Ronnie,
It "all depends"
I use 12 gauge myself, but the runs are less than 6 feet.
For longer power cables, I would use 10 gauge or larger.
#10 is .000999 ohms per foot
#12 is .001588 ohms per foot.
For 12 feet of conductor (yes, you have to count the resistance both
directions) - at 18 amps current draw, the #10 will produce a .22 volt
drop while #12 will produce a .34 volt drop.
So take your pick, either increase your power supply voltage to
compensate or go with the larger wire.
73,
Don W3FPR
On 8/11/2016 11:43 AM, Ronnie Hull wrote:
Is 10 gauge necessary?
Sent from my iPhone
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