Running long wire runs

I need to run outdoor wire from my breakerbox out about 200 feet. The wire is going to be on a 30 amp breaker. What gage wire and or type do I need to run? This will be going out to a pond to run thr pumps and lights.

 

Wire gauge selection is based on two things: (1) safety, which depends on the size of the breaker, and (2) voltage drop, which is dependent on the size of the load. For safety, you need 10-gauge wire on a 30-amp breaker. For voltage drop, you may or may not need larger wire, depending on the size of the load. Can you quantify the size of the load?

Perhap more importantly is that very few things can be legally run on a 30-amp breaker. Lights are certainly not one of them, and the pump probably isn't one of them either. So it is likely your whole plan is in question. Once you quantify the load, we can offer alternatives.

 

Thanks for the info John.
I do not yet know what the load would be. When you say load I suspect that you mean how may amps will be drawn?
I'm not limited to a 30 amp breaker. What would you suggest?

 

Yes, I mean how many amps.
A 20-amp breaker is the largest you can use.

 

However, if you need more than 20 amps, you could run a multiwire circuit and thereby double your available power, to 40 amps. Note however, that the length of the run must be factored in, along with the power required to determine the wire size needed.