items transmitting current, (wires alternators ect) emit a spark particle, this would be nice to just show that power is moving without needing a multimeter. and it would be a cool ambience in factory's

you could also make more intense devices deal electrical damage and require rubber gloves or something similar to be in the inventory to avoid it

1. Could be cool but, would have too large of a performance overhead.
2. I've stated before that I dislike that mechanic (Immersive Engineering) and will not implement it.