Lightning Strike on Irrigation Controller: GFCI Wiring Dispute

Tree struck by lightning twice; irrigation controller blown off wall and burned. Electrician claims GFCI was miswired (hot loose outside, ground connected to hot inside). Irrigation company denies fault, says system shouldn't use GFCI or grounding. Homeowner seeks impartial facts.

Controller Grounding Reality

"The controller wouldn't matter whether it's on a GFI or not. Irrigation controllers routinely aren't grounded unless part of a large system (golf courses)." The key question: who wired the GFCI? If the irrigation contractor just plugged into an existing receptacle, they're not liable for the receptacle's wiring.

Lightning Protection Limits

"I can say reasonably certain. The controller would have blow-up whether it was on a GFI or not. Lightning strikes on or around a home usually gets the irrigation controllers. They have a wonderful grounding system with the wire which goes out to the valves. No grounding would have prevented a close strike from cooking the controller."

Action Items

• Homeowner's insurance should cover the lightning damage.
• Whoever replaces the controller must also check the valves—solenoids often burn out too.