A bit of bondage!
- Thread starter dingbat
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Of course, like my dad always told me: "son always cross bond yer cutlery"
I suppose Mr Cockburn would have us actually do that?
Yup.
And the fillings in your teeth - you never know when you might accidentally start chewing a cable.
Well, strictly speaking he doesn't, but you might.
And the fillings in your teeth - you never know when you might accidentally start chewing a cable.
Well, strictly speaking he doesn't, but you might.
Yes but cables are something that is very difficult for the human teeth to get a firm grip of
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Firstly Sparticus - the RCD trips within 0.04 of a second.
Second - perhaps all of this will become clear when you look at the second method of combating high loop impedance. 413-02-04 (ii) of the 16th Edition - "protection shall be provided by means of a residual circuit device".
All that has happened is that somebody has simply rediscovered but unfortunately misinterpreted, the technical reasoning behind the convention of using an RCD (or voltage operated trip) as a main switch in a TT system.
Second - perhaps all of this will become clear when you look at the second method of combating high loop impedance. 413-02-04 (ii) of the 16th Edition - "protection shall be provided by means of a residual circuit device".
All that has happened is that somebody has simply rediscovered but unfortunately misinterpreted, the technical reasoning behind the convention of using an RCD (or voltage operated trip) as a main switch in a TT system.
Are you thick or something?
We are now on the 17th Edition and the time of Amendment 1
A 30mA RCD is designed to disconnect within 0.04 seconds at 150mA
Will it always disconnect?
What about an RCBO?
How do you know what current the child will "draw" when connected?
0.04 seconds (40 mS) will allow 2 cycles of AC. Is that safe?
As far as I know a residual circuit is left over cable not a device. Please explain?
You are correct, that person is you.
PLEASE STOP TALKING ABOUT THE 16th EDITION. WE ARE IN 2011.
Sparkticus if you please. That's the official spelling on my birth certificate.
You're partially correct.
Somebody has indeed unfortunately misinterpreted some technical regulations.
Definitely not guaranteed to be safe. Indeed, in the worst of circumstances, it could be lethal. Another of those 'misconceptions' about RCDs making people electrocution-proof!
Kind Regards, John.
P
Paul_C
Indeed, as I've stated on this forum more than once in the past, it seems that by way of misleading advertising, the RCD has been elevated in the eyes of some laymen to the status of being the panacea for all known electrical ills, which it simply is not. I find it somewhat alarming that the trend seems to be toward using the presence of an RCD to be excuse for allowing standards in other areas to be dropped significantly (as in, for example, the new regulation permitting supplementary bonding to be omitted).
Totally agreed. As for your example, as you will have seen, despite the flak and/or ridicule it generates everytime I mention it (sometimes with comparisons between me and the main protagonsit of this thread!), I'm a great believer in having electrical continuity between any metallic parts that can be simultaneously touched, regardless of what the regs may say. If I'm confident that continuity exists because of, say, metallic pipework which I know is always going to be there, then I'm happy with that. If not, out comes the G/Y cable!
Kind Regards, John.
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