Hi Everyone. I am rebuilding my railroad (for the nth time!). Normally, I make a power bus using copper tape but this time I thought that I would make it with wire. So, I need a bit of advice.

The railroad is to be in an L shape (see diagram of the room) roughly 8' by 8' and 2' wide.

So what size wire do I get as droppers and what sized wires for the bus? 

What do you call the snap connectors that can connect the droppers to the bus without tools?

Thanks in advance for your help

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