• Nozzle placement and limitations in NFPA 2001 for clean agent fire suppression system

    I need advice on the following two questions:   1. Recently we concluded an installation on the Novec1230 fire suppression system. However, once our installation has finished, the other contractor namely the Ele...
    niranjan.boteju
    last modified by niranjan.boteju
  • NFPA-79 Wire Color Code

    The NFPA-79 Wire Color Code is important for any person to quickly identify Circuits.  Consequences of using the wrong Wire Color could be lethal.   The NEC calls out (3) Colors:      * ...
    rcramereleceng
    last modified by rcramereleceng
  • PVC pipe on standpipe system

    Good day all, What is your experience using PVC SCH40 pipe on standpipe systems? eg for hose reels? Although NFPA 14 does not reject it's use, I am concerned about its heat resistance.    Thanking you in ...
    kavir
    last modified by kavir
  • UL Listed pipe

    Hi, Is it necessary for the Fire sprinkler black steel pipes to be UL listed although it is conforming with ASTM A53 standard as per NFPA 13 7.3.1.1.? If the answer is yes, in which code can I find such information? ...
    waelio
    last modified by waelio
  • NFPA has new representation in the Middle East and North Africa to further safety, enforcement, and communication efforts

    Effective this week, NFPA has a new local representative who will oversee the overall regional planning, direction, coordination, and support of international development functions in the Middle East and North Africa ...
    cathylongley
    created by cathylongley
  • Combine Exit Stair Enclosure and Lift Shaft Pressurization System

    Is it acceptable to combine exit stair enclosure and lift shaft pressurization system in one pressurization system? The pressurization system will consist of one duty fan and one standby fan. There is a li...
    hamad.koroni
    last modified by hamad.koroni
  • I am trying to apply Table 130.7(C)(15)(A)(a) of NFPA 70e

    I am trying to apply Table 130.7(C)(15)(A)(a) of NFPA 70e to my scenario.  I need to open hinged covers on a control cabinet to reset faults on VFD's occasionally.  These control cabinets usually have 480V c...
    brian.calvert
    last modified by brian.calvert
  • define section 605 in 2015 international fire code

    I'm installing a interactive solar photovoltaic sysyem 53.460 kWpdc Winston-Salem North Carolina   Fire Plan reviewer is requiring a center-line axis in both axes of the roof. 605.11.1.3.2 (2) I fully understan...
    jetchells
    last modified by jetchells
  • NFPA 59A distance requirement clarification

    Hello!   In NFPA 59A is there a 50 ft distance requirement from sloped LNG trenches (underneath LNG piping) to closest source of ignition such as generators, Electrical MCC equipment or Thermal oxidizers? C...
    sramanathan
    last modified by sramanathan
  • NFPA President calls on government leaders to act on wildfire safety

    In light of the recent experience of devastating wildfires in California and the ongoing tragic loss of lives, natural habitat, and property in Australia, NFPA President and CEO Jim Pauley has issued a call to action ...
    michelesteinberg
    last modified by michelesteinberg
  • When do you have to have voice messaging in audible alarm notifications (Assembly Occupancy)?

    I have been scouring NFPA 101 and NFPA 72 and have not been able to determine when an assembly occupancy must add voice to their fire alarm system. Any help in pointing me towards the right portion of the code I would...
    jzour
    last modified by jzour
  • Listed Equipment Installation

    I am installing milling equipment in a flour mill in the United States but the manufacture of the equipment is European and the equipment itself does not have a Nationally Recolonized Testing Laboratory label on it.&#...
    bscott.contracting
    last modified by bscott.contracting
  • The Augusta project: A groundbreaking active shooter and hostile event response program kicks off in Georgia

    Hardie Davis, Jr., mayor of Augusta, Georgia, speaks during the First Annual Central Savannah River Area Active Shooter/Hostile Event Response Training Symposium in downtown Augusta on January 16.  As the s...
    averzoni
    created by averzoni
  • Compliant EMT alternatives when connecting residential rooftop solar arrays?

    Hello Xchange Members,   I work in residential solar.  When DC conductors are run on the roof between solar arrays, the conductors are usually routed in EMT.  Does the NEC allow for other types of cond...
    duncan.cleminshaw
    last modified by duncan.cleminshaw
  • NFPA 211 "Qualified Agency" question

    According to NFPA 211 Qualified Agency is any individual or company that is engaged in connection venting repair, installation, service .....and has experience in such work.  Does that person need a specific cert...
    talibensenior3
    created by talibensenior3
  • Presidents Report

    Greetings!   I trust we’ve all had a great early winter and are looking forward to the coming spring and summer. Winter is a slow time for many of us and for me it is an exciting period.  In late Jan...
    ssawyer
    last modified by ssawyer
  • Who can do maintenance?

    Isn't there a reg that allows for property managers and engineers to perform maintenance on their own systems?  Obviously we understand inspections, etc. must be done by licensed personnel...
    javenmarg
    last modified by javenmarg
  • NEC 250.122B EGC Size

    I am trying to understand what base size we are supposed to use when we need to proportionally increase the size of the Equipment Grounding Conductor (EGC) per NEC 250.122B. Let’s say the following scenario: Bre...
    rafis
    last modified by rafis
  • Dissecting the Details: NFPA 99 2015 and 2018 Editions Categories

    A wonderful discussion with my friend michael.civitello inspired this conversation.   Michael pointed out that moderate sedation is permitted in both NFPA 99 2015 and 2018 Category 2 and 3 medical gas systems.&#...
    quikag82
    last modified by quikag82
  • NFPA 110 7.2.2

    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...
    stella
    last modified by stella