Reply to "Atlas O Scale Operating Oil Pump: To me, a disappointment."

JFC454OGR Forum Member DIGITAL SUBSCRIBER

@Mannyrock posted:
Thanks guys for all of this great information, especially on the electrical side.
I have a follow up question: If electrical devices only draw what they need, then why are we putting 3 amp fuses in our electric line, between the transformer and train accessories? And, why aren't we connecting our train accessories directly to our constant output post with 18 volts AC?
Just trying to learn more.
Thanks,
Mannyrock

The fuses protect in case of a short. If the accessory is rated at 18v then it could be connected to a fixed 18v source. However, some accessories are rated for only 14v max. I run my Atlas switch machines from the fixed 14v terminal of a MTH brick even though they are rated for a higher voltage.

1/27/2112:36 PM

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