Originally Posted by
donf
There are very strict codes regarding the use of electrical circuits near pools.
So let's start this way, how close to the pool are these receptacles?
You said you made the extension cord using 10/2 with ground, correct, did you put a plug at both ends of the cord? Or a receptacle at one end and a plug at the other?
If the GFCI keeps tripping, then you need to make certain that the extension cord is not the problem. The GFCI is designed to protect people from getting shocked. It will trip if it senses a 6 ma difference in current between the neutral (white) and source (black). Also, I do not believe that you should be using a self made extension cord anywhere near a pool.