Another Electric Fuel pump wiring question.

So doing the wiring for my electric pump on my Dart, to feed my new 5.9

I was going to follow the basic wiring diagram below that I printed off a "how to build hot rods" website. It shows wiring through a relay, and oil pressure switch, which I am doing. (but shows no breakers or fuses)

My question is more about breakers and fuses.

The diagram that came with my carter pump, shows putting an inline fuse in the 10ga line going to the pump.

My Summit fuel pump relay came with a 30amp breaker and shows putting it in the 10ga line between the battery and the relay.

So do I need to use both the breaker, and the inline fuse, or one or the other. Or neither...lol