Originally Posted by irrig8r
Really? Never heard that reason. I've always done it to allow a solenoid enough slack to pull it out of the box if needed when servicing, yet keep the wires neat in the box. And I've never heard of a lightning ground strike around here in my 30+ years in the business.
Derryberry and Lefty both feel the coils work. I don't know Derryberry but i have read his book. Lefty didn't write a book but he did teach me a lot about sprinklers.
I can't say that coils work and i can't say that they do. What i can say is, i would rather use the coils and never find out they work than not use them and have a strike or spike damage and wonder, what if???
As far as no ground strikes in your area, you're in a good place. We get them often enough in Jeff.
In '73 a cowboy and his horse were struck and killed while working a gate (in the Hollister hills i believe) . I don't remember his name right now but i remember it was his 21st birthday.