I will have access to a concrete foundation wall space before the pour and I would like to embed a simple closed loop trip circuit to deter against the remote possiblity of a break in from the basement. (This is a commercial installation. The wall will be at least 8" thick and have rebar inside for strength.
What type of wire/cable would be best?
Here are my concerns.
I don't want to use bare copper in the concrete because of oxidation/deterioration concerns and the possiblility of accidental grounds.
The wire or cable should be mechanically thick enough to last a long time (many many years), but readily break if the wall is attacked with drilling, sledge hammers, etc.
What materials would be best for concrete? Would you use a plastic or metallic sheath? ...Possibly PVC?
Any suggestions or advice would be greatly appreciated.