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Unread 02-11-2010, 05:14 PM   #1
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Default Wire Sizes = Gauge?

OK

Today i took out all the trogans from under my hood, man they were heavy.

Fixed all the battery tray as per golfcartfixer/scottyb's other posts.

What i did notice is that two of the interlinking battery cables were smaller that the rest, however they were the same size as the ones to the F/R switch, Controller, Solenoid and Motor.

So not knowing the sizes in gauge i measured them with a vernier as follows

Larger cables OD 0.375 inches over the insulation
Smaller cables OD 0.315 inches over the insulation

Does anyone know what gauge cables these are?

With a stock 3.1Hp motor and a 300amp non programmable Curtis controller what gauge do i really need to have? Is it the bigger the gauge the better with regard delivering the max to the motor.

Thanx
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Unread 02-11-2010, 05:55 PM   #2
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Default Re: Wire Sizes = Gauge?

Gorhad the size outside won't count because some cable has thicker insulation.
With a stock 3.1Hp motor and a 300amp non programmable Curtis controller what gauge do i really need to have? Is it the bigger the gauge the better with regard delivering the max to the motor.
That is true to a point. you want to get every thing you can but there is a point were it doesn't do any more, 4 gauge is the largest you need unless you do some serious upgrades.
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Unread 02-11-2010, 06:56 PM   #3
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Default Re: Wire Sizes = Gauge?

Thanx DOOmsman

Do you have any idea what sort of top speed it should be pulling (just approx)
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Unread 02-11-2010, 07:09 PM   #4
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Default Re: Wire Sizes = Gauge?

I am not a sparky guy and have very little smarts about electric carts.
Some one else will jump in.
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Unread 02-11-2010, 07:11 PM   #5
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Default Re: Wire Sizes = Gauge?

OK much appreciated
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Unread 02-11-2010, 07:13 PM   #6
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Default Re: Wire Sizes = Gauge?

In the mean time is this the bird you lost?

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Unread 02-11-2010, 10:19 PM   #7
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Default Re: Wire Sizes = Gauge?

Gorhad, a 3.1hp motor is what I used to have in my 03cc, with a 275A stock controller, and 4ga wires, and I was getting about 14mph. Hope that helps give you an idea.
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Unread 02-11-2010, 10:32 PM   #8
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Default Re: Wire Sizes = Gauge?

Heres how I would look at it, the worst case is it would be braging rights, my wire is bigger than yours

But on the other side, a motor can pull a lot of amps, what size is the wire that feeds your house, whats that amperage, 125-200, now I know its a diff voltage, but the basic thing applies, the more low end punch you may get to a point, but the larger the wire the more amps it can handle before it starts to warm up, for longer periods of time, so if you have the extra money, put it in what you can, that way you wont wonder if you should of in the first place.


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Unread 02-12-2010, 09:06 AM   #9
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Default Re: Wire Sizes = Gauge?

It is very difficult to compare AC voltage to DC voltage.
AC has a sine wave and alternates on both sides of 0, DC is a constant, either positive or negative voltage, and doesn't cross 0 like AC does.
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Unread 02-12-2010, 09:59 AM   #10
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Default Re: Wire Sizes = Gauge?

Quote:
Originally Posted by buscopat View Post
It is very difficult to compare AC voltage to DC voltage.
AC has a sine wave and alternates on both sides of 0, DC is a constant, either positive or negative voltage, and doesn't cross 0 like AC does.
O your right, But we are looking to improve something, bottom end punch, as long as you have volume, the larger the hose (wire ga), the quicker things can fill up (power available to the load (motor), in some cases, it may be small, but still an improvement, if the wires are heating , then I would go to a larger wire, and strand wire at that. If your going to keep the buggie, then it is the same amount of work to replace 4ga as it is to go with 2 ga, the diff is just the cost of the wire in most case,s. If the wires are getting warm, then that in it self is now part of a load or restriction whichs makes a type of load, or robing power from the batterys, and motor, if you could reduce or get rid of any heat in the wires by increasing the GA, then you are allowing more amp to flow to the motor, and not being consumed by another load restriction, such as under sized wires.

Gunny
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