N gauge model railway voltage?

Question

my dad has an old n gauge railway and im wondering if anyone knows what voltage they run on

Answer 1

It would be nice if you had defined "old" !!

In accordance with the National Model Railroad Association standards and practices S-9 (Electrical), last revised in 1984:

"This STANDARD establishes ELECTRICAL requirements for interchange and safe and satisfactory performance of two rail equipment on model railroad layouts.

I. POWER

A. Full throttle voltage available at railhead shall not be less than 12 volts direct current at maximum anticipated load."

My current DCC system operates on a system that provides 12-15 volts DC.

Answer 2

12 volts, stepped down from the mains using a transformer which you can get from any model railway equipment supplier.