Found this slip ring on Ebay. Looks like it might be using 10 ga wire. http://cgi.ebay.com/30A-3-Slip-Ring-Complete-Kit-Wind-Turbine-Generator-/160556304399?pt=LH_DefaultDomain_0&hash=item2561e6c80f
Dont need it tom,Even if I have to replace 6 ft of 10 guage once a year,I am very happy.My turbine is heavy enough that it doesnt move around much.Never even seen it spin around a full revolution in strong wind..