[ajb]

Not really. It's not massively likely, but if you do manage to drill into one fixing it is pretty costly. And that's not taking into account the risk of electrocution

Check out the Gosforth Handyman on how to avoid pipes and cables: https://www.youtube.com/watch?v=DeTXAPYzqpY

(Note that the rules he describes on where cables should be are from UK regulations - other jurisdictions will have different rules).