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the shower unit reads: 220v-5500 30A 4mm2/10AWG .

The present wire installation is 30A breaker with #10 wire for about 30 feet, connected to #12 wire for another 6’ to the shower head.

  1. Can I use this shower unit on 110?.
  2. with 20 or 30 Amp breaker?
  3. With the same wire installation?
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  • A picture of the name plate on the heater, a link to the instructions, and a picture of the heater itself, all edited into the question would help a lot.
    – FreeMan
    Commented Oct 10, 2022 at 14:57
  • If I add another 6’ of #10 to the shower head, instead of the #12 is that a solution? Commented Oct 10, 2022 at 14:58
  • Where are you? Electrical service is 120/240V in the U.S. I assume you wouldn't have mentioned 110 if you weren't in the U.S. Is your unit intended for the Euro market? Specs of 220V are not common (though 230 is).
    – isherwood
    Commented Oct 10, 2022 at 15:01
  • You can't upload images until you have some reputation. Upload to somewhere else and put a link in your post.
    – isherwood
    Commented Oct 10, 2022 at 15:01
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    On 110/120, you'd only get 1350W (Half the volts, so half the current, so one quarter the power.)
    – Ecnerwal
    Commented Oct 10, 2022 at 15:51

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