Mack187Murder Posted July 25, 2017 Report Posted July 25, 2017 Got 2 xs power 3300 amp Batts. Big threes done..and I'm.installing a mechman 370. I fuse the power wire from alt to battery with a 400 amp fuse right. Now since my b atteties are in parallel do I fuse the power wire connecting them on each end with a 400 amp fuse as well. .
reedal Posted July 26, 2017 Report Posted July 26, 2017 Just use a 350A fuse. Even if your alt were to put out 370A all of the time, it likely won't blow the 350A fuse due to the design of the fuse. Using a 400A fuse will require to have 450A+ to blow it. yes, you need to have a fuse within two feet of each positive connection of each battery. The closer the fuse is to the battery the better SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32
rocking.that.eclipse Posted July 26, 2017 Report Posted July 26, 2017 Fuse for what your wire is rated for. If your alt puts out more than 370 at any point good as long as your wire can handle that.
06RTCharger Posted July 26, 2017 Report Posted July 26, 2017 Whats 0gauge rated for? Around 300-350 right? If u put a 400fuse on a 300 rated wire, u could go up in smoke lol. That would basicially not even be a fused run. Maybe two ogauge runs positive and Fuse both runs with a 200A fuse. Might work better? Im still a noob tho, just givin u some input and ideas.
ShadeTreeMechanic Posted July 27, 2017 Report Posted July 27, 2017 No need to fuse alt to front battery. If you did, then you would need a fuse at the alt and a fuse at the battery. 91 C350 Centurion conversion ( Four Door One Ton Bronco) 250A Alternator (Second Alternator Coming Soon) G65 AGM Up Front / Two G31 AGM in Back Pioneer 80PRS CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon) Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon)
WalledSonic Posted July 27, 2017 Report Posted July 27, 2017 13 minutes ago, ShadeTreeMechanic said: No need to fuse alt to front battery. If you did, then you would need a fuse at the alt and a fuse at the battery. Most cars have an alternator fuse, and if you bypass it, you should probably replace it, no? Chevy Sonic Wall (4) 15's on 10k Build Log https://www.stevemeadedesigns.com/board/topic/209412-2015-chevy-sonicwall4-15s10klithiumlarge-case-hairpin-us-alts/ (4) Fi SP4 15's | (2) Ampere 5Ks | Active! | Arc KS600.2 & KS125.2mini | CDT Silk Domes | Silver Flute 8s | 240Ah JY | US Alts Jeep Wrangler JK (4) 8's in a 4th Order Build Log https://www.stevemeadedesigns.com/board/topic/209841-shadow-2016-jeep-wrangler-jk4th-order4-8sdc-35klarge-case-hairpin-us-alts/ IG @walledsonic
ShadeTreeMechanic Posted July 27, 2017 Report Posted July 27, 2017 The thing about an alternator fuse is that in order to get full output without blowing the fuse then the fuse needs to be rated higher than output. If fuse is higher than output and there is a short, it won't blow the fuse. 91 C350 Centurion conversion ( Four Door One Ton Bronco) 250A Alternator (Second Alternator Coming Soon) G65 AGM Up Front / Two G31 AGM in Back Pioneer 80PRS CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon) Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon)
reedal Posted July 27, 2017 Report Posted July 27, 2017 Few people ever get full output from the alt.... a 350A fuse for a 370A will be more than ok even if he does have full output the entire time SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32
ShadeTreeMechanic Posted July 28, 2017 Report Posted July 28, 2017 If he has full output and it doesn't blow the 350A fuse then how will it blow the fuse if there is a short? 91 C350 Centurion conversion ( Four Door One Ton Bronco) 250A Alternator (Second Alternator Coming Soon) G65 AGM Up Front / Two G31 AGM in Back Pioneer 80PRS CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon) Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon)
reedal Posted July 28, 2017 Report Posted July 28, 2017 A short will cause a much larger surge from the battery than the 20A difference between the fuse and Alts max output. The 20A isn't going to hurt that fuse, nor will it ever happen. SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32
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