Quoted from pinmister:
I am curious what kind of surge protector should I be getting for my machines? I have been going to Wal-Mart and buying $12.00-GE brand 6 outlet- 1500 Joules? Other places have same price but only 600 Joules? How many Joules do I need for 2-3 pinball machines-per surge protector?
No strip-style suppressor will protect against lightning. I think you might need a whole-house type suppressor, or you just have to be good about unplugging your electronics during a lightning storm.
The strip-style suppressors (as well as the personal UPS devices) will do okay to protect against normal power surges as a result of, say, a blackout/brownout or if your main trips.
With server room power failures, if your main trips, best practice is to shut off all your breakers on the panel, turn the main back on, then bring on each breaker one at a time. It's probably not a concern for a private residence except maybe if you're having a pin party with 20 games and suddenly power goes out. Kill all your circuits before you flip your mains back on, or all 20 games firing up at once could cause a surge and stress or fry some electronics.