Not if your goal is to disrupt service to the end user.
Of course, the elephant in the phonebooth is protecting the high power lines that stretch across the continent. Thermite or any number of industrial cutting technologies could knock down a lot of those towers in a hurry, and crews trying to erect new towers would be difficult to guard.
States like Kaliporno can’t provide their own power locally.
There was a blackout along the west coast several decades after someone dynamited a power line tower in Oregon.
Never heard if they caught the guy (or gal)
>> crews trying to erect new towers would be difficult to guard.
Maybe in places like California. In 2A respecting flyover country you could deputize battalions of riflemen / deer hunters to pull overwatch security.
if they can get in that easy, cracking a couple of transmission voltage insulators can could cause widespread damage that would take weeks to fix.
But then again, the ultimate fear if the SOB’s know what their doing, is shorting the transmission voltage to the downside of a substation transformer. I won’t describe the calamity, but let’s just put it this way: it would probably get more news coverage then say... 9/11