Friday March 29, 2024

Repairing an Electrical Plug With Ground Pin Cut Off

Testing the New Plug
We'll use the same voltage reference points for the new plug as we did for the old plug.

First up, the 43v at the coin door..

Coin Door Voltage (After)
Picture: Coin Door Voltage (with new plug)


Wow!  Measuring slighly over 0.6v A/C at its highest now.  This was measuring 43v with the old non-grounded plug.  That's quite a difference!

Side Rail Voltage (After)
Picture: Side Rail Voltage (after new plug)


Okay, so the side rail voltage didn't change much.  Just over 1v A/C and not really any big deal.  I actually think this measured 43v with the lockdown bar inserted and non-grounded plug, but I would need to test that on another machine that has its ground cut off now that this one is fixed.

Plunger Voltage (After)
Picture: Plunger Voltage (after new plug)

The voltage at the plunger did change slightly.  It was near 1v A/C and now measures 0.246v A/C.

Conclusion
Looks like changing the plug over to a new grounded plug worked!  Shouldn't be getting any more shocks from this machine when touching the metal on it.  I know this was a longer tutorial for something somewhat simple, but there are a lot of people that do not realize the importance of a ground plug.  This is applicable to any appliance or device that uses electricity.  The grounds are there for your safety and unexpected shocks or behavior of the device can occur if the excess current has no ground path to follow.


Other References

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/hsehld.html
http://www.epanorama.net/documents/groundloop/why_grounding.html
http://hypertextbook.com/facts/2000/JackHsu.shtml

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