Date:         Wed, 24 Oct 2012 19:12:37 -0700
Reply-To:     neil n <musomuso@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         neil n <musomuso@GMAIL.COM>
Subject:      Re: Headlight Upgrade Double Check (fuses)
Comments: To: David Beierl <dbeierl@attglobal.net>
In-Reply-To:  <50887d06.65553a0a.2970.3f6b@mx.google.com>
Content-Type: text/plain; charset=ISO-8859-1

< Ed McMahon >

"I did not know that!"

Or at least I hadn't thought of things that way. Makes sense.

I know there's ampacity charts online.

Neil.

On Wed, Oct 24, 2012 at 4:42 PM, David Beierl <dbeierl@attglobal.net> wrote:
> At 06:33 PM 10/24/2012, neil n wrote:
>>
>> I'm installing H4 round headlights with 80/100 Watt bulbs. ('88 Westy)
>> I saw Alistair's diagrams (thank you Alistair!).
>>
>> Using P = IE at ~ 13 Volts 100 Watts is 7.7 Amps
>>
>> Stock fuses are 10 Amps each.
>
>
> Ur doing it rong. ;-)
>
> Size your fuses according to the ampacity of the wires in the circuit, not
> the amount of current drawn by the load.  Otherwise you will lose more power
> than necessary in the fuse and have more chance of a false blow.
>
> The fuses are to protect the wiring, *not* the load.
>
> Yours,
> David



--
Neil n

65 kb image Myford Ready For Assembly  http://tinyurl.com/64sx4rp

'88 Slate Blue Westy to be named.

'81 VanaJetta 2.0 "Jaco"  http://tubaneil.googlepages.com/

Vanagon VAG Gas I4/VR Swap Google Group:

http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines