[l2ridehd]

Just checked and here is what they say. This is from a 1988 handbook.

The NEC (National Electrical Code) says that if wire is run through a hole drilled in a framing member the hole edge must be at least 1 1/4 inches from the edge of the board to protect the wire from nail and screw penetration. If this distance can't be maintained a nail plate must be used.

And in Florida, all wires and plumbing that went through a stud had to be protected with the metal plates.

Florida went the one step further then code and required it on all regardless of depth of wire or pipe. So the question really is did you use a really long screw? As that would depend on NEC being broken or Florida code or both.