Question by Mountain: For model train power supply’s, there is a set maximum safe voltage but what about amperage?
What if I connected a car battery to my G Scale train; It’s only 12 volts and they can go to around 20 at least I believe; but what about the 800 amps?
Answer by railbuff
The amps would be a no-no.
A typical HO scale locomotive operates well at between 0.4 and 1.6 amps, the higher indicating a too-heavy load or a lot of dirt. That’s why you need a voltage regulator to ensure that no more than 4-5 amps gets into the track (for more than one locomotive.) O scale trains are not mich higher than HO, and N scale trains can be half the amperage.
For all scales, see the manufacturer’s specs – safest way to avoid burning out the motor.
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