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Permanently wiring in christmas lights - fusing

Discussion in 'Electronic Basics' started by Jermin, Apr 27, 2004.

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  1. Jermin

    Jermin Guest

    Hi, I'm wiring some decorative mini string lights (basically the same
    as christmas lights - approx. 18 lights of 7 v each) into a switch, so
    I can just flip a switch whenever I want them on. This involves
    cutting the plug off the string lights and wiring it into a wall
    switch (inside a junction box of course). To protect from overloading
    the wire/lights I am planning on replacing the 3 amp fuse that was in
    the cut off plug with an inline fuse of no more than 3 or 4 amps. The
    confusing thing is that the plug contains 2 fuses, not one. Why did
    the manufacturer of the Xmas light strings fuse both the hot feed and
    return lines? Isn't it perfectly safe for me to just fuse the hot feed

  2. Rileyesi

    Rileyesi Guest

    Hi, I'm wiring some decorative mini string lights (basically the same

    Was it a 2 prong plug? If so, is one prong larger than the other? The only
    reason I could see that the manufacturer did that was to account for the user
    inserting the plug in either orientation.

    On teh power supplies we make we fuse only the AC hot side. Fusing the AC
    neutral, to me, seems dangerous.

    Just my 2 cents. Take it for what it's worth!
  3. Jermin

    Jermin Guest

    The prongs are equal in size, so I think your guess is a very good
    one! I ended up only fusing the hot side.
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