SE on Steel because, like water, metal conducts electricity
SE on water because, like metal, water conducts electricity
SE on Grass because lightning strikes make trees explode
SE on Psychic because you can't think when you're getting electrocuted
SE on Ghosts because the Ghostbuster's equipment ran on electricity
SE on Dragon because the dragons in Dark Souls were weak to lightning
SE on Ice because Ice is just frozen water
SE on Poison because electrolysis can change the chemical composition of some poisons
SE on Dark because lightning pierces the dark
SE on Fire because lightning is hotter than fire, and that makes fire feel insecure
SE on Fairy because epilepsy is an epidemic among fags
SE on Bug because bug zappers
SE on Rock because batteries are heavy and can crush rock probably
SE on Fighting because people under the effects of a Taser are not good at punching
NVE on Flying because, since flying birds are not in contact with anything, there is no electric potential difference thus electricity is not attracted to them, unlike creatures on the ground, such as golfers or giraffes
No effect on electric because, since electric-type pokemon have the ability to generate and hold a charge instead of losing it to the Earth, they probably have some method to insulate themselves
No effect on Ground because the Earth can absorb effectively infinite charge, which is why the ground is used to literally ground circuits
Neutral on normal because it's normal