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Old 23rd August 2010, 10:16 PM   #1
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Default Need help for wire thickness for power caps

Im going to install two power caps that don't fit the pcb into my amp.
I will connect them by soldering short wires from each cap into the pcb.

I have a few 1mm thick wires (hard wire, not fibers), will it be enough for
two 10,000uF 50v caps?
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Old 23rd August 2010, 10:30 PM   #2
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That's about 20AWG over here. Might be just a little bit small for mechanical reasons but otherwise OK.
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Old 25th August 2010, 10:04 PM   #3
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Well, how much will the peak discharge current be? Or continous? Then we can tell you better. (Or you can google "AWG current capacity" and get an idea what size wire would be good. You don't want the wire to melt, or its insulation to melt, or to introduce more resistance than what you had in mind to the circuit).
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Old 25th August 2010, 10:41 PM   #4
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I don't know what the discharge current will be, im not an expert on electronics.

Is there a difference between copper wire and silver color wire?
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Old 26th August 2010, 02:08 AM   #5
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Bare 20AWG wire can handle over 20 Amps continuous. Insulated it can handle 10 Amps continuous. Either condition is highly unlikely at that point in the power supply.
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Old 26th August 2010, 06:58 AM   #6
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Quote:
Originally Posted by Speedskater View Post
Bare 20AWG wire can handle over 20 Amps continuous. Insulated it can handle 10 Amps continuous. Either condition is highly unlikely at that point in the power supply.
How do i convert 20AWG to mm?
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Old 26th August 2010, 11:26 AM   #7
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Don't worry about it. Your 1mm wire is bigger and will work perfectly.
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Old 26th August 2010, 12:07 PM   #8
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by rg12 View Post
Is there a difference between copper wire and silver color wire?
copper wire can come plain, or insulated, or plated.

The plain copper oxidises quickly and the ends need to be cleaned to allow soldering. Old stranded copper wire cords/cables gradually go black as the oxygen permeates through the insulation. These are very difficult to clean and very difficult to solder reliably.

Insulated can be an enamel coating (thin paint like substance) or an insulating tube. Again the insulation needs to be removed to allow soldering.

Plated comes in three common forms: Tin plated (Sn), Tinned (Sn+Pb), Silver (Ag) plated. All these protect the copper from corroding and all can be soldered without further cleaning.
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Old 26th August 2010, 03:29 PM   #9
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Well, i did it with a 2mm thick copper wire (it's not plated or insulated, just
regular rubber insulation).

I used flux while soldering, everything came out sounding great, much cleaner sound.
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Old 26th August 2010, 05:57 PM   #10
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Opps, I wrote that 1mm was about 20AWG.
But checking now I see.

18AWG is 1.02mm
20AWG is 0.813mm
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