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Discuss conservatory light in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

J

jimes

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a customer wants a light out in her conservatory/lean to, was thinking just put an rcd sw f/s to control light. old cu with mcb's but no rcd protection. whats the minium I have to do, bonding i guess and how about the fact theres no rcd?thanks
 
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S

sparkyork

hey up, i think if you fit an rcd for your work then youll be ok on that side of it. i have often wondered tho...say you come off a ring main at a scoket outlet and spur form this to RCD FCU then what about the cable thats coming from the ring main to the spur? if the box is a 25mm flsuh fitter then the cable supplying the spur will be less than 50mm and will need rcd protection?? if this is the case then you could change an mcb for an rcbo..

interesting to see other peeps views on this....

also check your main bonding before doing work, i beleive if its not there at all then you need to put this right before doing work and if its there but not the right size then im not sure if you got just right a not on the cert for this??
oh and you gotta use clear lamps instead of opal ones

peeps views on this?
 
hey up, i think if you fit an rcd for your work then youll be ok on that side of it. i have often wondered tho...say you come off a ring main at a scoket outlet and spur form this to RCD FCU then what about the cable thats coming from the ring main to the spur? if the box is a 25mm flsuh fitter then the cable supplying the spur will be less than 50mm and will need rcd protection?? if this is the case then you could change an mcb for an rcbo..

interesting to see other peeps views on this....
I would try and fit the RCD FCU next to a convenient socket, so that all the cable that you install from then on will be protected, job done. But it will probably be easier just to swap the MCB for an RCBO.

a customer wants a light out in her conservatory/lean to, was thinking just put an rcd sw f/s to control light. old cu with mcb's but no rcd protection. whats the minium I have to do, bonding i guess and how about the fact theres no rcd?thanks
If you have to conceal cables in the wall at less than 50mm you will need to provide additional protection with an RCD/RCBO. Hope this helps
 
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S

sparkyork

yeah but is this cable supplying the spur technically less than 50mm deep? i personally dont see anything wrong with spurring off and rcdeeing it just curious as to how far it goes!!
 
yeah but is this cable supplying the spur technically less than 50mm deep? i personally dont see anything wrong with spurring off and rcdeeing it just curious as to how far it goes!!

If you can get the RCD right next to the socket supplying it then you don,t have a problem but if you can't then technically the cable supplying it should be RCD protected, as in which case I suppose you have to forget the RCD and go for an RCBO and........ now I'm just going round in circles :)
 
C

clinger

  • Thread Starter Thread Starter
  • #6
See if you can drill straight thro wall and put a RCD FS the other side, the cable between the two will then be RCD protected as you'd have to drill thro RCD to drill into wire. Seriously though, the regs are for guidance and sometimes we must be sensible, if possible wack a RCBO in but this may not be poss as some CU's can't take them, next see if it is possible to add an enclosure next to the CU with an RCD in it and connect it at the start of the ring, if all else fails you'll have to put a RCD FS in. Don't forget to check bonding first!
 
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