Right now, NORAD would be involved if, for example, they used a jet to crash into one of the major electrical nodes. That's when NORAD would get involved. NORAD right now doesn't have that sort of land mission warning, and I'm guessing that's probably how an attack on an electrical grid would take place—or via computer. So for right now, no.
However—and again, Dr. Fergusson mentioned this a number of times—NORAD has this unique North American picture. We may not think a plane flying in a diverted air path is significant, but when you take that, look at the maritime picture, and have the luxury of being able to look at both together from a North American point of view, then maybe NORAD can help contribute to warning other agencies about a potential attack on an electrical grid. But right now, NORAD doesn't have that mission per se.