Ac reverse cycling unit question

Discussion in 'Electrical Stuff' started by jon and michie, Oct 20, 2021.

  1. jon and michie

    jon and michie Member

    Jul 25, 2016
    2005 280/315 sundancer
    single Volvo kad 300 diesel
    Hi I have a 2005 280 sundancer - I have found this large red wire behind the main board in the cabin that appears not to be connected to anything.

    My question is could this have been used to power the ac cycling unit ? mine doesnt have that option installed under the galley seat but wondering if at the factory the electrical guys fitted as standard so when a boat is ordered and that option is added then its astraight forward hook up.
    Here is the wire in question.



    Many thanks for any help you can give ( I will also post this in the sports cruiser thread)
  2. bahamabreisus

    bahamabreisus Well-Known Member

    Oct 25, 2007
    Hampstead NC
    500 dancer, previous 420,390,300 dancers
    detriot 8v92
    That looks like 12 volt wiring, not 120 volt.
  3. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    That looks like a simple power post connection... a way to join two large gauge cables together. In other words, if you follow the wires, they are connected at their other ends, right? And, as pointed out, it's 12V.

    But the answer to your "thought"... no, that's not all that's involved. Adding ac/heat involves not only wiring, but also plumbing and ductwork.
    Last edited: Oct 20, 2021
  4. km1125

    km1125 Active Member

    May 5, 2021
    Cummins QSB6.7
    As previously mentioned, that's probably a 12VDC line, not a 120VAC which would be used for any HVAC (air conditioning or reverse-cycle heat).

    If that's the only wire on that block, it's probably a "helm" feed for loads you might want to add in the future. Nice big wire to handle a variety of loads with minimal voltage drop.

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