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Transformers 24vac, 26.5vac, 27vac, etc.

NYplumber Member Posts: 503
As the title alludes, this thread is on transformers. When shopping for transformers, there are many choices. I usually pick up what the supply house carries so I am never without a few.

Which one for which application?

While on the talk about transformers, how many of you install fuses on secondary side?

Thanks in advance.


  • SWEI
    SWEI Member Posts: 7,356
    We use mostly FDI Power Supplies, which take care of a bunch of code requirements and make for a neat installation.
  • Abracadabra
    Abracadabra Member Posts: 1,948
    I think the 26.5 and 27 VAC transformers are just 24VAC. They are probably listing no load voltage which can vary between 26-28VAC.

    And no.. I don't think I've ever fused secondaries...