• Lab Natural Gas Serrated Hose Nozzle; Hazardous Zone

    For a lab with a serrated hoze nozzle and valve for natural gas used in heating small burners, is this a hazardous zone and if so is there a hazardous zone diagram?  NFPA 497 offers some help, but not specific to...
    j_w_hines
    last modified by j_w_hines
  • Article 445 Question

    Does a Turbine fall under Article 445, specifically a Capstone C1000S?
    chiefns830
    last modified by chiefns830
  • Light above shower

    In a residential bathroom is the light over the shower required to be GFI protected?
    davidvartanoff
    last modified by davidvartanoff
  • Eaton Transfer switch? 695.3(G) [2017]

    Can someone help me? I'm being told that this is the model number for a fire pump transfer switch:   AT-V-3-LDA-3-0400-B-S-U   I can't seem to pull it up.  In addition, I'm thinking that it is just a...
    chiefns830
    last modified by chiefns830
  • Arc Flash PPE when meggering cable?

    Are you required to wear Arc Flash PPE other than shock protection when meggering cable?
    jack.barnhill
    last modified by jack.barnhill
  • 2011 NEC Question

    210.60 Guest Rooms, Guest Suites, Dormitories, and Similar Occupancies.   (A) General. Guest rooms or guest suites in hotels, motels, sleeping rooms in dormitories, and similar occupancies shall have receptac...
    chiefns830
    last modified by chiefns830
  • NFPA 72 Sec. 17.16.2.2.2 - 2019 Edition Pre-Action Monitoring

    Does section 17.6.2.2.2 of the NFPA 72 2019 edition apply to pre-action sprinkler systems?
    imran.malik
    last modified by imran.malik
  • EPS load test.

    I have a question about running the monthly load test for an EPS. I work for a hospital and I am running the load tests for our 800 KW generators. According to the compliance guy, the load must be over 30% of the na...
    shagunaa
    last modified by shagunaa
  • grounding electrode conductor connection to concrete encased electrode

    NEC 2014 Section 250.52(A)(3) states that 1/2 inch or larger rebar bonded by tie wire (20 ft or more) can be used as the grounding electrode. When attaching the grounding electrode conductor to the rebar to be encased...
    apurvadave
    last modified by apurvadave
  • Article 220-22

    Hi, i would like to know article 220-22 still available in NEC? as we can't find in our book.  Thanks
    cl_yeoh
    last modified by cl_yeoh
  • Could someone tell me if this is safe?

    Hello all.   I have an easement on my property that runs from an electrical pole on the road, back, underground about 800 feet to a neighbors yard where it stops at a transformer. There is a creek the runs perpe...
    seve.anderson
    last modified by seve.anderson
  • NEC Art. 630.23 & 630.24

    I understand dedication of hoistway, machine room, etc. branch circuits for receptacles in these spaces.  Can I put the lighting in the elevator hoistway and adjacent machine room on the same circuit?  Or ar...
    dfuhrman
    last modified by dfuhrman
  • metallic conduits for pv under roof sheathing

    In search of any reference to installing residential pv system and fastening metallic conduit to and distance required from underside of wooden roof sheathing.
    mkidwell
    last modified by mkidwell
  • LOW Voltage 12V DC NFPA Code

    Hi, I am new to the USA (from Australia) and I want to know if there is a NFPA standard that relates to 12V DC electrical wiring for Fire Apparatus and any associated equipment fitted to a Fire Apparatus.   I pu...
    geue
    last modified by geue
  • Campus emergency (NEC 700) & Legally Required Standby Systems (NEC 701) and optional systems.

    A collage campus emergency (NEC 700) & Legally Required Standby Systems (NEC 701) and optional systems. To do everything on campus.  They are asking for is to install one 700 KW natural gas generator tha...
    david.heiliger
    last modified by david.heiliger
  • 220 and 110 outlets on 1 double pole breaker (random theoretical question)

    OK So this is probably gonna sound a bit random and possibly bizarre but say if I imported a domestic 220 outlet from Europe and wanted to wire it to a double pole breaker for only one part of a house, would it b...
    chrismedellin91
    last modified by chrismedellin91
  • Installing Ethernet In My Home

    Hello,   I'm looking to install ethernet in my ~45yo house. Right now I'm looking to use unshielded Cat6a cables. I've read that 16-inch spacing between the ethernet cabling and my house's electrical wiring is b...
    benoechsli
    last modified by benoechsli
  • NEC 220.87 : KW or KVA?

    NEC 220.87 allows for the existing load to be used for load calculations as follows: The maximum demand data is available for a 1-year period. The maximum demand at 125% plus the new load does not exceed the ampacit...
    ryan.h
    last modified by ryan.h
  • Battery Back Up

    What is the standard back time of Batteries in non alarm condition and in alarm condition? 
    m.liaqat
    last modified by m.liaqat
  • 70E Question

    I have a question about format in 70E Can someone please tell me the format for measurements? (how it is written)   Is it metric (imperial) format like in NEC? Or is it imperial (metric) format like in all oth...
    chiefns830
    last modified by chiefns830