I admit that my observation of newer plastic wire being more attractive to rodents than older insulation is subjective. I don't quite agree that a reference to equipment in Spain blows it out of the water for North America.
Originally Posted by Scoutr2
Rodents chewing on wiring is an age-old problem. I work on the service side of the business for Cat. We have a demo/training facility in Malaga, Spain I've been to several times. They are constantly replacing wiring harnesses on equipment that have been chewed up by rats. ...
There are many complaints about mice inside RV's. I don't recall many threads about rodents chewing brake wires on older units.
My 2001 23b had loads of mouse poop all over when I bought it. I found that Jayco didn't properly install the one plastic wheel well assembly. That left literally a 2 foot long 3/4" gap for the mice to run in and out at will. There were lots of places where things were chewed upon and destroyed for nesting material. I didn't find one wire chewed inside or outside of the entire camper.
The types of materials used to manufacture plastics and wire insulation have changed over the years.
Were I a poll type person (I'm not), it might be interesting to see an "RV Rodent Damage to External Wires" poll created. I suggest limiting it to external wiring because that is always accessible to the critters. Possibly use age breakdowns of:
2000 and older
2001 - 2005
2006 - 2010
2011 - 2013
2014 - present
That might provide some data.
I may be completely wrong about newer insulation being more attractive to rodents. If I am, then no big deal and I aplologize. If I'm correct it may give owner's of newer units a heads up so they can look for possible prevention.