Fluorescent Ballast

Discussion in 'The Projects Forum' started by koolchiq, Jun 15, 2013.

  1. koolchiq

    Thread Starter New Member

    Jan 23, 2011
    24
    1
    I want to replace a fluorescent tube ballast but i got confused. The old ballast has 4 wires: 1- live, 2 & 3 going to one side of the tube (end cap), 4- going to the other side (end cap) of the tube via a capacitor. The Neutral is also. connected to this side of the tube.

    The replacement ballast has 6 wires numbered 2 to 5 and two wires labelled AC (not colour-coded). The diagram on the ballast shows wires 4 & 5 going to one side of the tube, 2 & 3 come from the other side of the tube. Then there are 2 , labels, AC input supply and AC 160V-254VAC.
    How do I connect these 6 wires in place of the original 4 wires?
    I have included the wiring shown on the ballasts.
    Thank you.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,646
    2,345
    Hello,

    The doc-file does not contain the expected schematics/drawings.
    You can better upload a schematic in the .png format.

    Bertus
     
  3. wayneh

    Expert

    Sep 9, 2010
    12,094
    3,033
    It was buried behind other stuff, but I think this is what was intended. Looks like I chopped a little off the "L" and "N" on the far left.
    [​IMG]
     
  4. koolchiq

    Thread Starter New Member

    Jan 23, 2011
    24
    1
    That is correct Wayneh. There are 2 AC wires: AC input supply and AC 160V-254VAC. None of the wires are colour-coded.
     
  5. absf

    Senior Member

    Dec 29, 2010
    1,492
    371
    [deleted]

    Allen
     
    Last edited: Jun 15, 2013
  6. Ramussons

    Active Member

    May 3, 2013
    557
    92
    The working circuits of the 2 ballasts are different. Just follow the instructions: 4 & 5 going to one side of the tube, 2 & 3 to the other side of the tube. Two wires labelled AC to AC input.

    Ramesh
     
  7. koolchiq

    Thread Starter New Member

    Jan 23, 2011
    24
    1
    Thanks Ramesh for the reply. The problem here is that I am replacing an existing ballast. 4 & 5 have no problem. On the old one the other side of the tube was fed by an incoming NEUTRAL and one ballast wire via a capacitor. So on the new ballast, although 2 & 3 go to this other side of the tube, how do i know which one to connect to the NEUTRAL. Or do I disconnect the existing incoming Neutral altogether. Also do I do away with the capacitor?
    Also since there are two AC wires do I wire them together on the same terminal with the incoming LIVE?
    I am baffled.
     
  8. Ramussons

    Active Member

    May 3, 2013
    557
    92
    Disconnect all existing wires including the Neutral and the capacitor. Connect 4 & 5 going to one side of the tube, 2 & 3 to the other side of the tube. Connect the AC wires to mains - does not matter which is live.

    Ramesh
     
  9. koolchiq

    Thread Starter New Member

    Jan 23, 2011
    24
    1
    Thanks a lot Ramesh. Will try that one.
     
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