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#26 |
Registered User
Join Date: Mar 2018
Location: Ardmore
Posts: 100
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Re: Does everything run off of one 12ga wire?
How many of those 80 year cars burned to the ground due to that same wiring, or more to the point i made about voltage drop, how many would the headlights dim drastically because you turned the blower motor on high?
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#27 | |
Senior Member
![]() Join Date: Jul 2000
Location: North Texas
Posts: 3,488
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Re: Does everything run off of one 12ga wire?
Quote:
I actually think this is a worthwhile and informative thread. The info posted by by RichardJ and HO455 is something all of us can use. Especially guys who don't know a lot about the relationship between DC voltage, current, resistance, and power.
__________________
Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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#28 |
Senior Member
![]() Join Date: Oct 2020
Location: Kathleen, GA
Posts: 636
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Re: Does everything run off of one 12ga wire?
There are plenty of vehicles (new and old) burning to the ground each year due to faulty wiring, or wiring that was tampered with by home hobbyists. I think this thread is very to the point and provides a lot of data that will help many of us who have not benefited from the electronics learned in the military. I used to wire the weapons system on the A-10 many moons ago (28v and 115v) I use the same principles when doing any wiring on the truck. I am a big advocate of running a new fuse block for any modern electronics or anything that was not original equipment. I did this for my 72 MGB and will also do this on my classic Mini. Trust me, when dealing with British wiring, you take all the precautions you can. Do this with any vintage vehicle and your electrical system will last a long time.
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#29 | |
Senior Member
![]() Join Date: Dec 2009
Location: TN.
Posts: 8,091
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Re: Does everything run off of one 12ga wire?
Quote:
Some people need to look back at their own post history. Then They will Maybe Open their Eyes to who it is that is Devolving. I think this is a Very informative thread. That is what forum are all about to discuss different opinions about a certain topic.
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#30 |
Post Whore
![]() Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,111
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Re: Does everything run off of one 12ga wire?
I just hope we helped the OP answer the questions posed. We did drift somewhat off course but the deviation has made the thread interesting.
" I did this for my 72 MGB and will also do this on my classic Mini. Trust me, when dealing with British wiring, you take all the precautions you can. Do this with any vintage vehicle and your electrical system will last a long time." And good luck to 68 C10 Driver keeping that Lucas smoke corralled. ![]()
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. ![]() RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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#31 | |
Senior Member
![]() Join Date: Jul 2000
Location: North Texas
Posts: 3,488
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Re: Does everything run off of one 12ga wire?
Quote:
Also, I'd be less concerned about 12 gauge wire, and more concerned about poor connections and wire that's had the insulation rubbed off, etc. I found a couple spots under the wrap on my OE harness that were problems waiting to happen. As for the 12 ga wire, if the truck still has the proper 16 gauge fusible link, that sucker will blow to protect the wire if necessary.
__________________
Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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#32 | |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,388
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Re: Does everything run off of one 12ga wire?
Quote:
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#33 |
Senior Member
![]() Join Date: Dec 1999
Location: Southern California
Posts: 2,804
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Re: Does everything run off of one 12ga wire?
Not an engineer myself but have worked on and installed many AC and DC circuits in my lifetime in commercial, residential and auto. From what I understand the "skin effect" is negligible in common applications and only applicable with AC current and is really only applicable in high frequency AC applications, above what common circuits use. Difference is not shown in charts for that reason. As a layperson, I would assume that the automotive charts are regarding auto rated wire. I referenced previously the jacket on wire is important to the amp rating. Wire used in Chinese harnesses and wire at the local parts store may not be the same as some US manufacturers. Look for amp rating on wire. I said NEC is safe for wire gage. If a few dollars want to be saved on using smaller wire as manufacturers do you need to be sure.
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 |
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#34 |
Senior Member
![]() Join Date: Jul 2000
Location: North Texas
Posts: 3,488
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Re: Does everything run off of one 12ga wire?
I was just reading (not necessarily understanding) an article on Wikipedia. The author said that at 60Hz a copper conductor has 23% more resistance than it does at DC. That was for a wire greater than 1" in diameter, so I don't know if that 23% is true for the much smaller gauges we work with.
__________________
Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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#35 |
Registered User
Join Date: Mar 2018
Location: Ardmore
Posts: 100
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Re: Does everything run off of one 12ga wire?
Due to the way skin effect works, unless your conductor is greater than ~17mm in diameter you don't need to worry about it at all for 60HZ AC. Skin effect does increase rapidly with frequency though
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#36 |
Registered User
Join Date: Jun 2021
Location: Buckeye, AZ
Posts: 87
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Re: Does everything run off of one 12ga wire?
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#37 |
Senior Member
![]() Join Date: Nov 2013
Location: East Tennessee
Posts: 2,142
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Re: Does everything run off of one 12ga wire?
Even as an old man, I continue to try and learn something new every day...this thread has learnt me sumpin for the last cupla days...
![]() in particular...wire sizes vs load....the smaller gauge is much easier to manipulate... I would like to see it stay alive for awhile....I might have some ??s I'm knee deep in the re-wiring of my "67 resto.... everything in the electrical system will be brand new and modernized. I've fabricated a bracket for a centralized load center...probably have it powder coated....
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1967 C10 Step side 1968 C10 Step side 1970 Chevrolet K/5 Blazer 1972 Chevrolet K/5 Blazer ............. ![]() Last edited by A1971Blazer; 04-25-2023 at 06:57 PM. |
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#38 | |
Senior Member
![]() Join Date: Dec 2009
Location: TN.
Posts: 8,091
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Re: Does everything run off of one 12ga wire?
Quote:
![]() Is that Tennessee orange?? ![]()
__________________
________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#39 | |
Registered User
Join Date: Sep 2016
Location: Ft Smith, AR
Posts: 565
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Re: Does everything run off of one 12ga wire?
Quote:
I have never seen a radiator with a trans cooler on the drivers side....or is that something else? PS cooler? |
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#40 | |
Senior Member
![]() Join Date: Nov 2013
Location: East Tennessee
Posts: 2,142
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Re: Does everything run off of one 12ga wire?
Quote:
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1967 C10 Step side 1968 C10 Step side 1970 Chevrolet K/5 Blazer 1972 Chevrolet K/5 Blazer ............. ![]() Last edited by A1971Blazer; 04-26-2023 at 11:32 AM. |
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#41 |
Senior Member
![]() Join Date: Nov 2013
Location: East Tennessee
Posts: 2,142
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Re: Does everything run off of one 12ga wire?
Thanks!
Is there any other shade of Orange?.... ![]()
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1967 C10 Step side 1968 C10 Step side 1970 Chevrolet K/5 Blazer 1972 Chevrolet K/5 Blazer ............. ![]() |
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#42 | |
Post Whore
![]() Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,111
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![]() Quote:
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__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. ![]() RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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#43 |
Senior Member
![]() Join Date: Dec 2009
Location: TN.
Posts: 8,091
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Re: Does everything run off of one 12ga wire?
Is Chevy Orange and Tn Orange the same color?
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__________________
________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#44 | |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,247
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Re: Does everything run off of one 12ga wire?
Can I ask where you found that nice 'centralized load center'?
Quote:
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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#45 | |
Senior Member
![]() Join Date: Nov 2013
Location: East Tennessee
Posts: 2,142
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Re: Does everything run off of one 12ga wire?
Quote:
this evening I did the final HOT test on all the circuits…all passed no sparks or smoke ![]() I also integrated the headlight upgrade in it next is wiring in the body harness PCM and engine wiring I’m OCD on wiring but I like it to look neat… sorry for the sideways pictures …did this on my “smart” phone
__________________
1967 C10 Step side 1968 C10 Step side 1970 Chevrolet K/5 Blazer 1972 Chevrolet K/5 Blazer ............. ![]() |
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#46 |
Senior Member
![]() Join Date: Dec 2009
Location: TN.
Posts: 8,091
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Re: Does everything run off of one 12ga wire?
I am Watching.
Flip for ya.
__________________
________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#47 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,388
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Re: Does everything run off of one 12ga wire?
I like these rewiring kits. If I could be assured that I got what the truck actually needed, I'd like to do it. But I'm an old man, and not sure that I could get it done properly or in some kind of reasonable time frame. Meanwhile, I'm expecting electrical problems from the old wiring, just because it's old.
__________________
~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#48 | |
Senior Member
![]() Join Date: Nov 2013
Location: East Tennessee
Posts: 2,142
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Re: Does everything run off of one 12ga wire?
Quote:
I just don't trust many people when it comes to repairs....plus the high cost.. I would be remiss not to mention the wealth of information that is an integral part of this forum as well. A full re-wire is a daunting task but with the basic knowledge of DC circuits, determination, and some time..it can, and will be worth the effort. The wiring on these old trucks, even in good condition is adequate but mediocre at best… add in modern accessories and perhaps an engine swap and they are sorely inadequate… not to mention how many have been hacked to pieces by a long list of previous owners. Nothing I hate more than troubleshooting someone else’s wiring or wiring that looks like a bowl of spaghetti tossed under the hood….
__________________
1967 C10 Step side 1968 C10 Step side 1970 Chevrolet K/5 Blazer 1972 Chevrolet K/5 Blazer ............. ![]() Last edited by A1971Blazer; 05-02-2023 at 07:01 AM. |
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#49 | |
Senior Member
![]() Join Date: Nov 2013
Location: East Tennessee
Posts: 2,142
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Re: Does everything run off of one 12ga wire?
Quote:
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1967 C10 Step side 1968 C10 Step side 1970 Chevrolet K/5 Blazer 1972 Chevrolet K/5 Blazer ............. ![]() |
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#50 | |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,247
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Re: Does everything run off of one 12ga wire?
Thank you for the reply, I appreciate it. I'll take a look on Amazon.
Quote:
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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