The "convenience" receptacles I've usually seen inside these lamp posts consists of a pigtail molded rubber NEMA 5-15 connector (similar to a pigtail lampholder but with holes for a standard plug instead of a thread for a bulb). I can't see clearly but it looks like that's what he's plugged his extension into. Look at that little yellow dot at the bottom of the wiring chamber cover (in the base).

They look similar to the female cord-caps used for making extension cords (yellow cylinders) but instead of attaching the device directly to the cord using screw terminals, you splice three wires (black, white & green) into the existing supply.

Don't know who makes them and why this is done that way -- it seems sort of prone to damage in my opinion. I've never gotten close enough to poke my hand in the base of a lamp post (a lot of them have the lid to the wiring chamber popped off).....and after some of the hair-raising stories I've read here, I never will! [Linked Image]

[This message has been edited by SvenNYC (edited 11-11-2003).]