norman Posted January 30, 2013 Share Posted January 30, 2013 Both have the ability to go bang Nothing is foolproof to a sufficiently talented fool. Link to comment Share on other sites More sharing options...
Paul. Giles Posted January 30, 2013 Share Posted January 30, 2013 Its a 3A circuit, nothing wrong with coming off of lighting circuit. Dont like using its own MCB. If the lights go off they get turned back on straight away, the same might not be said about when its on its own MCB. Link to comment Share on other sites More sharing options...
Rulland Posted January 30, 2013 Share Posted January 30, 2013 Imho the clues in the description, 'Lighting circuit', not 'lighting circuit but with extras bolted on to it', the ring final circuits are much less susceptible to tripping than the lighting. What happens in X time when the DIYer decides that the alarm is no longer required and chucks something else on that spur-meatier,bigger fuse, or even adds extra off that spur as well as the alarm. Usually I find the only time the lighting circuit is used is because it's easier than tapping into a ring, especially if the end stations on the 1st floor somewhere, the lighting rad is fairly inacessible on the ground floor normally. Link to comment Share on other sites More sharing options...
Paul. Giles Posted January 30, 2013 Share Posted January 30, 2013 Well that's where everyone is wrong. Its not a "lighting circuit" its a 6A circuit. The 6A circuit also has extractor fans and sometimes showers connected to it (not the 6-10mm type before anyone kicks off!) The circuit and associated cabling is designed to meet the requirements. As for "anyone can chuck something on that spur" It should be security sealed and there is also nothing stopping anyone "chucking" anything else onto other circuits. Link to comment Share on other sites More sharing options...
Rulland Posted January 30, 2013 Share Posted January 30, 2013 Marked in the consumer unit 'lighting'!. Extract fans have over run and come on with the 'lighting'. I've also yet to see a power shower fed of the 'lighting'. Just think it's ruff-again, my personal pov,lighting is lighting,rfc is power. Link to comment Share on other sites More sharing options...
sixwheeledbeast Posted January 30, 2013 Share Posted January 30, 2013 agreed but rfi is not related to emi. RFI EMI MFI HMV whatever.. I meant "interference". IIRC you get a 10Mhz hum from flou tubes, so both RFI and EMI. Link to comment Share on other sites More sharing options...
MrHappy Posted January 31, 2013 Share Posted January 31, 2013 Just think it's ruff-again, my personal pov,lighting is lighting,rfc is power.there is no requirement for separate lighting & ring circuits for power, only a traditional habit, Mr Veritas God Link to comment Share on other sites More sharing options...
Paul. Giles Posted January 31, 2013 Share Posted January 31, 2013 Marked in the consumer unit 'lighting'!. Extract fans have over run and come on with the 'lighting'. I've also yet to see a power shower fed of the 'lighting'. Just think it's ruff-again, my personal pov,lighting is lighting,rfc is power. Marked by who!? Well an extractor fan is not a light? Showers that have a very small motor (5A fused supply) but fed with hot and cold water so its just a small pump motor. The markings mean nothing on a dist board, they are put there by the installer (or in some cases nothing is labelled!) I am an electrician so i do know what i am talking about. Its not Rough its all about the correct rating for the circuits that are fed from that MCB. Link to comment Share on other sites More sharing options...
Oxo Posted January 31, 2013 Share Posted January 31, 2013 Who fits a shower pump to a lighting circuit FFS? And I do know the difference froma pump and a shower. Before a certain shower stick their noses in. Link to comment Share on other sites More sharing options...
Paul. Giles Posted January 31, 2013 Share Posted January 31, 2013 Seen it many times. Shower pumps all vary, i was referring to the 300-400W types. As long as the circuit can support it then its no problem!? People get too hung up on "its just a lighting circuit". They think nothing of installing 500W halogens around the property yet wont add a 300W pump to it? Strange. As before, its a 6A circuit that just happens to have lights on it. Link to comment Share on other sites More sharing options...
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