Upfitter AWG
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Upfitter AWG
Hey Folks,
I've got a 2019 F450, and I'm wondering if anyone can shed some light on the size of the blunt cut wires that come out of the upfitter relay box. These wires seem to be significantly undersized for the amp ratings. Looks to be 10-12AWG for the 40A circuits, which is definitely undersized given that most places online recommend 6 or 8AWG minimum for a 12VDC 40A circuit. I suppose you might get away with 10AWG for a very short (<5 ft round trip) circuit, but not anything longer.
I'm installing an air compressor and I was going to wire it to one of my 40A switches. Is it possible (without a huge amount of work) to replace one of the 10AWG blunt cut wires with a 6AWG?
If not, I'm thinking I'll wire one of the 25A switches to a relay and wire that relay directly to the battery with a 6GA wire. Does it matter which battery?
I've got a 2019 F450, and I'm wondering if anyone can shed some light on the size of the blunt cut wires that come out of the upfitter relay box. These wires seem to be significantly undersized for the amp ratings. Looks to be 10-12AWG for the 40A circuits, which is definitely undersized given that most places online recommend 6 or 8AWG minimum for a 12VDC 40A circuit. I suppose you might get away with 10AWG for a very short (<5 ft round trip) circuit, but not anything longer.
I'm installing an air compressor and I was going to wire it to one of my 40A switches. Is it possible (without a huge amount of work) to replace one of the 10AWG blunt cut wires with a 6AWG?
If not, I'm thinking I'll wire one of the 25A switches to a relay and wire that relay directly to the battery with a 6GA wire. Does it matter which battery?
Fleet Mechanic
Joined: May 2011
Posts: 1,866
Likes: 84
From: Rainier OR
They are small compaired to the industry standards. I have seen a chart that showed the smaller wire size as being ok for short distances.
my 2018 has much latger sizes that my 2011 did.
the OEM did rate these as being sufficient for the circuit, i wouldn't worry about it, but i would run the larger wires for anything i added on.
For my compressor system I ran a FUSED wire directly from the battery for the power to the pressure switch/relay, then the low amp upfitter switch for the relay trigger.
my 2018 has much latger sizes that my 2011 did.
the OEM did rate these as being sufficient for the circuit, i wouldn't worry about it, but i would run the larger wires for anything i added on.
For my compressor system I ran a FUSED wire directly from the battery for the power to the pressure switch/relay, then the low amp upfitter switch for the relay trigger.
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Does anybody occur to know what the gauge of wire used for the upper switches is? It's fascinating that there are 2 25 amp circuits as well as 10 and 15 amp circuits with what appears to be 18 gauge stranded wire. I would've unspecified that if they were planning on using stranded wire they would've favored a 14 or at most 16 gauge to make sure minimal current loss and protection.
Thread Starter
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New User
Joined: Mar 2019
Posts: 3
Likes: 0
They are small compaired to the industry standards. I have seen a chart that showed the smaller wire size as being ok for short distances.
my 2018 has much latger sizes that my 2011 did.
the OEM did rate these as being sufficient for the circuit, i wouldn't worry about it, but i would run the larger wires for anything i added on.
For my compressor system I ran a FUSED wire directly from the battery for the power to the pressure switch/relay, then the low amp upfitter switch for the relay trigger.
my 2018 has much latger sizes that my 2011 did.
the OEM did rate these as being sufficient for the circuit, i wouldn't worry about it, but i would run the larger wires for anything i added on.
For my compressor system I ran a FUSED wire directly from the battery for the power to the pressure switch/relay, then the low amp upfitter switch for the relay trigger.
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fatfenders
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