I'm installing my system right now (first timer), and am running a single 4awg wire from the battery to the trunk to a dist block splitting it into two 8awg wires to go to each amp. My question is what size fuse do i put in the inline fuse holder near the battery? The amps are Phenoix Gold X100.4 and a Pheonix Gold X600.1.....
TIA
See more
HERE
I'd fuse the inline for the wire and the distro for the amp (if it's a fused distro block) - as in, the inline for 4ga would be 125 amps and then the fuses on the distro block (if there are any) would match what the amp would need.
Some people like to do it this way and some people just like to fuse for the wire size so all of their 8ga would be fused at 50 amps regardless of what the amp pulled from it.
-Seth
so since i'll have two 8awg wires coming out the distribtuion block (it's not a fused distribution block), I'll still use a single 50 amp fuse in the inline fuse holder?
Nope, you have to fuse the 4ga which would be 125 amps. Ideally you would have a fused distro block and those would each be fused at 50 for the 8ga. The way you have it now, the 8ga will even be able to pull like 100 amps which will prolly fry it. If I were you, I would return/sell/whatever the distro block you have and get a fused one that way you can fuse each 8ga wire too.
-Seth
sorry for OT, but if i were running a 2nd battery in the trunk, and using 4 gauge wire, would i need a 125 amp fues at both ends of the connecting wire? or less apms??
Joey Baggs (Eazy716) wrote:sorry for OT, but if i were running a 2nd battery in the trunk, and using 4 gauge wire, would i need a 125 amp fues at both ends of the connecting wire? or less apms??
Yea, you need a 125a fuse at the positive of each battery.
wysiwyg wrote:i would say they bang, they don't really pound so much. but if
you want to bump, then they will bump and hit real hard and a lot good. 
LOL
wizkiddrummer wrote:
See more HERE
I'd fuse the inline for the wire and the distro for the amp (if it's a fused distro block) - as in, the inline for 4ga would be 125 amps and then the fuses on the distro block (if there are any) would match what the amp would need.
Some people like to do it this way and some people just like to fuse for the wire size so all of their 8ga would be fused at 50 amps regardless of what the amp pulled from it.
-Seth
not try to start with ya hate when people do any ways my national electrical code book state 90degree c or 194 degrees f is what i am taking this from 8 ga has an amp rating of 55 and 6ga =75 and 4ga = 95 and 3ga = 110 and 2ga = 130
now on another page it say for single insulated conductors in free air amp ratings are as follows 8ga=80 and 6 ga=105 and 4 ga =140and 3 ga =165 and 2 ga 190 amps i would not use this table because it is not in free air in your car when you pass it through the fire wall it with another conductor since the chassis is a ground .
the top one is for more then one conductor at 100 foot or less .
plus not saying you have to use the max fuse lets say in 4 ga let say it 90 amp and you put a 40 amp fuse in it it will be fine i know this
oh ya book isbn is 0-87765-432-8
but why are these so off ?
the easiest way is to add the total of the fuses on your amps and then wallah you have your amp size.. guessing by the sizes of your amps i would say 50 would be fine but you could go higher..
One of my amps has a recommended fuse size of 60A and the other has a recommended fuse size of 80A...so I should use those size fuses in a fused dist. block and a 125A fuse in the inline fuse holder near the battery (to protect the wire)...correct?
that looks to be correct 125 for the inline fuse and 80 and 60 for the amps funny thing you guys talking about fuses i had a 40 amp fuse in my truck fuse holder(main line ) for 8 ga wire for the longest of time never blew and i got tit going to two amps one has 60 amps in fuses the other 30 amps in fuses had it in there for over a year till i just blew it moving the box around and the pos side touched ground you could save your self some dough and get a smaller fuse like a 80 or 90 if they have it cheaper because some times bigger fuses cost more. any ways what i put up already is is the code here in ohio your not even aloud to touch some one else's car unless you are licensed as a electrician so in other words schools like snake pit etc.. are just a go no were school but if you go to a community college or trade school then get licensed you can. talk about some B.S. by the way that chart i posted was for the state so not to burn up wires it is different state to state. any ways it looks good you could go smaller fuses just to save some dough though but to small and you waste fuses
joe momma wrote:not try to start with ya hate when people do any ways my national electrical code book state 90degree c or 194 degrees f is what i am taking this from 8 ga has an amp rating of 55 and 6ga =75 and 4ga = 95 and 3ga = 110 and 2ga = 130
now on another page it say for single insulated conductors in free air amp ratings are as follows 8ga=80 and 6 ga=105 and 4 ga =140and 3 ga =165 and 2 ga 190 amps i would not use this table because it is not in free air in your car when you pass it through the fire wall it with another conductor since the chassis is a ground .
the top one is for more then one conductor at 100 foot or less .
plus not saying you have to use the max fuse lets say in 4 ga let say it 90 amp and you put a 40 amp fuse in it it will be fine i know this
oh ya book isbn is 0-87765-432-8
but why are these so off ?
I'm not sure to put it simply, lol.
Ryan Granholm wrote:One of my amps has a recommended fuse size of 60A and the other has a recommended fuse size of 80A...so I should use those size fuses in a fused dist. block and a 125A fuse in the inline fuse holder near the battery (to protect the wire)...correct?
Sounds right.
-Seth
wizkiddrummer wrote:joe momma wrote:not try to start with ya hate when people do any ways my national electrical code book state 90degree c or 194 degrees f is what i am taking this from 8 ga has an amp rating of 55 and 6ga =75 and 4ga = 95 and 3ga = 110 and 2ga = 130
now on another page it say for single insulated conductors in free air amp ratings are as follows 8ga=80 and 6 ga=105 and 4 ga =140and 3 ga =165 and 2 ga 190 amps i would not use this table because it is not in free air in your car when you pass it through the fire wall it with another conductor since the chassis is a ground .
the top one is for more then one conductor at 100 foot or less .
plus not saying you have to use the max fuse lets say in 4 ga let say it 90 amp and you put a 40 amp fuse in it it will be fine i know this
oh ya book isbn is 0-87765-432-8
but why are these so off ?
I'm not sure to put it simply, lol.
Ryan Granholm wrote:One of my amps has a recommended fuse size of 60A and the other has a recommended fuse size of 80A...so I should use those size fuses in a fused dist. block and a 125A fuse in the inline fuse holder near the battery (to protect the wire)...correct?
Sounds right.
-Seth
i thing the difference in fuse sizes goes by state and county laws this is were one of mine states for 4 ga you can use 140 amps and the other says 90 amps . plus were i live you have to be a electrician to attach any thing to a battery of some one else's (in a car ) because of fire potential so in other words unless i move a place like the snake pit or installer institute etc..could be useful but now are just wort less to go to unless you need to know box building
