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Old 11-29-2012, 08:25 PM
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mannanj mannanj is offline
Join Date: Jan 2005
Location: Mtns of N.E. Georgia
Posts: 1,322
Default Wire size

Originally Posted by SmilingJack View Post
I did exactly like you mapped out.

For 1,2 & 3 I used #2AWG
Ditto above. I would run a second #2 wire for the airframe ground from the negative battery post forward to the firewall. Do not ground the battery locally at the rear battery mount. It will eventually let you down. Ground all your avionics etc. at the firewall terminus of the ground wire run. Some things such as landing lights, nav lights etc. can be locally grounded, but the important things should be grounded at that firewall ground terminal. This will keep radio noise, ground faults and other gremlins at bay.

Be sure to ground your engine crankcase and alternator frame to this same terminal.
Mannan J.Thomason, MSGT. USAF (RET)
"Bucket List" checkoff in progress!
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