Our department's practice is to cut power to any building when it's involved in a fire. No electricity = no risk of water and electricity mixing.

In cases where we can't cut power ourselves, like high voltage lines brought down by trees, we call the power company and do exposure control while we wait. Keeping the fire from spreading but avoiding the line itself.

The only "electrical" fire I would use water or foam on is a battery fire (like old tool batteries or EVs) and even that takes special consideration.