• Wire Color for Remain Energized 24VDC Conductors.

    NFPA79 specifies: 13.2.3.2 The use of other colors for the following applications shall be as follows: (1) WHITE with BLUE stripe for grounded (current-carrying) dc circuit conductor (2) WHITE with ORANGE stripe ...
    borisg
    last modified by borisg
  • Calculating Arc Flash PPE Tables

    Referring to NFPA 70E Table 130.7(C)(15)(A)(b) - Where is there more info, step-by-step, on how to go through the process in this table? I can't find any links and there's nothing in the annexes for this. I would hope...
    ral@livelinesafety.com
    last modified by ral@livelinesafety.com
  • Electrical Equipment Labeling- QR Code

    Imagine being asked to have a look at a piece of equipment that is having some issues or perhaps you might just be doing periodic maintenance and inspections. The equipment could be any number of types but I’ll ...
    Steve Benton
    created by Steve Benton
  • HOA hand switch leg direct to motor starter

       There has been some debate among my coworkers lately about the "Hand" switch leg of a rotary HOA selector switch going directly to the coil of a motor starter. I have been making the case that this i...
    jfosterjrod58
    last modified by jfosterjrod58
  • Rooftop sub panels

    I have a 100 amp breaker feeding a 60 amp sub panel on a rooftop. Would that sub panel need a main breaker or a disconnect?
    mtthwhenegar
    last modified by mtthwhenegar
  • What kind of relays are these, and what are their use?

    My professor asked us to check for the type of relay and why the wiring was done this way. I google it but I did not have any luck. Does anybody know?
    cgarciaphoto
    last modified by cgarciaphoto
  • Job risk assessment

     I am an electrician in a manufacturing facility.  There is a variety of electrical work that goes on here.  There is installation, troubleshooting, testing and calibrating.  I was wondering what i...
    bigwill400
    last modified by bigwill400
  • NFPA79 Article 13 - What wire color for current carrying grounded non-AC which remains energized

    NFPA 79 specifies colors for almost all situations except for non-AC current carrying grounded conductor which remain energized when the main supply circuit disconnecting means is in the off position.  By the way...
    ahudy
    last modified by ahudy
  • What Lies Ahead? NFPA 70E and Beyond

    As I look back to the beginning of 2018 and reflect on the work performed and the people that I have encountered throughout the year I would like to pause for a moment and ask myself a few questions, "Have I made a po...
    Steve Benton
    last modified by Steve Benton
  • NFPA 25/72 Inspections

    Sprinkler System inspections are generally addressed as two separate inspections. The first is the water based fire protection system that would typically be inspected by a sprinkler company and the second would ...
    devans2016
    last modified by devans2016
  • Main Circuit Breaker

    What is the proper method of sizing the main service circuit breaker? The method I use is 125% of the continuous load plus the sum of the noncontinuous loads.  [300ampX1.25] + [400amp] = 775A or 800A main. Some A...
    opes
    last modified by opes
  • What is a wet location?

    NEC 70 2011 requires GFCI protection for personnel (other than dwelling unit) 210.8(B)(6) in indoor wet locations What is considered a wet location? Bathroom, yes. Commercial kitchen dish washing area, yes. What abo...
    roel.cassiano
    last modified by roel.cassiano
  • Commercial System Inspector

    Cennox is a nationwide corporation looking for a  Commercial Systems Inspector.   Part- Time in the Cleveland,OH; North Dayton, OH;  Full- Time in Richmond, VA;  Norfolk, VA; St. Louis, MO 
    michelle.dyer
    created by michelle.dyer
  • Fire & Alarm Inspectors Opportunities

    @Cennox is a nationwide corporation looking for a  Commercial Systems Inspector.   Part- Time in the Cleveland,OH; North Dayton, OH;  Full- Time in Richmond, VA;  Norfolk, VA; St. Louis, MO  &...
    michelle.dyer
    last modified by michelle.dyer
  • NFPA 70B Applicatiions

    For NFPA 70B, 2010, can someone interpret for me what types of facilities this document covers? Particularly, I am investigating a fire that occurred in a small commercial establishment (4 stories with basement, maybe...
    sereemba
    last modified by sereemba
  • Evaporated Nitrogen gas is not a conductor of electricity.   How can I get this in the electrical code(s)?  Which ones?

    Greetings,     Here is what I'd like to achieve:     Evaporated Nitrogen gas is not a conductor of electricity.   (1) How can I get this in the electrical code(s)?  (2) Which o...
    denysedbq
    last modified by denysedbq
  • NFPA Conference  - BFSS Section Meeting

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    lozmun
    created by lozmun
  • Re: [Electrical] - Re: Use of multipurpose socket outlets in a Hospital

    Thanks for your reply. Please find the attachment as you asked for it in your email.  These are the multupurpose sockets.Your reply will be highly appreciated.  Thanks and regardsMonis Ansari     ...
    2917143
    last modified by 2917143
  • NFPA 99 (6.2.2.6.1 )Clarification Required

    With refer to NFPA 99 Older versions Ref  6.4.2.2.6 Wiring Requirements   6.4.2.2.6.1 Separation from other circuits .The life safety branch and critical branch shall be kept independent of all other wiring...
    vijay.r1986
    last modified by vijay.r1986
  • Hot Stick Use

    What is or is there a specific requirement to wear insulated gloves while using a hot stick to close a fuse on an overhead line or switch a transformer off or on since a hot stick is considered the primary protection.