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    LED Signal Dummy load

    110v 50 or 60Hz. I'm pretty confident it is 50 though.
  2. L

    LED Signal Dummy load

    That's true, however 4 incandescent bulbs aren't easy to carry around in a tool bag or to transport in general.
  3. L

    LED Signal Dummy load

    Thanks for your reply, you seem like a railwayman yourself? This is infact a British signal head and they are powered off of 110v. You can't measure continuity if the signal head isn't there, right? However you can test the functionality of the signal head circuit and ECR, which is the purpose...
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    LED Signal Dummy load

    Is a good example.
  5. L

    LED Signal Dummy load

    This is absolutely correct. In the absence of a real signal to draw the current It'd be extremely useful to have a portable dummy to replace it.
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    LED Signal Dummy load

    It's hard to explain, or rather I'm not good at explaining. Basically in a real life situation you have a Traffic light or signal that is fed from a power box. For safety reasons you need to prove that a light is lit. This is where the current proving relay comes in, and so is cut into every...
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    LED Signal Dummy load

    Something like this. For the relay to operate then a minimum of 300mA must be drawn.
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    LED Signal Dummy load

    Essentially I'm trying to make a dummy load that will pick a current operated relay. The relay requires 300mA to pick and the feed is 110v. Would I be correct in thinking that 33W would need to be drawn? In which case what value resistor could I use to be able to use a normal LED Edit: Each...
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