Originally Posted by S&MLL
In nj it does and im pretty sure its a nec thing...... yes 6 inches under the lawn but 18"under a walkway.
So much for all you flex bitters at 4"s haha
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That doesnt make ANY sense. That wire is just as safe 4" as 18". In fact under a sidewalk is probably the safest place in whole yard for a wire! Have fun diggin! Flex bit here i come!