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Upgrade Circuit Breaker of Fuse?

Discussion in 'Automotive Electronics' started by Tony K, Mar 18, 2017.

  1. Tony K

    Tony K Member

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    Dec 20, 2016
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    Hi all,

    We recently discussed putting circuit breakers on my boat next to each battery x 2. As the starter draws 200 amps we decided to put 2 x fuses or C. breakers for that amount.

    However, we have also discussed this week that the engine has an element heater in the air intake, I have now sorted the switching for that but it draws 33 amps.

    This means that during the start up process there could be 233 amps being drawn, so I suppose I should up the fuses or CB's to 250amps?

    What do you think please?

    Tony K
     
  2. Tony K

    Tony K Member

    Joined:
    Dec 20, 2016
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    I think I'm being stupid here.

    If I connect the heater to the "House circuit" and battery and not the "Starter circuit" with a separate cable from the House battery, I can leave the 200 amp fuse /CB as before and just fuse the 33 amp heater circuit.

    I think I have answered my own question here?

    T
     

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