• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

200amp install, why put a fuse in the 4g wire?

  • Thread starter Thread starter eeh1025
  • Start date Start date May 21, 2005
E

eeh1025

New Member
Nov 22, 2004
49
0
0
May 21, 2005
#1
  • May 21, 2005
  • #1
Hey there I recently installed a 200 amp altanator and i heard to put a fuse in the 4gauge wire, is this nessary. and why is it needed?
thanks
 

Stang8URMPRT

Active Member
Dec 28, 2003
1,100
1
38
Daytona Beach, FL
May 21, 2005
#2
  • May 21, 2005
  • #2
If that wire shorts... and no fuse... = car up in flames.
 

BlackFox5.0

Founding Member
Aug 7, 2000
3,514
1
0
Massachusetts
May 21, 2005
#3
  • May 21, 2005
  • #3
I think that is regulated voltage coming from the alt. If for some reason the internal regulator stops doing it's job, it could very quickly overheat that wire, and cause a fire. Why wouldn't you fuse it?
 
E

eeh1025

New Member
Nov 22, 2004
49
0
0
May 21, 2005
#4
  • May 21, 2005
  • #4
i cant get a fuse and fuse holder anywhere buy me they dont have them that big and i dont have a credit card to order one.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
34
129
May 21, 2005
#5
  • May 21, 2005
  • #5
you should do it. as others said, should the wire short out or the alt have an internal short, the wire will catch on fire.

stereo shops have fuses and holders. if not, a family member should have a CC that you can use. you should fuse that wire.

good luck.
 

Stang8URMPRT

Active Member
Dec 28, 2003
1,100
1
38
Daytona Beach, FL
May 21, 2005
#6
  • May 21, 2005
  • #6
Here's the holder, and a list of fuses below. I'd go with a 250 amp.

http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7&Partnumber=263-630
 

jrichker

StangNet's favorite TOOL
In Remembrance. Thank you for your contributions
Mar 10, 2000
27,512
2,813
234
Dublin GA
May 21, 2005
#7
  • May 21, 2005
  • #7
For a 200 amp alt, I would use 2 gauge wire with a 200 amp fuse.
 

Stang8URMPRT

Active Member
Dec 28, 2003
1,100
1
38
Daytona Beach, FL
May 21, 2005
#8
  • May 21, 2005
  • #8
Don't listen to him.. He don't know anything........................... Just kidding.
 

BelueLX

Founding Member
Jul 10, 1999
1,195
1
0
May 21, 2005
#9
  • May 21, 2005
  • #9
jrichker said:
For a 200 amp alt, I would use 2 gauge wire with a 200 amp fuse.
Click to expand...

I agree with this guy. Safety first. Electrical fires are nasty.
 
D

Daggar

New Member
Jul 19, 2004
3,902
5
0
May 21, 2005
#10
  • May 21, 2005
  • #10
Ahhhhh... once again... My work here is done.
 
You must log in or register to reply here.

Similar threads

B
Electrical Fuse 8, Light Green / Black Wire
  • bleedinggreen
  • Jun 23, 2025
  • Fox 5.0 Mustang Tech
Replies
7
Views
457
Fox 5.0 Mustang Tech Jun 26, 2025
bleedinggreen
B
2
SJB Parasitic Draw, Fuse 59&67
  • 2005 Mustang V6
  • Apr 30, 2026
  • 2005 - 2014 S-197 Mustang -General/Talk-
Replies
0
Views
102
2005 - 2014 S-197 Mustang -General/Talk- Apr 30, 2026
2005 Mustang V6
2
B
Electrical Why does my fox body keep frying eecs
  • brandyn200
  • Jun 20, 2026
  • Fox 5.0 Mustang Tech
Replies
8
Views
259
Fox 5.0 Mustang Tech Jun 25, 2026
AeroCoupe
Electrical Mini-Starter Wiring
  • RekeHavoc
  • Jul 25, 2025
  • Fox 5.0 Mustang Tech
Replies
10
Views
1K
Fox 5.0 Mustang Tech Aug 24, 2025
Mustang5L5
Resolved 93 Mustang 5.0 - Cranks but does not start
  • dan50
  • Jul 18, 2026
  • Fox 5.0 Mustang Tech
Replies
6
Views
133
Fox 5.0 Mustang Tech Jul 18, 2026
dan50
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?