Aux 1 Upfitter OK for 300 Watt Light? - Page 2 - Ford Powerstroke Diesel Forum
6.7 Electronics Discussion (2011-2016) 6.7 Electronics Discussion

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post #11 of 20 Old 08-17-2017, 07:06 PM Thread Starter
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believe me I'm keeping the harness, and the first time this setup takes out a fuse I'll be re-wiring it your way
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post #12 of 20 Old 08-18-2017, 03:09 AM
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If you use the extra harness think about using the #3 or #4 up-fitter. That way you have the 25A to use for something else in the future.
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post #13 of 20 Old 08-18-2017, 04:02 PM Thread Starter
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Good idea HA - the lower amp switches would be just fine if only used to activate the harness relay
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post #14 of 20 Old 09-03-2017, 08:23 AM
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I don't know about what you guys think but the output wires for AUX 1 and 2 seem really small for 25 amps.... I'm contemplating running a dedicated circuit for my compressor and using the lower amp aux switches for a relay because of the wire size directly out of the relay. Cant fathom running a 10ft lead @ 21 amp draw out of these tiny 25 amp factory ford leads for AUX 1 and 2 with the same size wire they have out. Any opinions?
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post #15 of 20 Old 09-03-2017, 08:40 AM
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I use relays on most any switch / upfitter

there cheap and easy to replace I would rather wear those contacts and amp load the wire size i choose to run from the battery/ relay / equipment

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post #16 of 20 Old 09-03-2017, 09:25 AM
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I hear ya. It would be nice to able to sufficiently run directly off the factory wires especially when they have a switch and relay integrated into the circuit already (one would think thats what they are intended for)... the wire size they chose for the 25 amp circuits is very disappointing... You would think they would give you a lead that was big enough to safely handle 25 amps @ 3% voltage drop at least the length of the truck.... Im just going to run my own power source with a marine grade fuse block and cable and switch the source with aux 4. little more work and money but well worth the time to prevent failure.
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post #17 of 20 Old 09-03-2017, 10:36 AM
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even a weather proof like this is fine IMO


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post #18 of 20 Old 09-03-2017, 01:59 PM
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So what gauge wire is rated to run 25A at 25'+/- ??



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post #19 of 20 Old 09-03-2017, 04:24 PM
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This chart works very well as a reference. I used it a lot when wiring my boat and when making a run. To answer your question- 25 amp draw at 25' run with 3% voltage drop you would want to run 6 AWG wire.
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post #20 of 20 Old 09-04-2017, 03:53 AM
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Since most of the thread is done, just wanted to add this for simple calculation of Watts/Amps...

Watts to amps (A) conversion calculator

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