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There is just one red cable strand wire on the fan side and one identical red cable strand wire on the limit side. I hooked it up just like the Honeywell limit switch I removed but can't tell if it has a copper jump or not? The directions say to remove it IF it is a low voltage circuit. Once it is removed of course I can't replace it.
The copper jumper is a thick wire in the center at the bottom that joins the 2 bottom terminals. Accoring to what I have seen on th NUGK there are 2 wires on the fan side and 2 wires on the limit side. Here is part 2 of the 2 manual set for the NUGK....