Courtney,
http://www.ancorproducts.com/
look under technical information

Be aware that even these people are stuck in % voltage drop when at 12v
you very often have to be concerned more with actual value and not
percentage of supply.

Matt Colie

Courtney Thomas wrote:
Is there an online chart of wire sizing for 220v, 110v and 12v wiring ?

Thank you,
Courtney