Relays

Discussion in 'OnBoard Electronics & Controls' started by bcervelo, Jul 17, 2017.

  1. bcervelo
    Joined: Sep 2005
    Posts: 64
    Likes: 1, Points: 8, Legacy Rep: 13
    Location: Somerset West, SA

    bcervelo Junior Member

  2. CDK
    Joined: Aug 2007
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    Location: Adriatic sea

    CDK retired engineer

    Although specified for AC, these relays can also switch DC loads, 30A for a make contact, 20A for a break contact. It is a lot cheaper to use automotive relays, 30A or 50A with 12V coils.
     
  3. owene
    Joined: Aug 2009
    Posts: 20
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: Nelson, NZ

    owene Mr Owen Charles

    In my view, relays have no place on a boat unless they are 100% waterproof, of MIL spec and fused in the closed position with their coil terminals removed.
     

  4. IronPrice
    Joined: Jul 2017
    Posts: 123
    Likes: 3, Points: 18
    Location: NZ

    IronPrice Senior Member

    In my experience .... I have two solid state relays installed in my boat to control the manual circuit on my bilge pumps (auto circuit is always on) and they are working just fine.

    I enclosed them in an IP67 enclosure mounted in a protected location. They are so far (a few months old) 100% reliable. But I have included bypass switches just in case.
     
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