I need to run a new 20A circuit from the basement up into the attic and down
to a second floor bathroom. There is a very convenient chase containing
the copper hot and cold water pipes from the basement up to the attic and
down to this bathroom. If I run aluminum clad MC cable (12/2) in the
vicinity of the pipes (it will be somewhat loose hanging in the chase)
should I be worried about incidental Al/Cu contact and pitting/corrosion of
the pipes (or is it pitting/corrosion of the Al jacket?)

Thanks.