The easiest and cheapest way of challenging this, may be to assemble all the facts, and then arrange for a legal opinion, from an experienced strata lawyer.
Or ask the chair, strata manager or building manager if there is a valid reason why this by-law was passed in the first place. You may find it was one influential person’s problem … or there are valid reasons.
You don’t have to go to the barricades on every issue.
As I’ve said before, my block has a similar ban and the majority of owners would rescind the by-law in a heartbeat if there weren’t issues with the power supply.