• Existing Electric Room 110.26

    Would the NEC 2017 110.26 C 3 require 2 doors for an existing electrical room with a 1600 amp service if the only new work is to add a  breaker feeding a new distribution board in a new Electrical room? Currently...
    last modified by inspectorq
  • Underground Conduit Reducer

    Is it permitted by NEC to use a conduit reducer in an underground installation of PVC? We would like to reduce from 2 1/2" to 2" PVC for an underground service conduit system.
    last modified by jamieshea
  • This should never happen.

                                            Thanks to NFPA and its readers they surely understand the true dimension of ...
    created by carretero110
  • Third Party Certification for Pipe of Aspirating Smoke Detectors

    I am using Aspirating Smoke Detectors in a factory. Do we need Third Party Certification for Pipes of Aspirating Smoke Detectors?
    last modified by azad.musfiqul
  • SJ/SO cord conductor color use

    I have a heating unit that is supplied 3 phase (with ground) power via an SJ/SO type of cord (it may be either 230 or 460).  The question is about conductor colors within manufactured cables: do I have to re-iden...
    last modified by kgilpin@adcomfg.com
  • Electrical and Telecommunication Rooms need automatic sprinkler or not.

    Dear NFPA,   My project is 3 story residential building, whole building is sprinkled including service rooms. 1) Electrical Room is not sprinkled. 2) Telecommunication Room is equipped with telephone racks and...
    last modified by accesstocode
  • Numbering of the Electrical Code

    Can anyone tell me what style guide NFPA uses to determine the numbering of sections of the electrical code?  I am working on the Seattle Electrical Code and am needing to know how some subsections are numbered.
    last modified by jenifer.gilliland
  • As a plumber do you need EH rated shoes?

    Hi,   I've just joined and have a question about plumbing work. If I'm working on a sink with a disposal, are EH rated shoes needed. I never thought about it before but my friend mentioned that he wouldn't do a ...
    last modified by thefootfacts
  • Classification question

    The City of Napoleon is working toward modifications for our WWTP disinfection facility. The building is currently open on three sides, with a solid roof and contains two (2) ultraviolet (UV) disinfection channels. Th...
    last modified by jokuley@napoleonohio.com
  • transformer pool equipment grounding

    I have water fountain decorative NEC 2014 Section 680 Part V and for lights using pool transformer isolated primary 120V to secondary 12VAC RMS. Lights are no niche 12 VAC RMS.   Following questions: a.  T...
    last modified by apurvadave
  • Receptacles with USB ports

    We are beginning a renovation of one of our long term care units in a nursing home here in ny. The contractor wants to install decora receptacles with usb ports by the patient beds, is this an approved application by ...
    last modified by mcdowellboys4
  • OSHA - 70E Adoption

    Has OSHA adopted 70E as part the regulation? My understanding is that OSHA use 70E as their reference for enforcement. How to be safe.
    last modified by felixprbase
  • 480 Drop Connectors

    I have a question about adding quick disconnect plugs into a 480 drop. Right now we have cables going from the Bus Bar down to the equipment, Does it require a electrician to turn the bus bar off, cut it in half, add ...
    last modified by justin.trim
  • Plugging a UPS into another UPS or power conditioner

    Can anyone tell me if it is OK to plug a UPS into a Line Conditioner?  We have a fairly large piece of hospital lab equipment that a representative suggested we get a power conditioner to plug the UPS into. ...
    last modified by medina.gentry
  • Machine Frame grounding

    A machine section has a 480V motor driven roll. The motor is grounded per 430.242. Under 250.110, I say the machine frame itself needs to be grounded but the electrician says no, that’s a NFPA 79 thing. I say ma...
    last modified by kevin_wood
  • Energy Storage Systems

    Our data centre client is proposing to locate Lithium-ion batteries (energy storage system) into the server racks in the data centre halls. I have read the Fire Protection Research Foundation report from May 2019 rega...
    last modified by pcharman
  • Soow cable from ceiling

    Just need a second opinion I have a customer that has soow cord hanging from the ceiling connected to cnc machines if I am correct this is against code they have conduit running to the boxes and soow cord coming down ...
    last modified by erick.martinez
  • Good afternoon, I would like to know if there exists a code, law, or rule that indicates it is mandatory to do electrical safety inspections periodically, at buildings and homes in order to avoid home fires.Thanks in advance. Cordially, Loraine

    Good afternoon, I would like to know if there exists a code, law, or rule that indicates it is mandatory to do electrical safety inspections periodically, at existing buildings and homes in order to avoid home f...
    last modified by lorainejulio81
  • NFPA 72 Form for Mobile / Tablet

    3 votes
    Great resource here: https://docspace.io You can mobilize your NFPA 72 eform so the you can fill out the NFPA 72 form on your mobile phone or tablet. It even adds additional functionality to it. For exa...
    last modified by japagley
  • Dimensions of arc flash labels

    Hello,   The company I work for is looking to offer arc flash analyses and I've been the person selected to get everything started.  My question is regarding the labels themselves.  I've seen a lot of ...
    last modified by cmoe