More expensive, but worth it. Usually used for remote control gear but as it's 600V rated you could even use it for mains wiring. Shame I can't make car jump start leads with this wire. The flex of it is superb. Links:
Where I got the wire:
http://www.ebay.com.au/itm/131712518680?_trksid=p2057872.m2749.l2649&var=431089404027&ssPageName=STRK%3AMEBIDX%3AIT
AWG ampacity chart:
https://wiki.xtronics.com/index.php/Wire-Gauge_Ampacity
Power supply used:
https://www.amainhobbies.com/protek-rc-super-pro-1000-five-output-world-edition-power-supply-w-usb-port-30v-40a-1000w-ptk-pro-1000w-sp/p190178
