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Thread: 120/208 vs 120/240

  1. #21
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    Just get a transformer that takes 208v on the primary side (two legs of the three-phase system) and have it step down to 120/240.

  2. #22
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    Jun 2006
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    Quote Originally Posted by adamscb View Post
    Just get a transformer that takes 208v on the primary side (two legs of the three-phase system) and have it step down to 120/240.
    That'd actually be a step up transformer... 208 to 240.
    I'll never get there. No matter where I go, I'm always here.

  3. #23
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    Quote Originally Posted by Smart $ View Post
    That'd actually be a step up transformer... 208 to 240.
    Right

  4. #24
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    Feb 2008
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    Blackfoot, Id
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    Is there a load in the booth that actually requires a single phase 240 VAC circuit. I would think that a hearing booth would have only 120 VAC requirements. Therefore, pulling 2 legs off the 208 system to a 1 phase panel to serve the booth would be sufficient.

  5. #25
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    Jul 2006
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    San Francisco, CA, USA
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    Quote Originally Posted by kda3310 View Post
    This is our plant administration offices. It is all 3 phase 208. They want to hook up a mobile hearing test booth to it that has been running on a 1 phase 120/240 generator. I don't know what the both requires. I'm only doing what my boss is telling to do. I'm hoping there is not going to be any problems.

    Sent from my XT1565 using Tapatalk
    Chances are everything in there is actually 120V loads, but even if not, it will be electronic and most modern electronics now use switching power supplies that will not care, with the newest being capable of anything from 110-277V input without even needing to flick a switch. You should still always check to be sure, but don't run out and buy a buck-boost xfmr until you know for SURE that you need one.
    __________________________________________________ ____________________________
    Many people are shocked when they discover I am not a good electrician...

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