N-TBD: United Kingdom

2 3/4" X 4 3/8" (70mm X 112mm)

 

(cap top embossed)    T

                                    G.P.O.

                                  

                                  31

(inside cavity embossed) NPC

 

Picture courtesy Bob Berry

This is a pothead or dryspot style designed to allow protected wire connections under the screw cap.


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