Quoted from tilted81:Even if it’s a 20 amp circuit, often times 15 amp plugs are used so the answer is still no..
The only difference between a 15A and 20A socket is the 20A socket has a horizontal slot to accept a High Power device with a 20A plug. Also keep in mind that the pinball machine cord itself that you are plugging into your 15A electrical socket is only rated for a maximum of 9.5A and would fail long before the electrical outlet or internal home wiring.
Quoted from Jimmyhonda:Hello, is it safe to use 5 pins and 5 subs plugged into one wall outlet?
If you are using some type of power strip/extension cord to connect everything to a single wall plug then the answer is MAYBE!. Most power strips use 15A wiring and a 15 amp breaker which make them safe to use. If this isn't what you are using then the potential fire will happen between the wall outlet and power strip.
If you mean one circuit, as long as your home wiring is up to code and you aren't tripping your circuit breaker then its safe. I personally try to avoid connecting more than 5 Pins on any one circuit.