Wiring a few fans in a series or parallel

i found both a 12vdc output and a 30vdc output just wondering what would be my best option for wiring a couple of 12vdc cpu fans together

punkrockdude said:

i found both a 12vdc output and a 30vdc output just wondering what would be my best option for wiring a couple of 12vdc cpu fans together

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i don't know but I would gess using a 12vdc would be better for 2 fans insted of 30vdc

Use the 12vdc for the 12vdc fans of course. I would wire them in parallel so if one fails the other still works.30vdc would fry them.

ok but parallel will allow them to have 12vdc each?or 4 vdc each

punkrockdude said:

ok but parallel will allow them to have 12vdc each?or 4 vdc each

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12 vdc would be the max i'd use for 1 fan so 2 fans on a 12 vdc should work to

remember this , any fan that has a rating like 4 vdc, 8 vdc , 12vdc or what ever, thoes numbers are there so that you don't go over that and fry the fan faster

12vdc , it's doesn't change, voltage is constant, amperage will vary with load.

Well were is ur 12 v come from, a power surge? batterie or bettery charger

thanks again spaz ill see what i can do!+rep

punkrockdude said:

i found both a 12vdc output and a 30vdc output just wondering what would be my best option for wiring a couple of 12vdc cpu fans together

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If you have 12V fans and want to run them both from one supply you have to connect them in parallel to a 12V source. That will provide 12V per fan, and they will each draw whatever current they want depending on their resistance (assuming your supply has enough capacity for two fans). Same thing if both fans are 30V (use a 30V supply and wire fans in parallel).

If you wire the fans in series the voltage will drop across each fan according to how much current each draws (V = I * R where V is your supply voltage, I is the fan current, and R is the fan resistance). Although the fan blades may still rotate, they won't spin as fast as they are supposed to. Wiring things in parallel produces the same voltage across each device ... wiring them in series produces the same current through each device.