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paulsherwin · 26th Apr 2019, 3:14 pm

The standard Singer controller connector used until the mid 60s only has 3 connections - neutral, live (for the sewing light) and controlled live (for the motor). There is no provision for earthing the metalwork. I always use mine with a plug in 30mA RCD and take care not to be in contact with anything earthed.

26th Apr 2019, 3:14 pm	#9
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,947	Re: Vintage sewing machine suppressor help! The standard Singer controller connector used until the mid 60s only has 3 connections - neutral, live (for the sewing light) and controlled live (for the motor). There is no provision for earthing the metalwork. I always use mine with a plug in 30mA RCD and take care not to be in contact with anything earthed.