rfc

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  1. P

    Two RFC merged in to one?

    Helping out a friend and a CU change is really the best option as sockets in kitchen and downstairs room not on RCD protection. Now one of the WTF moments is it appears (not fully checked yet) that one small room with 2, maybe 3 sockets at most, has a separate RFC from the kitchen. In turn other...
  2. P

    Ring Final Circuit (RFC) versus Radial. Yes, again.

    This is a topic that comes up a lot and seems to attract near-religious levels of fever in how folks argue over the choice of circuit for UK sockets. However, often the arguments are ill-informed or they veer off in to pointless corners, or sometimes get personal. This is my attempt to put a lot...
  3. Rockingit

    3a FSU downstream of a spur socket from RFC - compliant?

    Have a 3a FSU that feeds an adjacent WC light and fan, wired from a socket that is a spur. Even though we all know that it's safe (no different to having a 3a plug top in the socket), can't quite make up my mind if it's compliant or not. Thoughts?
  4. T

    Radial or RFC for Summer house

    Hi. I will soon be wiring up my summer house. My plan is to run 10mm2 SWA from spare 50A breaker on my house consumer unit (approx 20m) to a 40A garage consumer unit with 6A MCB for 1.5mm2 lighting circuit and 32A for 2.5mm2 RFC. I plan to have 5 double sockets which will have heater, TV and...
  5. B

    Fault find RFC, next socket

    Hi all, Hope you all had a nice Christmas! I'm a college student, (I worked in an office, but I wanted a change so at 30, decided it was time to do something else). I can't ask my lecturer as it's the holidays, but my brain can't figure this out so hopefully someone on here can help me...
  6. timhoward

    20 amp RFC, ok or not?!

    We ran into this question on another thread. A couple of people I respect a lot have suggested it's ok. I'd always believed it wasn't ok. I'm sure it's actually safe, but does the letter of the regs allow it? That's the only reg I know of for an RFC too. It does actually specifically say...
  7. P

    Low IR test readings on lighting and RFC.

    Hi,guys went to do an EICR and when doing IR test I got L-E ON RFC like 0.02 MOHM and two lighting circuits L-E AND L-N the results were like 0,14 and 0,15 MOHM.It is old wiring where all the cables live and neutrals are black put in the walls in steel conduit.My question is is it possible that...
  8. Dartlec

    Schedule of circuits - Lighting FCU on RFC

    On a couple of recent EICRs I've run into FCUs on a RFC, then 1.5 or 1mm to several lighting points and would be interested how people would note this on the schedule? On the most recent one there are 6 outside lanterns fed from an FCU on the socket circuit, with max R1+R2 outside of 4.5Ohm...
  9. B

    RFC and Radials for Computers

    Hi, I have a couple of questions regarding RFC and Radial circuits. Regarding the radial circuits. I have been reading a few post lately regarding the use of a 16amp MCB radial in 2.5mm T&E that when installed on a 16amp MCB that there should be only one socket connected to the circuit. Is...
  10. J

    3 x RFC all with no continuity

    Working on an empty property which has 4 RFCs. 3 of these are showing no continuity across R1 R2 and Rn. The wiring is around 30 years old and each room has 2/3 single sockets. Each of these sockets is fed by a single 2.5mm T&E. What's going on here? Is it likely the sockets are being fed from a...
  11. P

    Incomplete ring circuits?

    The recent click-bait thread on radial vs ring final circuit descended in to the usual arguments ranging from sane to near-religious, but one issue that was raised among the general noise is the risk of a ring with an open somewhere. So I wondered if the folk on here that do many EICR and...
  12. B

    Trainee Question RFC circuit ??

    Hi new to this site. I am a trainee electrician and have been trying to get some info on ring final circuits. My parents have had there kitchen done, well new worktop and doors all spray painted. They have installed a new larder unit and they are looking to plug in micro/oven/grill in the...
  13. Zdb

    Maximum kW fixed load on RFC

    So if 2kW is the maximum fixed load for a 2.5mm RFC. What would you say the maximum fixed load on a 4mm RFC should be? If different.
  14. Spoon

    Extend RFC to a detached building/garage/shed?

    You brainy guys may be able to help with this thought I was having. There has been a thread recently about 4mm radial from ring main. This got me thinking..... (No funny comments) So my question is: If you had a building/garage/shed, say about 5 meters away from a house, is it acceptable to...
  15. diced carrots

    L-E reversed and low voltage on RFC

    Trainee here so it's likely I've got my wires crossed! I've got a small unoccupied rental property which had a rewirable fuseboard which my work colleague (fully qualified spark) and I replaced the other day with an 8 way RCBO board, surge protected. He did the board change while I replaced...
  16. S

    Damaged RFC advice

    I have just wired a converted toilet, did my first fix last week, went back today to do 2nd fix. When the plasterer has been in and boarded the room, a screw I assume, has hit the wiring. The extended ring went from a double socket to a 5A FCU for the lights and a 13A FCU for the electric...
  17. T

    Need to extend a RFC - Zs not good enough

    Just after some thoughts on this. I need to extend a RFC, but the Zs isn't good enough to comply (it doesn't comply currently, but it becomes my problem when I touch it). It's currently about 0.70 ohms - what I need to extend it by will be minimal, maybe taking it up to 0.75 ohms. It's protected...
  18. W

    Would you extend this RFC?

    This is my first post so please be gentle! I've been asked to extend an RFC into an extension at the back of an 8 year old property. It is a TN-C-S supply with 2 RFC's, one for the Kitchen and one for the rest of the house. I've done some testing on the main house RFC as follows: r1=0.84 rn=0.84...
  19. gazdkw82

    RFC cross connect formula

    I may have asked this question before but I forgot what was said and the problem has reered it's ugly head again. I was doing some RFC testing the other day. Did my cross connecting but when I was doing the calcs I kept getting the wrong figure. It seemed I was not pressing = before dividing by...
  20. G

    Electrician Jobs Rfc for a newby confirmation please guys

    Hi guys still studying hoping to take exams this year at aged 54 Question is when doing continuity of rfc to confirm if a ring is complete . Is they a table/chart for maximum ohms readings allowed etc I understand how to do the test etc and figure of 8 so hopefully just some confirmation. Tia guys

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