[jimmcintosh]

I am adding some new under cabinet lighting and wiring it into an existing single pole light switch and wall outlet. Ahead of this is a GFCI outlet. Whenever I add the wiring, it trips the GFCI outlet. Can someone tell me what I am doing incorrect please?

 

[joed]

If you give us some idea of what you did maybe we can help. We can't see it from here.
Tell us about all the wires in the switch box and how you hooked up your new fixtures.

 

[jimmcintosh]

OK. There is an existing GFCI outlet to the left of where I am wiring into. I am adding new wiring into the next single pole switch and wall outlet. I have tried to simply add the wiring into the top of the outlet, and when I do this, it trips the GFCI. Before I added the new wiring, the light switch and outlet both worked.

 

[Jim Port]

Hardwired lighting cannot be on the small appliance branch circuits serving the counter top receptacle s.