Wiring dual compressors - The 1947 - Present Chevrolet & GMC Truck Message Board Network

StrokinRat · 08-03-2018, 06:12 AM

Hey guys, I have two Viair 444c compressors. WhatÂ’s the best way to run the main power from battery to the relays? IÂ’ve seen diagrams where it looks like it has one main wire from battery (with 60 amp inline fuse) going to a distribution block then split off that to the relays. I talked to Viair and they said they recommend running two separate wires with 40amp fuses from the battery to the relays. I like the one wire to a fuses distribution block idea for a more clean look. How do yÂ’all have yours ran?

smbrouss70 · 08-03-2018, 08:48 AM

I have an 8 Ga. wire running from the battery through a 70 amp circuit breaker back to a distribution block on the rear-most crossmember. From there to each compressor, i have an inline fuse before the relay and the compressor power positive wire connects directly to the relay.

StrokinRat · 08-03-2018, 09:22 AM

Thanks for the reply. That’s what I’ll probably go with. One thought though. 8gauge seems a little small for a 70amp fuse. Am I wrong in thinking that? Thought I saw where #8 rated for 55amps-#6 rated for 65 amps.

smbrouss70 · 08-03-2018, 09:42 AM

I used Painless wiring P/N 70690. According to their specs that wire is rated to 90 Amps, if you click on the Specs tab. I have checked to see if the wire was getting hot while both Viair 480 compressors were running, and it was as cool as normal. I also have my Accuair e-level ECU powered off of that main run to the back.

http://www.painlessperformance.com/webcat/70690

StrokinRat · 08-03-2018, 09:45 AM

Awesome. Thanks

funkatation · 08-09-2018, 12:26 PM

I think I got the power wiring kit from Accuair. Made it super easy.

https://accuair.com/airmanagementpro...r-supply-kit-2

08-03-2018, 06:12 AM	#1
StrokinRat Registered User Join Date: Jun 2009 Location: Clinton,MS Posts: 234	Wiring dual compressors Hey guys, I have two Viair 444c compressors. WhatÂ’s the best way to run the main power from battery to the relays? IÂ’ve seen diagrams where it looks like it has one main wire from battery (with 60 amp inline fuse) going to a distribution block then split off that to the relays. I talked to Viair and they said they recommend running two separate wires with 40amp fuses from the battery to the relays. I like the one wire to a fuses distribution block idea for a more clean look. How do yÂ’all have yours ran? __________________ 85 Chevy C-10 383 stroker

08-03-2018, 08:48 AM	#2
smbrouss70 Registered User Join Date: Sep 2003 Location: Rayne, LA Posts: 2,781	Re: Wiring dual compressors I have an 8 Ga. wire running from the battery through a 70 amp circuit breaker back to a distribution block on the rear-most crossmember. From there to each compressor, i have an inline fuse before the relay and the compressor power positive wire connects directly to the relay. __________________ Steven "If dogs don't go to heaven, when I die I want to go wherever they went." -- Will Rogers R.I.P. Oscar R.I.P. Ratchet 1967 Pontiac GTO - Dad was the Original Owner 1970 Chevy 2wd SWB "Oscar's Truck" 1970 Chevy 2wd Blazer "Ratchet's Blazer" 2013 Chevy 2500HD Crew Cab Duramax/Allison Z71 LTZ "Brown Sugar" 2017 Chevy Suburban "BDB" 2020 Chevy Blazer Premier "Foxy" Member of Louisiana Classic Truck Club (LCTC) Shop Build

08-03-2018, 09:22 AM	#3
StrokinRat Registered User Join Date: Jun 2009 Location: Clinton,MS Posts: 234	Re: Wiring dual compressors Thanks for the reply. That’s what I’ll probably go with. One thought though. 8gauge seems a little small for a 70amp fuse. Am I wrong in thinking that? Thought I saw where #8 rated for 55amps-#6 rated for 65 amps. __________________ 85 Chevy C-10 383 stroker

08-03-2018, 09:42 AM	#4
smbrouss70 Registered User Join Date: Sep 2003 Location: Rayne, LA Posts: 2,781	Re: Wiring dual compressors I used Painless wiring P/N 70690. According to their specs that wire is rated to 90 Amps, if you click on the Specs tab. I have checked to see if the wire was getting hot while both Viair 480 compressors were running, and it was as cool as normal. I also have my Accuair e-level ECU powered off of that main run to the back. http://www.painlessperformance.com/webcat/70690 __________________ Steven "If dogs don't go to heaven, when I die I want to go wherever they went." -- Will Rogers R.I.P. Oscar R.I.P. Ratchet 1967 Pontiac GTO - Dad was the Original Owner 1970 Chevy 2wd SWB "Oscar's Truck" 1970 Chevy 2wd Blazer "Ratchet's Blazer" 2013 Chevy 2500HD Crew Cab Duramax/Allison Z71 LTZ "Brown Sugar" 2017 Chevy Suburban "BDB" 2020 Chevy Blazer Premier "Foxy" Member of Louisiana Classic Truck Club (LCTC) Shop Build

08-03-2018, 09:45 AM	#5
StrokinRat Registered User Join Date: Jun 2009 Location: Clinton,MS Posts: 234	Re: Wiring dual compressors Awesome. Thanks __________________ 85 Chevy C-10 383 stroker

08-09-2018, 12:26 PM	#6
funkatation Registered User Join Date: Aug 2015 Location: austin, tx Posts: 173	Re: Wiring dual compressors I think I got the power wiring kit from Accuair. Made it super easy. https://accuair.com/airmanagementpro...r-supply-kit-2



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