Reply to "The question of B units (from AB, ABA, or ABBA sets) in O gauge trains and why they DON'T SMOKE... Did the prototypes not smoke too? Or is this a cost saving / amp draw UL approval issue?"

B units are just A units without cabs. Essentially the same inside except control is from the A unit.

An old ZW would have no problem with an ABBA even if all had two motors plus smoke unit. Consider any modern transformer only outputs 200 watts max, ~20 volts @ 10 amps due to UL restriction. Even downrating a ZW its still pretty close.

Motor current draw is not the draw of a single motor times x number of motors. The load is distributed among all the motors. Example, One motor may draw 2 amps but 8 motors may only draw 5 amps. Actual numbers may vary.

Pete

7/16/173:32 PM

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