We have an "invisible fence" for our dogs. It uses a wall wart for the transmitter and also comes with a "surge protector" that the wall wart plugs into and the fence wire goes through.
There is a caution in the installation instructions that says to not install the protector unless there is at least 30 feet of wire between the outlet and the service panel.
That's a lotta' wire and I don't understand why it's necessary. Would I be better off not using the protector if it can't be 30' away? That's what it says, but sometimes instructions need to be interpreted.
Thanks