• Table 310.16 vs. Article 400 for a 3-conductor VFD cable?

    Hi,   I am working on a project in which I will be using a VFD to drive an AC motor.  For the motor power cable from the VFD to the motor, I am planning to use a cable with a braided shield that is specifica...
    pwk@kraemerkoating.com
    last modified by pwk@kraemerkoating.com
  • 480 VAC VFD Power - Do I need an Enclosure & Disconnect?

    Hi,   I work for an equipment manufacturer.  For a machine we are building, I have a VFD for an Exhaust Blower that requires 480 VAC 3-phase 6 amps.  The VFD is designed so that it can be mounted on a ...
  • Height for Smoke Spot detector

    Hello; Regarding the installation of smoke sensors in rooms with flat and high ceilings (20 feet), what is the maximum height at which I can use this type of device. They are air-conditioned rooms. We are working with...
    jcleiva
    last modified by jcleiva
  • Question regarding generator placement for NFPA 37

    Hi - I am looking to install a whole home standby generator (Cummins RS22) and I've read the forums here about Section 4.1.4 of NFPA 37, but there are a couple of items that are not clear to me.  The text st...
    bruehlt
    last modified by bruehlt
  • ENCLOSING ROOM

    Hello Community   Aroom enclosing fire pumps is a room with roof, walls and hvac system or I can consider that description for a shelter (just roof without walls).   Sincerely DS
    diogofse24@hotmail.com
    last modified by diogofse24@hotmail.com
  • SPRINKLERS FOR FIRE PUMP ROOM

    Dear Community   I want to know the following answers for the questions:   1. Is it necessary that pump room (room with roof, no walls) has sprinklers with foam?  2. Can these sprinklers with foam pr...
    diogofse24@hotmail.com
    last modified by diogofse24@hotmail.com
  • Generator Enclosure Egress

    At our facility we have two 2 megawatt medium voltage generators installed outside in manufacturer provided enclosures that we can enter and walk around inside. Each enclosure has 3 doors with panic bars and 2 doors i...
    millerpj
    last modified by millerpj
  • How to figure out who the fire alarm system monitoring company is?

    Hi. I am a resident of a multifamily apartment complex. I have had multiple issues during move-in, and I'm not very confident in how the complex operates.    A couple days after I moved in, two fire trucks ...
    catchallemail9
    last modified by catchallemail9
  • Needing some book research help

    Hi, everyone;   I'm in the beginning stages of planning another book tentatively titled "Fire Departments and Communities." The topic will cover how fire departments perceive and respond to risks across communit...
    jrmtchll
    last modified by jrmtchll
  • Working 120v Live

    When working 120Volt Circuits live Receptacles, switches what PPE is required?
    justin.grantham
    last modified by justin.grantham
  • As students attend school remotely this fall, NFPA urges added caution around using and charging laptops and other electrical devices at home

      With many students returning to school remotely this fall, NFPA is urging added caution when using and charging laptops and other digital devices at home. Many households may have more people using and chargin...
    susanmckelvey
    last modified by susanmckelvey
  • Containers for Combustible waste

    I need to know what can I use as a container for combustible waste, plastic or metal with lid of course. They will have rags that have thinner, paint and some cleaners from aerosol on them?
    david.sparkes
    last modified by david.sparkes
  • NEC 210.71

    For an existing conference room where the Architect required adding an outlet, the plan check person has required outlets as per this article, which requires quantity as in a residence.  In addition, it requires ...
    j_w_hines
    last modified by j_w_hines
  • What is the Secret about Private Operating Mode?

      Everyone is familiar with the sound of a fire alarm and flash of the visual notification thanks to drills that are required at schools and the workplace. They are typically designed in a way so that everyone c...
    boconnor
    last modified by boconnor
  • FDC Pipe Size

    Hello,    I am looking for an official interpretation regarding NFPA 13's FDC Pipe Sizing Guidelines. 8.17.2.3 gives contradictory and unclear guidance for this matter and I am in need of NFPA's interpretat...
    aten
    last modified by aten
  • Following an Explosion at a Cannabis-Related Business in Los Angeles, Records Indicate No Inspections Conducted at Facility

    Keeping communities safe from fire, electrical, and other related hazards isn’t something that just happens—it’s the result of having a fully functioning Fire & Life Safety Ecosystem.  When ...
    ncomeau
    last modified by ncomeau
  • 240.21 feeder tap directly to utilization equipment?

    Since the 2014 edition, 240.21(B)(1)(1)(b) has allowed a 10 ft feeder tap to terminate on "equipment containing an overcurrent device" as an alternative to terminating directly on an OCPD.   I would like to conn...
    cfharr
    last modified by cfharr
  • qualified observer

    I have a question.  If there is a crew going out to do some  electrical maintenance. But only one member of the crew is a qualified electrician. do the other people assisting him need to have CPR and other ...
    jrendon6861
    last modified by jrendon6861
  • Fire Safety Messaging is Critical During a Pandemic

    As the COVID-19 pandemic has continued over the past several months, I, like so many others have been carefully monitoring the data and following recommendations from leading epidemiologists and public health experts ...
    lorrainecarli
    last modified by lorrainecarli
  • FLOW REQUIREMENT FOR CLASS II STANDPIPE

    As per NFPA 14 clause 7.10.2.1.1 "For Class II systems, the minimum flow rate for the hydraulically most remote hose connection shall be 100 gpm (379 L/min)."   My question is whether we have to provide 100...
    abdulrafay80
    last modified by abdulrafay80