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General => General Technical Chat => Topic started by: nes999 on January 04, 2019, 05:25:38 pm

Title: Used server power supply
Post by: nes999 on January 04, 2019, 05:25:38 pm

I recently purchased a used 12v 69 amp server power supply. It came without a cord. It seems like all the power cords I'm finding are 16 and 14 AWG. Is that really what they need?



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Title: Re: Used server power supply
Post by: 6PTsocket on January 04, 2019, 05:36:50 pm

Quote from: nes999 on January 04, 2019, 05:25:38 pm

I recently purchased a used 12v 69 amp server power supply. It came without a cord. It seems like all the power cords I'm finding are 16 and 14 AWG. Is that really what they need?



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In VERY broad terms and disregarding a number of factors that's 6.9 Amps at 120 volts so the cords you mention should work fine.

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Title: Re: Used server power supply
Post by: Richard Crowley on January 04, 2019, 05:49:55 pm

Please complete your user profile to at least reveal what country you are in.
So that we know what is your mains voltage?

Ohm's Law says....
12V @ 69A = 828W

Of course, no power supply is 100% efficient.
So, lets say 900W power drawn from the mains at peak load

900W @ 120V = 7.5A
900W @ 240V = 3.75A

So, any power cord rated for 15A would do the job nicely for either mains voltage.

Title: Re: Used server power supply
Post by: nes999 on January 04, 2019, 05:53:20 pm

Quote from: 6PTsocket on January 04, 2019, 05:36:50 pm

Quote from: nes999 on January 04, 2019, 05:25:38 pm

I recently purchased a used 12v 69 amp server power supply. It came without a cord. It seems like all the power cords I'm finding are 16 and 14 AWG. Is that really what they need?



Sent from my VS988 using Tapatalk

In VERY broad terms and disregarding a number of factors that's 6.9 Amps at 120 volts so the cords you mention should work fine.

Sent from my SM-G900V using Tapatalk

I feel really dumb, my brain was stuck thinking 69 amps at 120v. Which is what had me perplexed.

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Title: Re: Used server power supply
Post by: nes999 on January 04, 2019, 05:55:47 pm

Quote from: Richard Crowley on January 04, 2019, 05:49:55 pm

Please complete your user profile to at least reveal what country you are in.
So that we know what is your mains voltage?

Ohm's Law says....
12V @ 69A = 828W

Of course, no power supply is 100% efficient.
So, lets say 900W power drawn from the mains at peak load

900W @ 120V = 7.5A
900W @ 240V = 3.75A

So, any power cord rated for 15A would do the job nicely for either mains voltage.

Sorry about that! I just updated it.

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