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Unread 05-11-2018, 09:27 AM
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2 AWG Battery Cables

This year are team is thinking about switching to 2 AWG battery wires and SB120s but only if the price is reasonable. I was wondering if someone could recommend a low cost supplier for 2 AWG welding cable as well as an affordable but high quality crimper for the SB120s.
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Unread 05-11-2018, 09:30 AM
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Re: 2 AWG Battery Cables

The hydraulic crimpers from Harbor Freight/Amazon work really well.
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Unread 05-11-2018, 09:45 AM
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Re: 2 AWG Battery Cables

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The hydraulic crimpers from Harbor Freight/Amazon work really well.
Don't know about Amazon but we got a hydraulic crimper from Harbor Freight a few years back that self-destructed the first time we used it (literally liquid spewing out of it onto everything)... never again.
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Unread 05-11-2018, 10:02 AM
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Re: 2 AWG Battery Cables

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Don't know about Amazon but we got a hydraulic crimper from Harbor Freight a few years back that self-destructed the first time we used it (literally liquid spewing out of it onto everything)... never again.
Bought one made on a Friday shift huh?
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Unread 05-11-2018, 10:24 AM
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Re: 2 AWG Battery Cables

Don't skimp on the crimper or wire. You can ruin the benefits of converting if you do. Cheap crimpers won't crimp well and will break. Cheap wire won't be flexible enough and trust me when dealing with that size of wire in small space on a FIRST robot you need all the flexibility you can get.

The initial investment was pretty rough (crimper, converting chargers and all the batteries) but now that we have paid that life will be much cheaper.

Very happy that we did it.
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Unread 05-11-2018, 10:24 AM
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Re: 2 AWG Battery Cables

One post.
Two post.

The thing to keep in mind: an industrial crimper of this size can easily run $1k or more. Affordable is relative.
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Unread 05-11-2018, 10:59 AM
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Re: 2 AWG Battery Cables

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Bought one made on a Friday shift huh?
Just before Christmas break....
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Unread 05-11-2018, 11:02 AM
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Re: 2 AWG Battery Cables

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One post.
Two post.

The thing to keep in mind: an industrial crimper of this size can easily run $1k or more. Affordable is relative.
Red post, Blue post?
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Unread 05-11-2018, 11:17 AM
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Re: 2 AWG Battery Cables

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Unread 05-11-2018, 11:19 AM
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Re: 2 AWG Battery Cables

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Quote:
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Red post, Blue post?
Why make a new post?
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Unread 05-11-2018, 01:57 PM
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Re: 2 AWG Battery Cables

We made the switch to 4 AWG and SB120 this year following the linked posts. Costs were

~$10 per connector ~$200
$60 for 25' ea of cable

We used the Harbor Freight hydraulic crimper. Worked perfectly for us. We also used it to crimp swage sleeves on wire cable for our elevator.
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Unread 05-11-2018, 01:58 PM
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Re: 2 AWG Battery Cables

How many teams actually do this? I assume the purpose is to reduce resistance in the wiring and therefore the chance of brownouts?

Also, is the 2AWG used only on the battery terminals (and not the connector to PDB, which is 6AWG)? In this case, no additional measured weight is added to the bot from the thicker wiring.
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Unread 05-11-2018, 02:04 PM
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Re: 2 AWG Battery Cables

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What do you think this is, your computer playground? Let's keep posts serious on this forum!
From there to here, from here to there, funny things are everywhere!
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Unread 05-11-2018, 02:19 PM
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Re: 2 AWG Battery Cables

Quote:
Originally Posted by seg9585 View Post
How many teams actually do this? I assume the purpose is to reduce resistance in the wiring and therefore the chance of brownouts?

Also, is the 2AWG used only on the battery terminals (and not the connector to PDB, which is 6AWG)? In this case, no additional measured weight is added to the bot from the thicker wiring.
We run 2awg from battery to PDP. The weight is a worthy investment IMO, and further rewards the good practice of minimizing main power wire length.
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Unread 05-11-2018, 02:33 PM
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Re: 2 AWG Battery Cables

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Originally Posted by JamesCH95 View Post
We run 2awg from battery to PDP. The weight is a worthy investment IMO, and further rewards the good practice of minimizing main power wire length.
^^^^ this
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