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air conditioner compressor oil and my setup

A place to ask general spud cannon related questions.
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Unread postAuthor: elitesniper » Wed Dec 09, 2009 9:36 pm

would radio shack carry 15uf ones? if so how much do they usually go around for?
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Unread postAuthor: c11man » Thu Dec 10, 2009 6:36 pm

i dont know that radio shack carries any start/run caps. just make sure its a start or run capacitor before you buy
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Unread postAuthor: rp181 » Thu Dec 10, 2009 6:42 pm

radioshack will not carry. try a industrial supply store, or order online.
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Unread postAuthor: elitesniper » Thu Dec 10, 2009 11:07 pm

so this will be appropriate for the air conditioner compressor ?
http://cgi.ebay.com/CAPACITOR-REFRIGERA ... 3ca7cf5808
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Unread postAuthor: elitesniper » Fri Dec 11, 2009 8:42 pm

Hey i recvied my compressor:} what does you 15uf cap look like? can you take a picture and post it?
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Unread postAuthor: c11man » Tue Dec 15, 2009 9:32 pm

a pic would not help at all because they come in all differnt sizes and shapes, my has a way over the top voltage rating of 370v and you only need like a 150v. so that might be why mine is so large. its about 2.5inches wide, 3/4 deep and 4inches tall. its in a metal case
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Unread postAuthor: elitesniper » Tue Dec 15, 2009 10:10 pm

oh ok do you have the wireings schematic ?
yours something like this? http://cgi.ebay.com/POC15-Oval-15-mfd-u ... 588487c7be
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Unread postAuthor: kenbo0422 » Wed Dec 16, 2009 12:13 pm

a way over the top voltage rating of 370v and you only need like a 150v.


Its rated at 370v because the peak to peak voltage in 110ac is 170 volts and the startup cap gives you a 'storage voltage' boost when the motor turns on. Its just so you don't over work the capacitor and have it blow on you just when you need it most.
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Unread postAuthor: dewey-1 » Wed Dec 16, 2009 2:45 pm

kenbo0422 wrote:
a way over the top voltage rating of 370v and you only need like a 150v.


Its rated at 370v because the peak to peak voltage in 110ac is 170 volts and the startup cap gives you a 'storage voltage' boost when the motor turns on. Its just so you don't over work the capacitor and have it blow on you just when you need it most.


Well actually peak to peak is 2 times peak.

rms x 1.414 = peak
rms x 2(1.414) = peak to peak.

370/2 = 185 vac peak

185/1.414 = 130.8 vac rms max.

110 vac has a typical range of 95 to 125 vac rms
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