Tweakers' Asylum

How do I wire cooling fans

76.110.186.109

Punkuk

I need to wire 4 X 12v DC fans to one power source (gotta new project I am building a stage for my H/T and will install an amp under the stage so I was figuring on using 4 fans in a push pull configuration to aid in cooling)
The fans are 12volt 1.5 amp squirrel type.

I was going to use a 12v transformer plug but do I wire in series or parallel and how does each choice affect the power demand (voltage and amps) or is there a better way?

Thanks

Life Can Be Crule

Follow Ups:

40VA - djk 18:39:47 11/16/07 (0)
The biggest wall plug is only 40VA, you would need two for four fans.

I would get a bench top supply rated at at least 5A.
RE: How do I wire cooling fans - Ron Oehlert 20:33:19 11/15/07 (1)
With a 12v supply, you'd need to wire in parallel so each fan receives 12v (four 12v fans in-series requires a 48v supply). Simply sum the individual fan current requirement & ensure your supply can deliver that combined capacity (4 X 1.5A = 6A total). IOW you need either a 12v, 6A or 48v, 6A supply.
- RE: How do I wire cooling fans - Door Nail 17:03:48 11/16/07 (0)
  This needs to be considered in terms of watts. If he opts to series wire the fans he needs 48V@1.5A. He could also wire 2 series pairs in parallel and use 24V@3A. This is assuming he wants the fans to run at full speed. I sendom run fans at full speed due to noise considerations.

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