, zone 2 . As per NPPA 70, Inarticle 505.16 (C):class II, Zone 2 locations, seals shall be located in accordance with 505.16(C)(1) and (C)... In regard to NFPA 110 paragraph 7.2.2. I have a hospital facility that has an open roof equipment yard that contains the EPS as well as an air cooled chiller and chilled water pumps. The EPS is located in its own encl... According to NFPA 110 2016 edition & NFPA 99 2018 edition. Level 1 building. I have an electrical room, indoor, 2hr FR separation from the rest of building. Normal service entrance more than 1000 amperes an... I am currently supporting development of a contractor electrical safety program w/ implementation of NFPA 70e. My question is regard determination of Fault Current (Available) in order to satisfy the use of... In a Class II, Division II area inside a powder paint spray room( not a booth), will I need to put in dust tight LED lighting. Some of the SDS's on the powder paint mentions combustible dust but we do have a dust coll... Do the requirements of the 2017 NEC article 700.3(F) apply to fire pumps? Fire pumps are mentioned in the code commentary but are not referenced in any other part of article 700. They are often served from... Can't post in electrical or industrial hazards forum.