Hi, another new guy here...  Large track question.

I plan to install a train shelf that goes around the perimeter of the ceiling of a room.  14ft x 14ft.
HO scale.

I have little train knowledge.  I do know how to measure and calculate Volts, Amps, Ohms, Watts, and how to use a multi-meter.

Will a normal HO train set supply enough power for a loop this big? 

Or do I need to add another power supply? 

Thanks.