I was wiring an A/C unit replacement today at a townhouse. The old unit was wired with 6/2 AL and was on a D.P. 60amp circuit breaker. Company policy in this particular situation is to NOT USE the old wiring and install a new circuit. I simply "boxed-off" the old 6/2 AL and disconnected it at the panel. Is there a code in the NEC that disallows doing this?
