surface mount sub-panel on exterior stucco, rear knockout use

[n8huntsman]

I want to feed my subpanel, by running #6 or #8 NM from the main, through the wall a few feet, to the back knockout of a surface mount exterior subpanel mounted on a stucco
wall. If I can't put the clamp screws inside the box, what type of strain relief do you use? I don't want to come out of the bottom into and LB if I don't have to, just to keep it clean. But I also don't want to worry about rain getting behind the panel and down inside it. Also thinking about the rough edge of the stucco abraiding against the wire. Solutions?

[n8huntsman]

The box is not yet mounted. I'm going to attempt to snake the wire through the wall so I will not have access inside the wall. I would use one of these: http://www.homedepot.com/p/Halex-1-i...110B/202241099
but I read that the clamp side has to be outside the box? If I put the clamp outside the box, I wont have access to tighten it.

Can these be engaged inside the sub-panel? http://www.homedepot.com/p/Halex-3-4...7516/202077089
Or do they have to lock the cable in place from outside the box too?

[Naptown]

Generally when doing an assembly like that the wire would be clamped to the box, the hole would be large enough to allow the connector to fit inside the wall and the box would be attached to the wall with either a sealant at the hole or flashing above.
Put the wire into the box and then feed into the wall and seal.

[n8huntsman]

Generally when doing an assembly like that the wire would be clamped to the box, the hole would be large enough to allow the connector to fit inside the wall and the box would be attached to the wall with either a sealant at the hole or flashing above.
Put the wire into the box and then feed into the wall and seal.

What about on the main panel side? Assuming I can fish the wire into the main panel, I'll have a similar issue on that side. I'm surprised there is no way to clamp from inside the panel.

[Naptown]

You will need to cut the drywall or expose the outside of the box on that side.

[inetdog]

What about on the main panel side? Assuming I can fish the wire into the main panel, I'll have a similar issue on that side. I'm surprised there is no way to clamp from inside the panel.

Just a warning that you probably do not need: Disconnect all power (and not just by opening the main breaker in the panel) before trying to fish wires into the main panel!