rcd

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  1. M

    3 phase RCD question

    Hi everyone, each leakage question here. I am needing to run some LED screens, professional type, not TVs. These are 500mm x 500mm panels and traditionally have 2/3mA leakage per panel. So we generally have a 63A three phase distro with a 300 mA on input and multiple outputs protected by 30 mA...
  2. HappyHippyDad

    Difference between 1p+N and double pole RCD

    I need to replace a Hagar RCD (model number CN284U). This is a type AC RCD and I wish to replace it with a type A. The model number for the Type A equivalent is CNA584U. They are both 100mA, 100A, S type. The only difference being is that the Type A RCD is referred to as 1P + N rather than...
  3. B

    Whirlpool bath. Is there legal requirement for additional dedicated RCD even if we have Double RCD CU?

    Hi to all. Is there legal requirement for additional dedicated RCD even if we have Double RCD CU? Our whirlpool bath has ambiguous instructions: first it saying that it has to have separate RCD outside. Then it says "IF separate RCD installed" like if there as an option not installing it. We...
  4. Pretty Mouth

    Unusual RCD fused spur

    A recent EICR turned up a fault: an RCD fused spur was feeding a socket and a shower pump, and neither socket or pump had continuity on the CPC. The circuit was also showing low IR between live conductors and earth (0.09 Mohms). I came to do the remedial work and found the reason for the...
  5. I

    Adding RCD protection to obsolete MCBs

    Best way to add RCD protection to specific circuits in an old Siemens DB which I’m told is now obsolete. Install an additional enclosure adjacent to the DB to hold new RCBOs and feed these from the obsolete MCBs? Any other ideas?
  6. A

    Complex Boiler/Light RCD trip issue

    Hi, I’d really appreciate some advice or suggestions as to what could be causing an ongoing issue I have with my RCD tripping. My RCD trips when I turn my bathroom light off when the boiler is on. It’s worth noting it’s not exactly every time and sometimes when the light has been left on for a...
  7. R

    Will this fuse board require work prior to EICR?

    I was just about to book an EICR inspection for my property when the decorator said he didn't think the fuse board would pass. He said there was no RCD on the top board and partial on the bottom one. So rather than pay twice I was thinking of getting any potential work done first prior to the...
  8. wawyed

    Solar Solar system - Hybrid inverter in a shared RCD

    Greetings, I have a solar 5kw system installed with a hybrid inverter (no batteries yet). My electrician decided to add an extension board for the solar installation as my main CU couldn't fit all the required switch due to lack of space. I have dual rcd consumer unit with no high integrity so...
  9. P

    EICR fail: No RCD Protection for lights etc.

    I am a landlord and my managing estate agent just recently organised an electrician to carry out EICR. Came back as unsatisfactory, no RCD protection on: lights, smoke alarm, door bell and immersion heater. There is RCD protection on sockets and cooker. Electrician suggests changing the...
  10. Rockingit

    Suggestions for better RCD discrimination

    Have an existing old client with what's best described as a sprawling small-holding of a property. There's an armoured external supply which branches into a submain for various sheds/workshops/stables (some of which are 150-200m) etc all of which have standard RCD final circuit protection and...
  11. L

    RCD fused spur units . Which ??/

    Have not needed one for some time ! Now need to add one in on a small job. Any stand out as been good value etc ?
  12. OnlQQker

    So, I Took Alice Out For Her Afternoon Walk And An Rcd...

    Conversation developed with a middle aged lady who has recently lost her husband. Note to self, stop walking dog around the graveyard Anyway this lady who I find extremely polite and respectful, said to me her electrics started tripping out early Saturday morning @5:00am To cut a long story...
  13. G

    RCD type- A or B to supply single phase UPS

    Been looking at what type RCD should be fitted for small single phase individual UPS. Looked at Hager rcd selection guide under type B has 3 phase UPS but nothing for single phase . https://hager.com/uk/support/regulations-18th-edition/selection-of-rcd-types I am hoping type A will do ...
  14. G

    Can I use a mcb as main switch? And also RCD protection? Read

    So as the title says can I use a mcb as the main switch. Basically to keep it short I’ve took a 25mm sub main to power an outbuilding. Mains coming in will be Henley blocked and new tails will go into enclosure with b63a mcb which then feeds 25mm swa to outhouse which contains its own c/u which...
  15. P

    Failed RCD socket given post-mortem out of curiosity

    Many years ago I fitted some RCD socket outlets to my parents home for the two likely to be used outside, the front hall and the kitchen one next to the window. Being the paranoid sort of person I am I always test-trip them when I have cause to use one, and in the case of the front hall that is...
  16. Fazz711

    Hw many computers for no RCD

    We have to put two new tower sockets in to a office at work. At the moment we have two towers but four sets of four desks. The two sets of four without towers are fed via extension leads hence the need for two new towers. I have been told by our tech guy we aren't fitting RCBO on the two new...
  17. newfutile

    NICEIC Certification Scheme Rcd’s in series in communal area

    During an eicr i have discovered a 30 ma (RCD) Residual Current Device feeding a dual RCD consumer unit. The source rcd trips before either in the Consumer Unit . i would remove the source rcd or replace with a type s but i cant be certain about buried cables in walls, at least some of it is in...
  18. K

    UK Old 8.5K shower wired to 30 amp fuse with no RCD. Is it still safe & ok to use?

    8.5K shower unit is wired to plastic box consumer unit to 30 amp cartridge fuse with no RCD It’s the original shower installed when the house was built around 1995 The shower is still fully working after all these years, never blowing the cartridge fuse before Am I right to presume RCD wasn’t...
  19. E

    Three phase rcd protection

    Hi guys, I am rewiring a commercial launderette with 3 phase machinery. Does the machinery need to be RCD protected being in commando sockets. The sockets are not accessible to the public and each circuit is being used for a specific machine. With the price of three phase rcbos the...
  20. T

    Up front RCD tripping with sub main connected.

    Hello all I have recently installed a sub main in 4mm 3-core SWA, approx length 45 metres, to feed a small garden office. Final circuits in the cabin are protected by 30mA RCBOs and the supply is fed from a 32A MCB on the non-RCD side of the DB in the house. As the installation is TT I put in...
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