Basically most power supplies do not ouptut more than 12 volts dc for vontrolling trains. You must realise though that locomotives operate to 12 volts maximum and that is probably to high. Why have you asked are you looking for a control unit to operate your trains?
i am looking to get the nce 5 amp set . when i was reading the online manual at ncedcc.com,it sayed somthing about power lvl and it being too high and somthing being ruined becouse of the power lvl being too high. how many volts dc should be used for n scale.
I don't have an NCE set, but on my Digitrax DCS-100, there is a selector switch to set the voltage for N Scale, which the manual states is 12V. 12V max for N scale should be fine. You probably won't run your trains at max speed anyway.
Take care with DCC. The max voltage is always there !!! Within a locomotive, it is just a question of how long the decoder applys it to the motor through wave-chopping. This basically determines the speed. 12v. seems to be the "standard" maximum for N-scale.
