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  • Users: BlaineVT
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  1. BlaineVT

    NFPA 72 - Sound Calcs

    I am short on time and need help going in the right direction. The AHJ wants the sound levels in each room without a horn/strobe. I indicate horn/strobes in the corridors and common spaces. I know the output for each horn/strobe: 98dBA The distance from each room to the horn/strobe varies...
  2. BlaineVT

    xfmr voltage measurements

    We have a 230V-3P-3W system. We are working on a design build project for a renovation to an existing commercial building. The owner wants an elevator, so we had the electrician double check the voltages. The electrician measured 280V L-L and 160V L-G. After some discussions, we decided to...
  3. BlaineVT

    90deg EMT elbow

    This question is so simple, I am almost affraid to ask... A coworker thinks the 90degree conduit elbow bends are no longer allowable by the NEC but I can't find where this is NOT allowable by code. We have an above ceiling area that is very tight and requires junction boxes every 360degrees...
  4. BlaineVT

    Motor Control Center

    My mechanical contractor decided to build a motor controller/disconnect for a 7.5HP, 3P, 480V chilled water pump instead of purchasing a package. All of the parts are Square D and UL labeled, but when the parts are arranged in a NEMA Type 1 enclosure I feel like something is missing as far as...

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