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EXTERIOR LIGHTING EQUIPMENT
TOP CONNECTING BOXES FOR EXTERIOR LANTENRS
(British Patent No. 427835)



Z 0011 Type "D" Top Connecting Box.

Z 0001 Shackle Adaptor.

Z 0013/14 Type "D" Top Connecting Box.
G.E.C. "Type D"
Top Connecting Boxes.

These connecting boxes, which are now standard with the G.E.C. pendant lanterns shown in this list, fulfil the following requirements, as can be seem from the diagrams :-

(a) The lantern is held rigid, an essential with directive units.
(b) The box forms a convenient terminal box for the connection of cables.
(c) The possibiltiy of lamp failures due to the entry of water between the bracket and the lantern is eliminated.
(d) The possibility of lamp failures due to condensation in the bracket arm or in conduit tubing with consequent water-drop is eliminated.
(e) Stock lanterns can be readily adapted for non-standard fittings (¾ in. to 1½ in.)
(f) Wiring and erection are simplified.


The box is constructed of malleable cast iron. The two cast brass terminal blocks are mounted on a moulded bakelite base which has a dividing fillet, this unit being attached to the back of the cast iron box by two brass screws, a micanite disc providing a high degree of insultation from the iron body.

The flexible conductors from the lampholder are looped through and soldered on to the terminal blocks. The lead from the shell of the holder is distinguished by the letter "N" stamped on the bakelite, and this lead should be connected to the neutral cable. The lid of the box is rendered watertight by a wide rubber washer. A visible earthing screw is provided.

G.E.C. "Type D" connecting boxes are available for rigid suspension on eitehr bracket arms from ¾-in. gas to 1½-in. gas, span wire clamps, raising and lowering gear, or pipe clamps from tramway pole bracket arms.

The boxes can also be supplied for shackle fixing for lanterns having a symmetric light distribution. Directional lanterns must, of course, be rigidly fixed.

Adaptors and Lock Nuts
Z 0001Shackle AdaptorFemale
Z 0002½" GasFemale
Z 0003&frac32;" GasFemale
Z 00041" GasFemale
Z 00051¼" GasFemale
Z 00061½" GasFemale
Z 0007¾" E.T.Female
Z 00081"Female

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