Fuse link AMP rating - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 07-27-2006, 12:47 PM
Member
 
Last photo:
Join Date: Jan 2003
Location: tennessee
Posts: 5,909
Wiki Edits: 0

Thanks: 0
Thanked 7 Times in 7 Posts
Fuse link AMP rating

I am trying to make sense of the wiring on a 1988 Ford diesel F250 that has been cobbled almost beyond repair. Right now I need to replace a 20 ga fuse link with an inline fuse and I would like to know the AMP rating that would be required for this? Is there a downside to using the fuse instead of the fuse link?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-27-2006, 01:32 PM
302 Z28's Avatar  
Last photo:
Join Date: May 2003
Location: North Texas
Posts: 10,837
Wiki Edits: 0

Thanks: 1
Thanked 86 Times in 73 Posts
Here is a good wire amperage online reference. Some like fuse links some don't. A fuse link will take longer to blow and will not blow in an instant like a fuse will if you get an intermittent short.

Vince
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-27-2006, 02:14 PM
Member
 
Last photo:
Join Date: Jan 2003
Location: tennessee
Posts: 5,909
Wiki Edits: 0

Thanks: 0
Thanked 7 Times in 7 Posts
Thank you

No prob, your welcome.

Vince

Last edited by 302/Z28; 07-27-2006 at 02:26 PM.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-27-2006, 04:14 PM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Doc here,

The Downside to using a Maxi~Fuse IS:

It is too easy to just keep popping them in without corrective action UNTIL you DO have a fire..

(My opinion only..basied on non~Electrical guy's that have done this over the years..)

Like The Circuit breaker in your house that keeps tripping..you just reset it and move on until the next time..But hardly Troubleshoot the circuit OR call a proper Electrician.

A wired Fuse Link works by MELTING the link, which requires WORK to replace , as the wires around it must be re~Crimped or soldered, shrink tubing applied and the like..MOST folks will find and fix the problem BEFORE replacing a link so as not to have to replace it again! as, opposed to just popping in a maxi fuse.

BOTH work fine...Provided you do the right thing when it goes out..a link or maxi fuse will not blow "on a Spike" or "Freak".. Something Devastating has happened to the current delivery source (hot side of the battery, Alternator..) that , If not protected by the link, would have Burned your rod to the ground..

To find out the link size, you need to find out the Ampacity of the gauge wire over a given number of feet in length. If your wire supports 60 amp draw maximum, you need to match that number and slightly higher or lower, whatever the next closest link will be..

A Common misconception is : A Fuse or link protects the end user device..not true , It is designed to protect the wire in between the Source current (battery) and the load (Device)..using that theory, a fuse is useless with most modern electronics...an over draw will destroy a computer or CD device in Milliseconds ...Long before an analog fuse would ever open. by the time it did..the damage would be done and the resulting damage would most likely only add to more draw.

NEVER bypass a Fuse link...or run without one where one was supplied..Next time your tempted, Think of this : Would I bypass My fuse box in my house straight to the meter? and sleep well at night, knowing my family was in the house? YOUR house DRAWS less current than your battery is capable of supporting..

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-27-2006, 07:33 PM
Member
 
Last photo:
Join Date: Jan 2003
Location: tennessee
Posts: 5,909
Wiki Edits: 0

Thanks: 0
Thanked 7 Times in 7 Posts
Doc, I found and corrected the problem (the guy had clamped a bracket down on the wire going to the fuel shut off solenoid) before I even started to replace the link. This wire is connected, by a fuse link, to the power supply that is hot with the key on only and there is no other fuse in the circuit. This is a 20 ga fuse link that is burned and is what I would replace it with if it was mine however the fellow that owns the truck wants it replaced with an inline fuse and I was wanting to know what would be the proper amp fuse to replace this 20 ga link with.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-28-2006, 01:28 AM
aka Duke of URL
 
Last wiki edit: Finding vacuum leaks Last photo:
Join Date: Oct 2001
Location: Rockville, MD
Posts: 4,821
Wiki Edits: 1

Thanks: 0
Thanked 0 Times in 0 Posts
Red,

To figure the fuse AMP rating you would need to know the draw of the component/circuit. I would replace the fusible link and send him on his merry way because if something else happens on that circuit and the blade fuse doesn't catch it in time, you will be the no good S.O.B. that messed up my truck

You can get the link either at the dealer or most any parts house. I would cover my butt on this one. If he grounded out this circuit by foolishness, who knows what he will do next...

D3AZ 14526-S
9" L 20 GA. Blue Insul (Eyelets)

D3AZ 14526-M
9" L 20 GA. Blue Insul (Stripped Ends)
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-28-2006, 05:18 PM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Doc here,

What GAUGE wire is the load side of the link? 20 Gauge also?

If 20 Gauge, Maxi Fuse it for 10 amps...(max is 11. 1 amps..)

If the wire is bigger, look up the ampacity of the wire and fuse it accordingly.

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
need help with a 12 v to 6 v reducer oldguy829 Electrical 32 08-21-2006 05:02 PM
fuse size for 8 gauge- main feed powderbill Electrical 12 04-21-2006 07:08 PM
ac to dc amp rating HELP???? Ratchet Electrical 7 01-23-2006 04:53 PM
75 amp Battery fuse Mr.NutCase Electrical 1 12-28-2005 06:49 PM
Wiring harness from scratch, fuse values norcal02 Electrical 3 09-16-2003 11:03 AM


All times are GMT -6. The time now is 05:44 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.