bob haller wrote:
On Mar 7, 1:10 pm, "John Grabowski" wrote:

*There are metal electrical boxes made for masonry which you should
be able to get at an electrical supply house. Raco has the #690 one
gang which is
2.5" deep or the 695 which is 3.5" deep. Steel City numbers are
GW-125-G for the one gang 2.5" and GW-135-G for the 3.5" depth. The
masonry boxes are also available in multiple gangs. Don't use
plastic boxes for this. I am not sure they are approved for this
type of installation.

It sounds as though you have terracotta block. . . .

OP should stud out te walls for insulation, fact is if the job has a
permit its likely required.

I didn't think that insulating the outside walls will be required, but maybe
it will -- so I'll check that out.