I am running power to a detached shop. I will be coming up an exterior wall with conduit and can't decide how to enter the box.

The box is flush mounted so I plan to punch a know out then drill out from the inside, but how should I connect the conduit to the box? Is there a fitting that I can terminate the conduit with on the inside of the box?

 

Depending on the type of conduit you will use a connector with a locknut on the inside of the panel.

 

That's what I thought, but I can't find a connector that is threaded on one side and glued on the other...Guess I will look again.

 

You are looking for a PVC male threaded adapter.

 

If my understanding is correct, you need to effect a vertical-to-horizontal transition which is done with an "LB" fitting for your circumstance.

An "LB" is used for "close" " 90 degree turns in runs of tubing and conduit.

 

For PVC they are called a terminal or male adapter.