How to wire fans in series vs. parallel?

[elemental]

Hi all,

Forgive me, it's been a long time since the circuits lectures in physics. I'm having a little trouble figuring out how I would wire fans in series vs. parallel on a 3-head molex connector.

Is this right:

PARALLEL = PSU----MOLEX1 (FAN1,FAN2) ---- MOLEX2 ---- MOLEX3
SERIES = PSU----MOLEX1 (FAN1) ---- MOLEX2 (FAN2) ----MOLEX3

or is it the other way around? Or am I just totally lost?

Thanks!

[Hypernova]

Hi all,

Forgive me, it's been a long time since the circuits lectures in physics. I'm having a little trouble figuring out how I would wire fans in series vs. parallel on a 3-head molex connector.

Is this right:

PARALLEL = PSU----MOLEX1 (FAN1,FAN2) ---- MOLEX2 ---- MOLEX3
SERIES = PSU----MOLEX1 (FAN1) ---- MOLEX2 (FAN2) ----MOLEX3

or is it the other way around? Or am I just totally lost?

Thanks!

To connect two fan in series you need to have the black wire from the first fan going to the red of the 2nd. Just like batteries. Don't connect the red on the fan to black or yellow on the molex though.

I'm not sure how your "MOLEX1 (FAN1,FAN2)" is hooked up. But if you are just using splitters then it's parallel. The molex are also parallel if on the same cable.

[elemental]

oh, duh. yeah, they're all in parallel at the moment.

MOLEX (FAN1/FAN2) just refers to the fact that i would plug the two fans on top of each other, and then onto the molex. so, sort of like this:

..........FAN1
..........FAN2
====MOLEX===


...just ignore the dots. they're just space-fillers because otherwise the forums text editor just erases the spaces.