| >> I have never understood how it is still permitted to have a | >> lampholder like in the OP: | >>
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| >> The way the lampholder is suspended depends on the grip of the | >> actual screw-fittings on the bare wires! | >>
|=20 |=20 | On 10 Dec 2006, Clive Mitchell wrote: | >
| > 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. | >
|=20 |=20 | 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 = copper=20 | multi-stranded mains wires and their respective insulation. =20
Yes. |=20 | The heavier gauge protective outer sheath of the flex is not used in = the=20 | UK ceiling pendants I have seen. |=20 | 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".
|=20 | 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: |
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|=20 | One link happens to show 3 cores but usually there will be only two=20 | cores holding a ceiling lampholder & shade. |=20 | What is the breaking strain of those two cores alone without any outer =
| sheathing?=20
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
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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.