Hi,

I noticed there are SOME aluminum wires in the new home, specifically the
very thick rough-in cable (red, black, white and bare ground in the cable)
from outside to the main service panel, and the thick 240V cable from the
service panel to range outlet (same red, black, white and bare ground in the
cable) appear to be aluminum. All other branch circuits are copper. Does
this wiring comply with NEC code? Are they more likely to cause trouble than
copper and what particular care must be taken?

Thanks.

R