Shock from unplugged sewing machine lead

[sewing]

Two of us have had a shock from a lead that had been disconnected from a Singer sewing machine several hours earlier.
The machine is fairly new and not been heavily used.
The shock was definitely stronger than just static.

My concern particularly is that this is a machine being used with children.

Can someone tell me what is wrong with the lead or is this a normal residual charge for an appliance of this kind?
Thanks in advance for any advice.

 

[ruston]

They often have a bespoke connector rather than a standard IEC type.

I agree , but anything can happen...
Edit. I just used that as an example of an insulated connector.

 

[sewing]

Yes, it is a bespoke connector for the Singer machine but looks something like the one illustrated.
No, the power was not connected at all and had not been so for some hours.
And also I would agree that getting a shock from an insulated connector seems strange to me but we sure felt it on two separate occasions!
Appreciate the conversation, Thanks

 

[ipf]

Attaching a photo may well show more clearly what you are trying to explain.

 

[Lucien Nunes]

I think we're up to speed with the configuration, which is pretty normal for sewing machines. There is a cordset comprising the 13A plug, foot-pedal speed control and a custom connector to fit the sewing machine inlet. When the cordset is completely disconnected from both the machine and the mains, it is possible to get a shock from the female connector, due to charge stored in the speed control pedal. The only thing that is not clear is how the OP is touching the contacts of the connector.

Please could we have a pic of the connector showing, if possible, where you touched it to receive the shock. There have been cases of conductive plastic having been used in moulded electrical products, but not from reputable manufacturers.

 

[ipf]

I think we're up to speed with the configuration, which is pretty normal for sewing machines. There is a cordset comprising the 13A plug, foot-pedal speed control and a custom connector to fit the sewing machine inlet. When the cordset is completely disconnected from both the machine and the mains, it is possible to get a shock from the female connector, due to charge stored in the speed control pedal. The only thing that is not clear is how the OP is touching the contacts of the connector.

That's what I was hinting at. Not really interested in a photo of a sewing machine.

 

[sewing]

I'll upload a pic when back at work tomorrow Thanks

 

[Andy-1960]

Could it possibly be a counterfeit machine? The Chinese are knocking out some very good copies.