The tag "electical" just a mis-spelling of electrical, and should be deleted.
I retagged the question with electrical.
I don't think we need do any more than that. The system automatically removes unused tags after 24 hours, so by this time tomorrow it will no longer be suggested when you start typing in the tags field.
For now, when you type "elect" in the tags field, the electrical tag is the first one suggested at the top left. "electical" is at the bottom right and is much less noticeable, IMO, so I doubt it'll be reused.