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Topic Title: ZS Testing/explained
Topic Summary: Ceiling Rose
Created On: 09 February 2011 09:04 PM
Status: Post and Reply
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 11 February 2011 09:51 AM
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daveparry1

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No problem with a ceiling rose Dick but some fancy chandeliers and multiple light fittings are a pain to remove, especially when the wires become disconnected when you move them, also most are too heavy to be left hanging on the wires whilst tests are being made. I tend to leave those alone and find somewhere else to do a test!
 11 February 2011 07:37 PM
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dickllewellyn

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Originally posted by: daveparry1

No problem with a ceiling rose Dick but some fancy chandeliers and multiple light fittings are a pain to remove, especially when the wires become disconnected when you move them, also most are too heavy to be left hanging on the wires whilst tests are being made. I tend to leave those alone and find somewhere else to do a test!


Agreed. But the OP states it is a ceiling rose!

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Richard (Dick)

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 11 February 2011 07:39 PM
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dickllewellyn

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Also, many fancy chandeliers or light fittings will have easy access to metalic parts which are likely connected to CPC.

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Richard (Dick)

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 11 February 2011 07:49 PM
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daveparry1

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That would be handy for an R2 test with a long lead but not much good for a loop test!
 12 February 2011 07:50 AM
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dickllewellyn

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Originally posted by: daveparry1

That would be handy for an R2 test with a long lead but not much good for a loop test!


Why not? I've lost count of the number of fittings I've tested using the chassis for an earth connection, and simply popping a lamp out to access a Line connection. If there's concern over putting probes into lamp holders, KewTech (and I'm fairly sure others) manufacture test lead adapters for GU10, E14, E27, B22, B15 lamps. If you've got a fitting which uses something different, chances are it's ELV and double insulated, old and obscure (un-earthed), or a justified limitation.

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Richard (Dick)

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IET » Wiring and the regulations » ZS Testing/explained

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