Power cable sizes

Antique, Hybrid, Solid State, SDR, QRP, all types
Post Reply
User avatar
VE3OSA
Posts: 35
Joined: Mon Jun 05, 2017 2:06 am
Contact:

Power cable sizes

Post by VE3OSA » Sun Oct 08, 2017 9:36 pm

Hey all
I am wondering about power cable gauges. I was looking at power pole connectors. The ones rated 30 amps are for 16-12 awg. I thought 30 amp wire gauge was 10 awg. Is it ok to use 14 awg (middle)?
What size do you use for power cables?



VE3PCP
Posts: 57
Joined: Tue Jun 27, 2017 5:10 pm

Re: Power cable sizes

Post by VE3PCP » Mon Oct 09, 2017 12:13 pm

Here is a chart that shows voltage drop vs conductor size and length for 12V.
You can use smaller than #10 for 30A but the voltage drop increases. The drop will result in heat and eventually failure.
So if you used 10' of 14 ga for 30A, you wold see a 10% voltage drop.

Image

User avatar
VE3OSA
Posts: 35
Joined: Mon Jun 05, 2017 2:06 am
Contact:

Re: Power cable sizes

Post by VE3OSA » Mon Oct 09, 2017 7:42 pm

Thanks Rob, I'll stick to the 45 amp powerpoles.

Post Reply