Fuse Problem

Discussion in 'The Projects Forum' started by Lightfire, Apr 23, 2011.

  1. Lightfire

    Thread Starter Well-Known Member

    Oct 5, 2010
    690
    21
    Power: Lead-Acid Battery 12 volts/12 AMP-HOURS

    Loads: 1 piece of 50W/12V Halogen Lamp, 2 pieces of 20W/12V Halogen Lamp, and 1 piece of 25W/12V incandescent lamp.

    Fuse: 12V/5A

    Total all, my loads are getting approx. 9.5 amps... Eh? why the fuse is not meliting??? :(

    Maybe ion wire problem or what???

    Thanks!!!
     
  2. Lightfire

    Thread Starter Well-Known Member

    Oct 5, 2010
    690
    21
    Update: The main wires and all the wires with the exception of wire of the 25W/12V incandescent lamp are getting hot!!!!!!!!!!!!!!!!!!!11!!!!
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Be very careful with wiring connections. Hot wires and hot wiring joints can cause fires.
     
    Lightfire likes this.
  4. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    The battery is not rated to produce 12A. It is rated to produce only 600mA for 20 hours.
    Its voltage might be only 10V with your 9.6A overload (but with only 10V the current might be only 8A or less.

    But the wires get hot so they are too thin and have a high resistance that reduces the total current to less than the 5A rating of the fuse.
     
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