On Friday, June 29, 2018 at 8:14:08 AM UTC-4, Denny wrote:
replying to jw, Denny wrote:
I'm installing a safety interlock switch on a Taylor and Dunn work cart, as of
now it's working backwards, you sit down and it won't run, any ideas, my
brains are like marshmallow at this point

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It sounds like you have the wrong kind of switch or are using the wrong
pair of contacts on the switch. It needs a Normally Open (NO) and you
have a Normally Closed or vice versa. Some switches have three terminals
and offer both.