With the machine turned off but still on at the wall you have 240V inside.. be very very careful. The Jones plugs will be " hot".. you should NEVER touch these unless the game is unplugged.
Relays you are OK with.. will give you a tingle and wake you up... good thing about AC is that you WILL feel it and instantly pull away... DC not so lucky, it doesn't sit on the outside of the skin... has the potential to still kill you but you wont feel it
