AC Mains and fuse placement

Discussion in 'General Electronics Chat' started by stpx, Apr 5, 2011.

  1. stpx

    Thread Starter New Member

    Dec 31, 2010
    7
    0
    Hello

    I'm confused about fuse placement in an electronic device,
    In case the end user doesn't know what is a neutral/hot line and power plug/socket leads are symmetrical (plugs in both ways).

    I thought of fusing both lines but
    Is it possible for a fuse on the neutral to break before the one on the hot line leaving the device connected to the hot?
    Possibility of both breaking? or will it always be the one on the hot breaking first?

    Thanks a lot!
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Are you in the US?
     
  3. stpx

    Thread Starter New Member

    Dec 31, 2010
    7
    0
    nope I'm not.
     
  4. debjit625

    Well-Known Member

    Apr 17, 2010
    790
    186
    We normally use fuse on hot line so that the circuit get disconnected in an event of over current.If you put fuse on both the line then its hard to say which one will blow first but if the neutral one blows first then the device will be on a hot line (you should not do it).

    Good luck
     
  5. stpx

    Thread Starter New Member

    Dec 31, 2010
    7
    0
    Thanks
    Guess I'll fuse one line,use a polarized plug and wire the outlet socket accordingly.
     
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