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Re: Battery power to the ammeter gauge on an old tractor?


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Posted by John T on January 04, 2011 at 06:57:12 from (66.87.8.16):

In Reply to: Battery power to the ammeter gauge on an old tractor? posted by rasman57 on January 03, 2011 at 20:57:35:

Id probably use 8 Gauge from the alternator output to the ammeters LOAD TERMINAL and from the ammeters other SUPPLY TERMINAL to the battery. Theres only one wire on the SUPPLY thats to the battery while the LOAd is where the alternators output wires along with feeds to loads like lights and ignition.

Often when lay persons consult a wire gauges ampacity chart they look at enclosed conductor ratings versus single conductors in free air which can carry more current. A person could even run 6 gauge while 10 probably still wouldnt overheat so bad the insulation is damaged. It dont hurt to use overkill in bigger wire as it reduces voltage drop.

A typical place for attaCHMENT IS WHERE THE BIG BATTERY CABLE ATATCHES TO A STARTER SWITCH OR SOLENOID as a huge cables goes from there right to the battery.

The alternators output is where the highest current flows so Id run 8 gauge from the alternator output to the Load (NOT battery) side of the ammeter and then from the Supply side of the ammeter to the starter post.

John T


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