Amperage Question

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Oct 17, 2009 | 10:23 AM

yra

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From: Aurora

Amperage Question

Pop quiz, for 2-55 watt fogs, what amperage fuses are to be used at the battery and at the fuse box?

thanks

Oct 17, 2009 | 01:00 PM

Yoda

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From: New France

Quote:

Originally Posted by yra

Pop quiz, for 2-55 watt fogs, what amperage fuses are to be used at the battery and at the fuse box?

thanks

20 amps is perfect

Oct 17, 2009 | 06:42 PM

Octo

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From: Ottawa, Ontario

Power is voltage times current
current is power divided by voltage

2*55/12=
110/12=
9.16

so a 10 amp fuse would be border line, go with 15 amps or 20 amps

Oct 17, 2009 | 07:17 PM

renegadelt1

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From: Daytona, FL.

X2 on the 20 amp that's what comes standard with most kits using 2X 55 watt lamps

Oct 17, 2009 | 08:16 PM

Yoda

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Joined: Dec 2008

Posts: 2,540

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From: New France

Quote:

Originally Posted by Octo

Power is voltage times current
current is power divided by voltage

2*55/12=
110/12=
9.16

so a 10 amp fuse would be border line, go with 15 amps or 20 amps

2*55=110
110/12= 9.16
9.16*1.25 (security factor)= 11.45 amps

Therefore 10 amps is not correct. 15 amps would be okay, but it's a little bit close of 15 (peak voltage)
That's why 20 is perfect.

Last edited by Yoda; Oct 17, 2009 at 08:29 PM.