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- Thread starter Robgers
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Securespark, I noted your advice last night and that's the first thing I intend to do.
I think you were right the first time.EDIT: Sorry, that should have been "on", not "off"...
I don't think so. For a start, AIUI, it was already off. Furthermore, if it had been on and one switched it off, it would be off, so there would be no need to 'allow it to settle down to see if it goes off'!I think you were right the first time.EDIT: Sorry, that should have been "on", not "off"...
What securespark suggested (after his correction) is what I'd do - and, IME, it very often cures the 'stuck on' PIRs (presumably some glitch in the supply, or some other 'triggering influence', occasionally switches them into their 'always on' mode). The important part is to switch it off and then switch it back on - and, as I said, AIUI, it was already off, leaving only the 'switching back on' to be done.
Kind Regards, John
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Isn't it (still) permanently ON?
To clear up any confusion the MCB supplying the light was switched off overnight. Switched it back on today, light came on then turned off after it's usual time. As John suggested maybe just a glitch.
Thanks to all who contributed.
Thanks to all who contributed.
Ah, my mistake. Very good.
I was under the impression that the limit depended on the type of lampholder. IIRC it 16A for BC and ES, 6A for SBC and SES and unspecified for other types of lampholder.
It's a "feature".
People wanted to have the option of leaving the light permanently on but didn't want to have the extra wiring/switches to do this in the conventional way (by having a switch bypass the PIR). So PIR vendors added a "feature" that if the power was rapidly switched off and back on the PIR would go into an "always on" mode
The problem is as that sometimes the lights end up in this mode by accident due to a brief dip in the mains supply. This is both annoying and wasteful. It can also be very confusing if you aren't aware of it.
In any case I would still strongly advise installation of a switched fused connection unit both so the unit is better protected against faults and to provide a point of isolation that does not require isolating the entire circuit.
As I said to Lectrician, I haven't noticed any such 'limits' in the current regs. However, if what you say above is (or was) correct, the people who invented that rule obviously didn't subscribe to the view so often seen expressed here (sometimes even in bold or large font!), that "OPDs are there to protect the cable, not what it's connected to"
Kind Regards, John
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