satsuma01 Posted April 6, 2009 Posted April 6, 2009 Do low enery bulbs cause mcb trips? (Or 12v lighting for that matter?) no low energy lamps (bulbs are found in the garden lamps are found in light fittings wont trip a mcb because they use gases inside like a flourescent light fitting tube, where as incandescent light fitting lamps has a metal filament across the lamps connection inside the globe glas part and again 12v lighting will not make a trip go if a lamp fails, the only time a mcb would trip is if there is a fault on the 240v side of the transformer or the cable itself. hope this helps. "If you carry your childhood with you, you never become old. Why rush to end life when happiness is in the blissfulness of childhood innocence.""We all die, the goal isn't to live forever, the goal is to create something that will." 07475071344
Rulland Posted April 6, 2009 Posted April 6, 2009 The idea of the 'ring' circuit is that as the name suggests it's a ring-if a wire come adrift on a 'radial' you will lose all sockets downstream of that loose wire-whereas on a ring all sockets will still be 'live'-albeit you have no 'ring' anymore. This is where as mentioned the testing on a ring circuit is more intensive-R1 + R2 etc etc-to tell you if the ring is a ring and the corresponding earth is true and good enough to 'trip' the relevent circuits under any fault conditions that may arise. It has been suggested that a radial circuit be wired in 4.0mm cable-whereas a ring is obviously 2x2.5mm cable. The 'split' RCD board is to minimize the dangers involved in circuits being disabled under fault conditions-ie upstairs lights and downstairs sockets on one RCD and downstairs lights and upstairs sockets on the other-it means you don't lose all lights or all sockets in one go-and thus is deemed to be safer for the user-won't fall down the stairs trying to get to the CU cos some lights will still be working-apparently-as Woosh though IMHO-load of bollox and red tape and more expense!. Richard.
luggsey Posted April 6, 2009 Posted April 6, 2009 There is a pile of c##p to be adhered to for the 17th edition a brief synopsos: ( I cant spell)Unless the wires are: 1 morew than 2" into the wall 2 in steel eatherd conduit The 16th allowed cables 'in zone' to be shallower then that, I didn't realise the 17th had changed it? (Haven't done 17th yet!!!) ----------------------------------------------------------------------------------------------------------------------------------- Life is like a box of chocolates, some bugger always gets the nice ones! My Amateur Radio Forum
mojo Posted April 7, 2009 Posted April 7, 2009 1 mm cable carry out 5 amp maximum 2.5 mm carry out 13 amp maximum to wire any sockets circuit in redial there isnt much load u can put on that example: Iron +Electric Heater THe breaker will trip. That where the Ring circuit came from to incresase the capacity of current within safe measures
Cubit Posted April 7, 2009 Posted April 7, 2009 1 mm cable carry out 5 amp maximum2.5 mm carry out 13 amp maximum to wire any sockets circuit in redial there isnt much load u can put on that example: Iron +Electric Heater THe breaker will trip. That where the Ring circuit came from to incresase the capacity of current within safe measures I see you are as expert in electrics as you are fire!!
SUBS Posted April 7, 2009 Posted April 7, 2009 1 mm cable carry out 5 amp maximum2.5 mm carry out 13 amp maximum to wire any sockets circuit in redial there isnt much load u can put on that example: Iron +Electric Heater THe breaker will trip. That where the Ring circuit came from to incresase the capacity of current within safe measures Eh ?
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