KC Hilites Fog Lights 16 gauge wire 10amp fuse - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 03-15-2015, 01:50 AM
Thread Starter
  #1
Jeeper
 
Join Date: Dec 2014
Posts: 207
KC Hilites Fog Lights 16 gauge wire 10amp fuse

I have KC hilites fog lights (2) and I have them connected using 16 gauge wire and 10amps fuse.

I had 7.5 amps fuse and it blew up after a little (2 minutes after I turned it on).

is the 10 amps fuse good for 16 gauge wire?

NJWrang is offline   Quote
Old 03-15-2015, 03:21 AM   #2
Jeeper
 
InvertChaos's Avatar
 
Join Date: Sep 2010
Location: Denver, CO
Posts: 8,239
Well using the P=IV formula you have I = 200W/12V = 16.6 Amps. I bet it'll pop the 10 amp fuse too. I think my KC day lighters have a 20A fuse, but I'm not sure. According to this, 20A is a good rule of thumb for 16gauge wire http://www.rowand.net/shop/tech/wirecapacitychart.htm I'd still be cautious with that thin of wire. Is there a reason you ran 16 gauge instead of 14 or 12?

InvertChaos is offline   Quote
Old 03-15-2015, 03:24 AM   #3
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 48,451
True fog lights are usually 55 watts each so they total 110 watts which draws around 9 amps... but they draw more than that when they're cold when you first throw the switch so I'd go for a 15 amp fuse. I'd also up the wire gauge from 16 to 14 gauge to be safe... 16 is barely adequate for those amps.

If they're 100 watts as some fog lights are, the above numbers are correct but they should be controlled by a relay. You can buy prewired driving light wiring harnesses that include a relay and switch inexpensively from nearly any 4x4 shop.
__________________
When you have a choice, buy American.
Jerry Bransford is offline   Quote
Sponsored Links
Advertisement
 
Old 03-15-2015, 10:47 AM   #4
Jeeper
 
SparkieWWJKU/TJ's Avatar
 
Join Date: Oct 2014
Location: Not the end of the world but you can see it from here.
Posts: 1,730
Quote:
Originally Posted by InvertChaos View Post
Well using the P=IV formula you have I = 200W/12V = 16.6 Amps. I bet it'll pop the 10 amp fuse too. I think my KC day lighters have a 20A fuse, but I'm not sure. According to this, 20A is a good rule of thumb for 16gauge wire Wire Capacity Chart I'd still be cautious with that thin of wire. Is there a reason you ran 16 gauge instead of 14 or 12?

Do not use that chart on this link for wire capacities. It is misinformation and you will melt your wiring/start a fire.

A good rule is as follows:

#10AWG = 30amps
#12AWG = 20amps
#14AWG = 15 amps
__________________
2015 Willys JKU 6 spd - Grill Guard, Back-up Camera, Rancho 2" Sport Lift with RS9000XL's, Ace Rock Sliders, 1.5" G2 Wheel Spacers, Chinese LED Healights and Fogs, Kicker Speaker upgrade (all 8)
2005 Wrangler TJ 4.0 6spd (Daily Driver)
SparkieWWJKU/TJ is offline   Quote
Old 03-15-2015, 11:16 AM   #5
Jeeper
 
InvertChaos's Avatar
 
Join Date: Sep 2010
Location: Denver, CO
Posts: 8,239
Quote:
Originally Posted by SparkieWWJKU/TJ View Post

Do not use that chart on this link for wire capacities. It is misinformation and you will melt your wiring/start a fire.

A good rule is as follows:

#10AWG = 30amps
#12AWG = 20amps
#14AWG = 15 amps
Good call. Wasn't sure where to find reliable numbers for braided wire capacities which raises the question, why isn't OP using #10-12 wire? I tend to go over kill on my projects, but that's just me.
InvertChaos is offline   Quote
Old 03-15-2015, 11:23 AM   #6
Jeeper
 
CtacTj's Avatar
 
Join Date: Aug 2014
Location: Western NC
Posts: 151
Quote:
Originally Posted by SparkieWWJKU/TJ View Post
Do not use that chart on this link for wire capacities. It is misinformation and you will melt your wiring/start a fire.

A good rule is as follows:

#10AWG = 30amps
#12AWG = 20amps
#14AWG = 15 amps
It's the same for house wiring. Amps are amps. Regards.
__________________
Yesterday I hit rock bottom,Then I engaged the Lockers.
CtacTj is offline   Quote
Old 03-15-2015, 12:24 PM   #7
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 48,451
If they are 100 watt lights, he won't have to worry about any of this by simply buying and installing a pre-wired driving light wiring harness. That makes it easy and provides the right gauge wiring, fuse, switch, and relay... ready to connect, they're made to be installable without any electrical knowledge needed.
__________________
When you have a choice, buy American.
Jerry Bransford is offline   Quote
Old 03-15-2015, 12:36 PM   #8
Jeeper
 
SparkieWWJKU/TJ's Avatar
 
Join Date: Oct 2014
Location: Not the end of the world but you can see it from here.
Posts: 1,730
Quote:
Originally Posted by CtacTj View Post
It's the same for house wiring. Amps are amps. Regards.
Exactly !!


Quote:
Originally Posted by Jerry Bransford View Post
If they are 100 watt lights, he won't have to worry about any of this by simply buying and installing a pre-wired driving light wiring harness. That makes it easy and provides the right gauge wiring, fuse, switch, and relay... ready to connect, they're made to be installable without any electrical knowledge needed.
Still have to be careful and do simple OHMS LAW calculations. Even some of the pre wired relay harnesses coming out of China are over-fused.
__________________
2015 Willys JKU 6 spd - Grill Guard, Back-up Camera, Rancho 2" Sport Lift with RS9000XL's, Ace Rock Sliders, 1.5" G2 Wheel Spacers, Chinese LED Healights and Fogs, Kicker Speaker upgrade (all 8)
2005 Wrangler TJ 4.0 6spd (Daily Driver)
SparkieWWJKU/TJ is offline   Quote
Old 03-15-2015, 02:39 PM   #9
Mostly old school..!

5-Year WF Supporting Member
 
Water Dog's Avatar
 
Join Date: Mar 2011
Location: Now searching for rocks in Sumner, TX
Posts: 12,149
Quote:
Originally Posted by CtacTj View Post
It's the same for house wiring. Amps are amps. Regards.
Not exactly. Slightly smaller gauges are permissible in 12 volt DC automotive wiring due to the fact that the length of the run makes a significant difference. If in doubt, it is always better to err on the conservative side of course.
__________________
Dennis
Water Dog is offline   Quote
Old 03-15-2015, 04:33 PM   #10
Jeeper
 
InvertChaos's Avatar
 
Join Date: Sep 2010
Location: Denver, CO
Posts: 8,239
Quote:
Originally Posted by Water Dog View Post

Not exactly. Slightly smaller gauges are permissible in 12 volt DC automotive wiring due to the fact that the length of the run makes a significant difference. If in doubt, it is always better to err on the conservative side of course.
Not to mention solid core vs braided
InvertChaos is offline   Quote
Old 03-15-2015, 06:23 PM   #11
Jeeper
 
Blackhawk36's Avatar
 
Join Date: Jan 2014
Location: Ellicott City, MD
Posts: 672
Since electron run along the surface of the conductor instead of through it, the stranded wire can carry more amps than solid core wire but in automotive applications, it is not significant enough to differentiate between gauges.

Amps are amps but that doesn't mean wire gauge requirements for 12VDC are the same as 110VAC. See the chart. Your 16 gauge wire is fine to be fused at 20 amps. Plenty for your lights.
Attached Thumbnails
Click image for larger version

Name:	WireGauge.jpg
Views:	71
Size:	93.1 KB
ID:	1995609  
Blackhawk36 is offline   Quote
Old 03-15-2015, 06:37 PM   #12
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 48,451
Quote:
Originally Posted by Blackhawk36 View Post
Since electron run along the surface of the conductor instead of through it,.
You're referring to the skin effect or surface effect which is not in effect with DC power as the OP's lights use. The skin effect is only something that happens with RF (AC), not DC at all, with the higher the frequency the greater the skin effect. Skin effect - Wikipedia, the free encyclopedia

This discussion is getting way too deep for the OP's question.
__________________
When you have a choice, buy American.
Jerry Bransford is offline   Quote
Old 03-15-2015, 10:25 PM
Thread Starter
  #13
Jeeper
 
Join Date: Dec 2014
Posts: 207
I used 16 guage wire because thats all I had at the time and I just wanted to mount them.

I now have the 10 amps fuse and it didn't blow. Should I just keep this setup? I left them on for a while (5 minutes) and felt the wire and it wasn't hot.
NJWrang is offline   Quote
Old 03-15-2015, 10:55 PM   #14
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 48,451
We can't offer definitive advice until you answer the above posted question of the wattage of the individual fog lights. 55 watts? 100 watts? LED?
__________________
When you have a choice, buy American.
Jerry Bransford is offline   Quote
Old 03-15-2015, 11:14 PM
Thread Starter
  #15
Jeeper
 
Join Date: Dec 2014
Posts: 207
Quote:
Originally Posted by Jerry Bransford View Post
We can't offer definitive advice until you answer the above posted question of the wattage of the individual fog lights. 55 watts? 100 watts? LED?
ill confirm in the morning. they are not LED for sure.
NJWrang is offline   Quote
Old 02-27-2017, 12:39 PM   #16
Newb
 
Join Date: Feb 2017
Posts: 1
Pretty sure morning has come and gone...

DatGuyIzU is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off






All times are GMT -5. The time now is 12:18 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Jeepģ, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.