Wiring many lights

I have reviewed the AWG wire gauge to ampacity chart and will add .5a fuses on the feeders. 

You're overdoing the fuses. With fixed lighting, the current requirements will be very steady. Depending on what type of lighting you're using, the estimated current requirement can be calculated and then you just need one fuse to protect the whole deal.

If the lighting arrangement were to be changed often, then you might want more protection.

Thanks. my concern was protecting the fine wire at the individual bulbs. They are standard bulbs, not leds and some of those wires are very fine. In the process of hooking them all up we had one short out and melted the wires. Made a believer out of me about shorts.   

Take a look at Woodland Scenics LED plug and play  more effective, I'm replacing many old std lights and installing more.

Email me and I will send you some resources that will save you time and money.

I would consider the wiring and lighting going to the fixtures, buildings, etc,  as sacrificial. Just put a main fuse and leave the rest alone. I'd be more concerned with a short taking out the transformer than the other way. Those small gauge wires will fry instantly no matter what you protect them with.

Put it in house wiring perspective- a typical lighting/ convenience circuit protected with a 15 amp breaker- you wouldn't put a separate fuse in each light fixture-  and the wiring in them is much smaller than the 14 awg house wiring.

Bob

I use a computer power supply for all my lights and accessories that will run on 12 vdc. The response to a short is instant, no matter what the wire size, and I have circuits on 3 amp resettable breakers.