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Reply to "Theoretical Electrical Questions: Do more feed wires means less heat?"

Regardless of the Ohm's Law calculations, I would observe that my experience is that an AC voltmeter at the end of a block in which a heavy electrical load train is operating always seems to indicate that there is greater voltage drop than The Law would indicate should be found.  That is the ultimate test of whether wire is heavy enough, connections are good enough, and track joints are adequate.

I would also note that the output voltage of a transformer may or may not be what the dial or integral voltmeters indicate, and may drop when a good load is applied.

One way to find the cause of voltage loss is to connect an AC voltmeter between any two points on the same feed.

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