Your lawn sprinkler should cause no more damage to your invisible fence than a good rain.
Invisible fences can be used in conjunction with lawn sprinklers as long as the fence cable or antenna – the wire which constitutes the fence line and carries the current – is properly waterproofed. Some invisible fences and lawn irrigation systems are sold together by certain companies. Breaks in current, or shorts, are usually caused by breaks in the wire or improper installation, but rarely by water from rainfall or sprinklers.
Courtesy of By Angela Baird, eHow Contributor , last updated October 12, 2011
Read more: Can Invisible Fencing Be Used if You Have Sprinkler Systems? | eHow.com