Go Back   EcoModder Forum > EcoModding > Fossil Fuel Free
Register Now
 Register Now
 


Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 04-16-2013, 08:36 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Apr 2013
Location: East Tenn
Posts: 19
Thanks: 23
Thanked 3 Times in 3 Posts
Welding cable size question

Hello everyone. A friend of mine has some used welding cable he is willing to sell me at a good price. I am going to use it on my ev project and initially using 72 volt system. He said that it is standard welding cable, but not sure if it is 1/0 or 2/0 cable. Do any of you see any problems with using this cable if it turns out to be 1/0 cable? (his cable is over 100' long now)

Thanks

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 04-16-2013, 09:44 PM   #2 (permalink)
Master EcoModder
 
RobertISaar's Avatar
 
Join Date: Jul 2012
Location: camden, MI
Posts: 324

MC SBX - '95 Chevrolet Monte Carlo LS
Last 3: 29.75 mpg (US)
Thanks: 7
Thanked 55 Times in 46 Posts
0 and 00 cable will stand up to some serious amperage.... how much current are you planning on pushing?
__________________
  Reply With Quote
The Following User Says Thank You to RobertISaar For This Useful Post:
RobW (04-17-2013)
Old 04-16-2013, 10:17 PM   #3 (permalink)
Master EcoModder
 
Ryland's Avatar
 
Join Date: Jan 2008
Location: Western Wisconsin
Posts: 3,903

honda cb125 - '74 Honda CB 125 S1
90 day: 79.71 mpg (US)

green wedge - '81 Commuter Vehicles Inc. Commuti-Car

Blue VX - '93 Honda Civic VX
Thanks: 867
Thanked 433 Times in 353 Posts
Voltage Drop and Cable Size Calculator

The larger the cable size the less voltage drop you will see and the less energy you will waste in the cable.
But there is no way to say what size cable is idea for your vehicle because we don't know the vehicle, the controller or even the batteries!

2/0 should be good for 500+ amps and lead acid golf cart batteries tend to top out at 500 amp peek, but you'd never want to sustain that, of course if your battery pack is split up and you have a few batteries in front and a few in back and a few hidden in some other corner then you could end up with some long wire runs and those you'd want to be larger then what you use for interconnects between batteries, but you also need to look at the total amount of electrical cable that you are using in your battery string.

For most smaller passenger cars I'd say that 1/0 is just fine, you might notice a difference while climbing hills or accelerating.
  Reply With Quote
The Following User Says Thank You to Ryland For This Useful Post:
RobW (04-17-2013)
Old 04-17-2013, 07:06 AM   #4 (permalink)
EcoModding Lurker
 
Join Date: Apr 2013
Location: East Tenn
Posts: 19
Thanks: 23
Thanked 3 Times in 3 Posts
Well I'm not sure about the current, but I am going to use an open revolt controller, and the batteries are large truck 12 volt batteries grouped together for 72v in the trunk area. I figure approximately 12 feet run to the controller under the hood. My car is a 1983 760 Volvo. I have an electric motor out of a Caterpillar forklift 36/48 volt.
  Reply With Quote
Old 04-17-2013, 08:30 AM   #5 (permalink)
Super Lurker!
 
Slow_s10's Avatar
 
Join Date: Sep 2012
Location: Chesapeake, VA
Posts: 88

Rusty - '88 Chevrolet S10 base
90 day: 23.72 mpg (US)

Doc - '08 Honda Civic EX-L
90 day: 29.6 mpg (US)
Thanks: 4
Thanked 14 Times in 11 Posts
Well if you are getting 100' of cable and you only need to make a 12' run you could always double or triple up on the cable run if you don't think the single run of 1/0 would cut it.
__________________
-Kevin
  Reply With Quote
The Following User Says Thank You to Slow_s10 For This Useful Post:
RobW (04-17-2013)
Old 04-17-2013, 08:55 AM   #6 (permalink)
EcoModding Lurker
 
Join Date: Apr 2013
Location: East Tenn
Posts: 19
Thanks: 23
Thanked 3 Times in 3 Posts
I guess I didn't make my previous post clear, my friend is only going to sell me 40' of cable. two sections of approx 20' (or less) One for Positive, one for negative. Just to clear things up. Thanks Slow S10! Good idea!
  Reply With Quote
Old 04-20-2013, 02:00 AM   #7 (permalink)
Master EcoModder
 
Join Date: Sep 2010
Location: Saskatoon, canada
Posts: 1,460

ChargE (not yet running) - '92 Mazda MX6 LX
90 day: 33.89 mpg (US)

Ford Prefect - '18 Ford F150 XLT XTR
Thanks: 741
Thanked 538 Times in 433 Posts
Good enough for lead

Quote:
Originally Posted by RobW View Post
...using 72 volt system... Do any of you see any problems with using this cable if it turns out to be 1/0 cable?
Listing a few assumptions, mostly repeated from the other posts:
- Worst case is that the batteries are connected to the controller with bus bar, and that the cables from the controller to the motor are 20 feet long so the 1/0 motor cables see 500A for the longest time
- 500 amps peak (that's all the ReVolt will put out, right?) on 20 feet of 1/0 is about 2.5V of voltage drop, just over 3%
- The lead batteries won't supply that amount of current for long, so the cables won't be dangerously overheating. They may get warm to the touch!

I would have no concerns with the wire size if it were my project.

  Reply With Quote
The Following User Says Thank You to thingstodo For This Useful Post:
RobW (04-21-2013)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com