wire size

Hi all
Just a quick qustion.
I and my mate Brian are collecting bit for our new coil we now have a
15kVA pole pig
from Steve Rodway and we are building the new poly plate cap.
The coil form is 9" by 50" thin wall plastic pipe(gray plastic).

What is going to be the best choise of wire to give us somewhere between
800 and 1000
turns with a winding lenght of about 40"-45".

Cheers Mike(UK pig owner)Tucknott  

"He tames the thundering bolt of jove and annihilates time and space"
Nikola Tesla 1906