[santon]

I have some alarm cables within a long ceiling run in a corridor and looks as though rodents have bitten through.
Unfortunately the site is next to number of takeways with lax hygeine policies and also some communal rubbish bins.
I realise that the best answer would be to get rid of the rodents but realistically I need to physically protect the cables. As there are joists every 18 ins or so rigid conduit is out unless I run it along a wall below the ceiling. It won't be feasible to regularly get access for baiting.

Any ideas please?