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Isolation Transformer?

Discussion in 'Princess Yacht' started by Lazy Days, Dec 18, 2025 at 4:52 AM.

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  1. Lazy Days, Dec 18, 2025 at 4:52 AM
    #1
    Lazy Days

    Lazy Days New Member

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    Dec 2, 2025
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    Location:
    Tananger, Norway
    I have just bought a 1999 model Princess (Viking) 20M .

    This yacht does not have an isolation transformer on the shorepower circuit. Is it common practice not to have an isolation transformer?
  2. SplashFl, Dec 18, 2025 at 5:18 AM
    #2
    SplashFl

    SplashFl Senior Member

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    Feb 2, 2021
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    Location:
    S. Florida _ Bertram 46
    No idea if common or not but mine does not have one.
  3. ranger58sb, Dec 18, 2025 at 7:56 AM
    #3
    ranger58sb

    ranger58sb Senior member

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    Location:
    Chesapeake Bay, USA
    In our previous boat brand, they weren't commonly installed until circa 2003.

    -Chris
  4. Pascal, Dec 18, 2025 at 9:07 AM
    #4
    Pascal

    Pascal Senior Member

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    Common on smaller boats especially from “budget” builders.
  5. Capt J, Dec 18, 2025 at 9:46 AM
    #5
    Capt J

    Capt J Senior Member

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    A lot of boats your size don't have isolation transformers. Keep in mind the builder is from England and they use different electricity there. So building for the American market wasn't something second nature for them as far as electricity goes at that time.