All rodents will use semi-firm or firm materials such as plastic and wood to chew on to help keep their teeth sharp and short. The need something they can get their teeth round/onto, hence they will keep off the larger objects, such as coaches, and go for the smaller items. If too small it doesn't offer enough resistance so they are unlikely to chew it.
My local church suffers from squirrels in the roof space - I had to put in a quantity of plastic ducting and conduit to protect the electric cables feeding lights after a number of sections of cable were chewed several years ago. The trunking and conduit are too large for them to bite easily.
Best bet is to ensure they cannot get in. You may have to set traps if they persist.
Regards,
John
My local church suffers from squirrels in the roof space - I had to put in a quantity of plastic ducting and conduit to protect the electric cables feeding lights after a number of sections of cable were chewed several years ago. The trunking and conduit are too large for them to bite easily.
Best bet is to ensure they cannot get in. You may have to set traps if they persist.
Regards,
John