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  1. CeliaNeil

    Bus Bar Bracing in 480V Switchboard

    This is a great resource, as I have referenced it many times concerning copper bus bars, the joining of, the bolt hole patterns etc. However, once again, the topic of "where to brace" is very vauge. For instance, Ul 891 states for a system to be rated at 100k, the bus should be supported no...
  2. CeliaNeil

    Bus Bar Bracing in 480V Switchboard

    Does anyone have a legit chart, spec, anything to go by for bracing bus bars for 150k? I've looked at UL 891, ABS, IEEE, NEC, nothing except UL 891 calls out specifics on the bus bar bracing, and that is only up to 100k. I am designing a 480V switchboard to be rated for a fault current of...

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