What happens when you enclose a warm space in your home that no one ever goes into? That's right, it becomes the perfect home for mice! Mice are often found in the electric panel because they are warm and isolated. Also, if the penetrations are not properly sealed, it really becomes an issue. obviously this is common, but it is also a safety issue. consider having an annual home inspection to find issues such as these and to protect yourself and your family.
Devereaux Van Dyne, Certified Professional Home Inspector