• 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?
    azad.musfiqul
    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...
    kgilpin@adcomfg.com
    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...
    accesstocode
    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.
    jenifer.gilliland
    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 ...
    thefootfacts
    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...
    jokuley@napoleonohio.com
    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...
    apurvadave
    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 ...
    mcdowellboys4
    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.
    felixprbase
    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 ...
    justin.trim
    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. ...
    medina.gentry
    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...
    kevin_wood
    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...
    pcharman
    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 ...
    erick.martinez
    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...
    lorainejulio81
    last modified by lorainejulio81
  • 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 ...
    cmoe
    last modified by cmoe
  • Amp reading access in a fire pump panel

    There is a local inspection company that has told several clients they need a new electrical fire pump panel because they would have to open it to get amp readings.  they are writing it up as a violation.  I...
    sgallagher4903
    last modified by sgallagher4903
  • Electric outlets in the floor

    What are the rules for floor outlets on a stage in a elementary school?  Thanks John
    sowden
    last modified by sowden
  • Relocatable Power Tap or Additional Outlet

    Hoping to hear some opinions about the dilemma.   Situation:  A home entertainment center, which now has an uninterruptible power supply.  The UPS is currently plugged into an outlet, definitely accept...
    sub3marathonman
    last modified by sub3marathonman
  • Fountain that does not share pool water

    I have permanent decorative fountain in ground for aesthetic purpose that does not have water common to pool. I see that per Part V NEC 2014 Section 680.50, Part II which include equipotential bonding only applies if ...
    apurvadave
    last modified by apurvadave