| >> I have never understood how it is still permitted to have a
| >> lampholder like in the OP:
| >> The way the lampholder is suspended depends on the grip of the
| >> actual screw-fittings on the bare wires!
| | >
| > It's not just relying on the wire being clamped. When assembled=20
| > correctly the wires are looped over strain relief hooks which
| > remove a lot of the pull force.
| At end of the day, with or without strain relief hooks, the weight of=20
| the lampshade is going to be carried at one point by only the two =
| multi-stranded mains wires and their respective insulation. =20
| The heavier gauge protective outer sheath of the flex is not used in =
| UK ceiling pendants I have seen.
| I don't know what the breaking strain is of those two little wires but =
| it can't be all that much.
We don't have 100 lb lampshades, those are chandeliers with
other means of support. As you correctly stated, you "don't know".
| ISTR that a UK ceiling flex is about 6A (0.75 mm^2 and perhaps made up =
| of 24 strands of 0.2mm diameter). For example:
| One link happens to show 3 cores but usually there will be only two=20
| cores holding a ceiling lampholder & shade.
| What is the breaking strain of those two cores alone without any outer =
About 100 lbs.
Is anyone able to test this and get a reading of the=20
| required force?
Yes, hang on it with one of these:=20
Why are you so concerned when there a several million in use?
What's black, charred and hangs from the ceiling?=20
An (Irish/Polish/Belgian/Chinese/Pakistani * ) electrician.
choose ethnic group to suit your locality and create raucous laughter.