If that Tag Team has a Gottlieb stock EMI filter and no isolation transformer, the "ground" (siderails, coin door, etc) will float at around 60-100V relative to any game or other metallic-cased appliance next to them. If someone puts a hand on both machines at the same time, they could easily be killed. It's a feeling that I've felt more than once... never at work as an electrician, but often at pinball venues. Enough times that now I'm very careful about touching two machines at the same time, since I don't know what condition the owner of a game has placed it in.Chris Silver wrote:It was a super wierd feeling. The building didn’t have a ground to be found anywhere. I had just put a plug on the end of the cord, went to the wall and shook my head. It was the first time to be powered up in a very long time.semicolin wrote:PUT IT BACK ON CHRISChris Silver wrote:I actually cut the ground off of a pinball machine.
Btw, it was a Tag Team Colin.
This is why Ontario Hydro made us all put in isolation transformers: at the time, ground wasn't always a common feature in every electrical installation, and every pinball manufacturer used these janky EMI filters that couple the incoming hot line to the game ground braid. Taking out an iso transformer (common practice these days, and not a good one) of an ungrounded game is extremely dangerous.