Electure, I've wired Carrier and various other brands. As far as I'm aware (out on a limb here) A/C units use a 5 core cable between the Evaporator and the Condensor unit, size of wire 1.5mm2 in my language. The load is usually only a fan motor and few control circuits at the Condensor end. Allow 8 wires, I will say this.
