The factory brochures called out the 15A figure, even though the 16GA wire on a 12VDC system is truly at it's industry standard safe limit at 13A. The 10A main slow blow fuse aids in protecting the harness from a total meltdown.
Since the harness is approaching it's maximum current limits, this might be one reason I find tons of melted plugs, and overheated connectors on these older tractors. You get a small amount of resistance caused by loose or corroded connections, then it turns into heat.
The ammeter on these is rated at 20 Amps. On a few of these tractors I've owned or worked on with a somewhat discharged battery, that ammeter's needle is almost to the second hash mark at full engine speed.
Attached is a pic of the replacement current MTD issue 925-3141 ammeter. The original ammeter does not have numerical graduations.
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582, 682, 782, 782D, 1282, 1050, 1210 x 2, 1711, and 1811
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