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  1. RDL914

    Transformers, K-rating, and Efficiency

    Hello All, This is my first post so bear with me. I've been asked to do some very preliminary research into transformer efficiency and determine if utility cost savings can be obtained by swapping out old transformers with new, "energy efficient" transformers. I am not designing a system by...
  2. RDL914

    Need Minimum Clearance - 208V Bolts?

    Does anyone know the the minimum clearance of open air 208v conductors? I have an STS with B & C phase bolts that are too close together and I need to know how much space between I need. Picture attached. Couldn't find it in NEC 2008. Thanks.

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