Wire size 60 amp @75ft

Electrical work requires permits and inspections most places... do you have an Electricians license or at least are you working with a licensed electrician?

As Smoothy says use caution...
But here's a web address: Wire Size Calculator (http://www.csgnetwork.com/wiresizecalc.html)
Careful! Hope this was helpful

Is this cable needed for a 240 Vac circuit? Do you require a Neutral for this circuit? Is the circuit for indoor or outdoor use, above or below ground?