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02-10-2010, 07:11 AM | #1 |
Gone Wild
Join Date: Jan 2010
Location: LA (Lower Alabama)
Posts: 276
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4g vs. 2g revisited
I checked with a local welding shop after asking the question about upgrading my wire size on my 87 cc 36 volt. I can get a roll of 4g (25ft) for about $40 and 2g for about $60. This seems to be high quality fine strand wire. The guy was very nice explaining that if I gave him the lengths he would crimp all of the lugs on for me... better than I could. The question is, is it worth it (extra $20 or so) to go with 2g? Any downsides to larger wire etc? I am assuming 25 ft. would be enough for all of my runs.
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02-10-2010, 09:17 AM | #2 |
Gone Wild
Join Date: Mar 2009
Posts: 256
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Re: 4g vs. 2g revisited
If you ever upgrade to a 500 amp controller or larger you will need 2 ga.
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02-10-2010, 09:30 AM | #3 |
Getting Wild
Join Date: Oct 2008
Location: North Carolina
Posts: 99
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Re: 4g vs. 2g revisited
For $20 why not? Also, you'll want to solder the connections not just crimp them.
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02-10-2010, 09:52 AM | #4 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,344
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Re: 4g vs. 2g revisited
4g will suffice for all but the most extreme builds Like Kdawg's wheelie machine. I have built a few 450 - 650 amp controller 48v converted CCs with 4g wire and Soldered lugs. Never a problem or complaint. The wires will last as long as the batteries so they are a renewable part. 4g is enough for all but the carts which can draw more than 400amps with big motors etc. Hope this helps.
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02-10-2010, 07:46 PM | #5 |
Gone Wild
Join Date: Jan 2010
Location: LA (Lower Alabama)
Posts: 276
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Re: 4g vs. 2g revisited
I was told to use "silver solder" is this a must?
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02-10-2010, 11:40 PM | #6 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,344
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Re: 4g vs. 2g revisited
I guess not? ..... It just makes the best connection.
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02-10-2010, 11:44 PM | #7 |
Gone Wild
Join Date: Mar 2008
Location: Rockwall, Texas (Dallas / Ft. Worth)
Posts: 7,077
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Re: 4g vs. 2g revisited
4 gauge is sufficient for your resistor cart. A good cable crimper is also good. Solder isn't as much a need as a proper crimp - IMO...
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02-11-2010, 09:20 AM | #8 |
Gone Wild
Join Date: Jan 2010
Location: LA (Lower Alabama)
Posts: 276
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Re: 4g vs. 2g revisited
As I understand soldering with silver solder requires the heat of a torch on something this thick? Would you recommend removing some of the outer cable coating and replacing it with heat shrink? Also any advice on what % silver content and were to buy? (radio shack, welding shop etc.)
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02-11-2010, 09:30 AM | #9 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,344
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Re: 4g vs. 2g revisited
Silver solder can be found a Lowes/HD or any plumbing supply store. You need a torch and flux. if you are unfamiliar with solder you may want to use the crimp method? Some like the shrink wrap ... I use liquid rubber for an airtight seal. There is no right or wrong way to do it. Just figure out what will work best for you to get the most solid air tight seal and keep them clean and the nuts tights for a long useful life.
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02-11-2010, 09:38 AM | #10 |
Gone Wild
Join Date: Jan 2010
Location: LA (Lower Alabama)
Posts: 276
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Re: 4g vs. 2g revisited
So it is either crimp or solder... but not both...
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