OT - Fitting RCD in household mains supply

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"Andy Hall" wrote | Non-maintained small fluorescent lights are not very expensive, | although the fittings are pretty ugly. Undoubtedly this could be | improved if there were a consumer premises market for them.
Something like this:
http://www.tlc-direct.co.uk/Products/HS724LE.html
Smoke alarm, emergency light and Part L1 compliant.
Owain
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On Wed, 17 Dec 2003 01:07:44 -0000, "Owain"

Hmm. Interesting pair of products.
It would be good if one could have conventional lighting and switch in the fluorescent stuff when the power fails or the alarm goes off.
The technical design seems well thought out though
.andy
To email, substitute .nospam with .gl
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Andy Hall wrote:

Not a bad idea actually.
However I am against having to add two provisions to fix what Peter has probably identified is a non existent problem.

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Wonder if any these involve someone going downstairs to reset a trip or look for a torch.

Instead of losing one lamp you lose the entire circuit.

The only time it would be useful for a lighting circuit to fail in a fire is if it only feeds non-maintained battery powered lighting. Since here the effect of the loss of power is to turn the lights on.
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Often, the easiest way to add RCD protection to an existing installation (using DIN rail CU) is to replace socket circuit MCBs with single width RCBOs, if they are available. It isn't necessarily the cheapest way, although if there are only 1 or 2 circuits to be protected, it can still be cost effective. It is certainly the best way to do it, however many ways there are.
Christian.
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be
cheapest way is to replace the CU switch with an RCD switch but then we don't want the light going out
see separate thread for thaat ;)
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