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Old 02-09-2011, 08:50 PM   #1
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Electric motor/capacitor hookup help


I'm working on building a small waste oil burner to experiment with-its going to be a siphon type that utilizes compressed air to atomize the fuel through a nozzle. I bought a small compressor from a surplus house and it came with a wiring diagram showing two black wires (to 120V), one green wire (ground), and two blue wires which go to a capacitor which was included. Here is the motor:



Here is the capacitor:





You can see in the second picture that there are two contacts each with two prongs. I'm assuming that one blue wire goes to one set of contacts and the other goes to the other set? I just don't want to hook this thing up backwards because I'm afraid of blowing up the capacitor, motor, or both. Also, do I have to be careful handling the capacitor-I know that they can store quite a bit of power, but I don't know if this one is "full" or not. Any ideas?

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Old 02-09-2011, 10:17 PM   #2
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Electric motor/capacitor hookup help


Each pair of prongs within the circle are two contacts to the same point. Hook the cap to one prong in each circle.

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Old 02-09-2011, 10:18 PM   #3
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If you look at the terminals you will see that the two are tied together on each set. In other words you only have two terminals but two connections for each. If you are worried about the cap just short the two terminals together with a screw driver to discharge the cap.
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Old 02-10-2011, 08:55 AM   #4
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Originally Posted by hayewe farm View Post
If you look at the terminals you will see that the two are tied together on each set. In other words you only have two terminals but two connections for each. If you are worried about the cap just short the two terminals together with a screw driver to discharge the cap.
That's what I figured, but I'm not that familiar with capacitors so I thought I'd check. Thanks!
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Old 02-10-2011, 10:00 AM   #5
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Originally Posted by Badfish740 View Post
That's what I figured, but I'm not that familiar with capacitors so I thought I'd check. Thanks!
If you are not familiar with capacitors, be warned, once plugged in, the capacitor holds a charge even when unplugged, always ground the capacitor to discharge before touching any of its connections!!!!

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Old 02-10-2011, 10:46 AM   #6
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If you are not familiar with capacitors, be warned, once plugged in, the capacitor holds a charge even when unplugged, always ground the capacitor to discharge before touching any of its connections!!!!

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Do you 'ground' it? Or do you connect (short) the terminals to release the charge?

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Old 02-10-2011, 11:28 AM   #7
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Yes you short the terminals, symantic's, folks just jump right in to correct, love it.

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Old 02-10-2011, 11:33 AM   #8
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Yes you short the terminals, symantic's, folks just jump right in to correct, love it.

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You never know when someone (not necessarily this OP) will take a capacitor and shove it into the dirt!!!
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Old 02-10-2011, 11:37 AM   #9
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You never know when someone (not necessarily this OP) will take a capacitor and shove it into the dirt!!!
Well if it were wet dirt it would work
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Old 02-10-2011, 12:17 PM   #10
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Well if it were wet dirt it would work
LOL...If I was that clueless about electricity I wouldn't be trying to build my own waste oil burner Wiring, circuit breakers, GFCIs, switches, fuses, etc...I'm fine with, I just know enough about capacitors that they could be potentially dangerous if not handled correctly.
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Old 02-10-2011, 12:27 PM   #11
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Well if it were wet dirt it would work
You mean mud?
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Old 02-10-2011, 12:44 PM   #12
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You mean mud?
Well wet dirt usually is mud, again those symantic's man you just can't miss an opportunity can ya.
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Old 02-10-2011, 12:46 PM   #13
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Old 02-10-2011, 12:58 PM   #14
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symantics, perhaps semantics? Or, perhaps a virus is involved? I was a bit confused at first.
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Old 02-10-2011, 01:01 PM   #15
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symantics, perhaps semantics? Or, perhaps a virus is involved? I was a bit confused at first.
Yep you cot me, ah chew, or was it a spellin air.

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