I haven't found any advice on my specific predicament, so I'll ask here. First, some background.
I just moved into a house with old electrical wiring (read: ungrounded outlets). Unfortunately, the area where I'll be working with static-sensitive devices (microcontrollers and similar devices) is in a carpeted area and the humidity here is very low. In other words, I will likely want to start using a wrist strap and anti-static mat for my work. However, I don't have anything to ground to.
While I know connecting ground to neutral in an actively used outlet is a silly idea, I'm wondering if it would be alright to use the neutral connection of an unused outlet to ground my mat and wristband. Since the outlet is unused the neutral wire should never be energized and always grounded.
If this is not a reasonable idea, does anyone have any better suggestions? (Rewiring is not an option for me as it's not my house.)
If it is a reasonable idea, I'm curious if it would also be safe to ground an active outlet with the neutral wire of an unused outlet. Not that I plan on doing that, I'm just curious if that makes sense (it seems like it would theoretically be fine given my understanding of how individual outlets are wired).