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  1. Kingstonrupp

    Cable tray bonding requirements 5kv Teck Cable

    Hello, I am intending on using aluminum cable tray for a 5kV system as my bonding conductor, which is allowed per Canadian Electrical Code. Reading through section 36, I do not see anywhere that dictates otherwise (at least not clearly). All cables are teck with separate bonding conductors. And...
  2. Kingstonrupp

    SOOW Cable for VFD Controlled Motor

    Hello, I am dealing with an expansion to an existing facility where VFD controlled motors in a washdown area have been fed powered with SOOW cables from JBs mounted at ceiling level. The service and motors are 600vac. We were planning to replicate the existing installations, but I am concerned...
  3. Kingstonrupp

    Single Phase Sourcing 480VAC VFD and Grounding

    Hello, I have come across a situation where available power on site is from a single phase 480VAC transformer with one leg grounded. There are a couple VFD loads requiring 480VAC 3-phase power. Separate single phase VFDs were purchased and de-rated to account for the additional current...
  4. Kingstonrupp

    MDS 520 Circuit Breakers

    I have a situation where we have two 1.2MW Generators feeding a 5600A bus in parallel. The generator breakers are MDS 520 and have been specified as 2000AT/2000AF. I had a senior engineer go through the single line and he was concerned that having a 2000AT trip unit installed in the 2000AF...

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