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  1. spud1

    What if a circuits Max Zs is exceeded but the circuit is protected by an RCD?

    Just processing an EICR and noticed a couple of final circuits measured Zs values (fed from a sub distribution board) slightly exceed the Max permitted Zs values for the OCPDs that protect them. Obviously I will note this as a design flaw in the observations, but I just wondered, from the...
  2. Flanders

    63 amp 3 phase socket protected by a 30 amp fuse RCD?

    Carrying out and EICR on large factory and they have welding plug into 63 amp commando sockets but are protected by 30 amp BS 88 fuses. Now the regs states Socket outlets with a ratted current not exceeding 32 amp need RCD protection. 411.3.3 (i) Because the Socket it 63 amp I say it does...
  3. Soulcraft Electric

    Alterations to an installation with a 1980s (?) Wylex board protected by a single external RCD

    Just carried out a pre-work survey (older property and I wanted to check it over) for a client that wants a few extra sockets and other bits and bobs. The installation has a 5-way Wylex board (I’m guessing 1980s - white/cream plastic) which has had RCD protection added externally at some point -...
  4. M

    Fire alarms non rcd protected? 25 characters

    Hi guys Im curious as to how people wire in smoke and heat alarms in a domestic setting. I know you're allowed to put them with a regularly used lighting circuit or on their own circuit...but....does the circuit that has the alarms on need to be non rcd protected? Or is it a case of it...
  5. K

    new socket on no rcd protected house

    Hi all, A house has no rcd protection and im not able to change to an rcbo on the relevant circuit. A new CU is not an option. A new socket is required in one room where the only other power source is on an opposite wall therefore I see the best option is to chase the wall out where the new...
  6. Strima

    Internet Security, are you protected?

    Security is not a dirty word Blackadder... Vibrator manufacturing company 'collected users' data' | Daily Mail Online - http://www.dailymail.co.uk/sciencetech/article-5345659/Vibrator-manufacturing-company-collected-users-data.html I would have never thought hacking would be an issue for these...
  7. B

    10mm see protected by 60 switchfuse

    Hi, I'd planned to use 10mm see to supply an annex protected by a Wylex 60a switchfuse. Cable calls suggest that 10mm swa ref method d is good for 60a, even when using the 70deg tables. Instructions with the Wylex switchfuse state that termination are only good for 16 to 35mm cables...
  8. MerlinGremlin

    Do socket outlets in a Pub need to be RCD/RCBO protected!

    What are peoples thoughts on this, should socket outlets in the general public areas be RCD/RCBO protected? I believe they do and have put them down as a C2 on a recent EICR but recently got a phone call to say it's a C3!
  9. B

    EICR IR testing on whole installation with circuits protected by RCBOs

    EICR IR testing whole installation with circuits protected by RCBOs... Say it's a single phase consumer unit, plain main switch no RCCBs, all circuits protected by RCBOs, Is this method acceptable?.... L+N to earth only. Main switch off (safe isolation), all breakers on. Temp link...
  10. C

    schedule calculator apollo 500

    I'm using the inbuilt schedule calculator and get posed with the following options.# Enclosed or protected mains cabling exposed or unprotected mains cabling I guess enclosed means in conduit of some sort but I'm not sure about protected and unprotected mains cable seems a bit vague any ideas
  11. L

    Rcd or not

    Morning guys, Need some quick advise without having to look through the bible to find the answer. Installing a small 4 way unit into a domestic property to supply a new oven which requires 3 seperate supplies of 16amps. Does the new sub board im installing need to be rcd protected or not...
  12. K

    new user apprentice - batten holder/line conductor termination??

    Hi all, this is my first post on here. I have searched the web but cant find a straight forwards answer (or an answer at all) for this question which is part of my c&g course. - how is pvc insulation protected against high temperature in batten holder type fittings? and also - why do the...
  13. P

    Jacuzzi ... to 702 or not to 702 ...

    Recently been to a site with a 3month old hot tub install that had been done by another sparks, with the IP66 rotary isolator just 650mm from the edge of the Jacuzzi. It is possible to be partially immersed in the Jacuzzi and lean out to operate the isolator. Would you consider this acceptable...
  14. M

    GE RCD query

    Went to a property yesterday to do some odds and sods, replace the cu and do some remedials following a condition report customer obtained prior to purchasing the property. The cu is made by GE and was installed in 1997, half the board rcd protected and half not. One of the observations on the...
  15. T

    RCD Test on lighting circuit protected by RCBOs

    Hi everyone, still training so please bear with me. What is the correct way to carry out an RCD test on a lighting circuit protected by a BS61009 Type B RCBO? I've looked in the regs, OSG and all of my course material but still no actual definitive answer so thought I'd ask here. The reason...
  16. B

    Cable in narrow space - how to fix it?

    10mm 2+e must run in a 30mm wide gap under floor between wall and joist. Must also be >50mm from surface or enclosed in earthed metal or impenetrable armour. The distance is only 1m. It is not possible to reach 50mm down the gap to fix nail/screw in cable clips. Would any of the following...
  17. gazdkw82

    Garage Db2 To Db3

    So my neighbour caught me as I was bringing the bins in. "your a training electrician aint ya" oh feck ere we go haha anyway, story goes... He has a 10mm swa from his house cu to a garage in his back garden. Its terminated into a 2 way Volex consumer unit that has a socket radial circuit and a...
  18. P

    Spur and lighting cct off a FCU protected spur?

    I am looking to install power and light into what was a "coal house" that is going to be used to hold a small domestic chest freezer. The room itself is part of the fabric of the house, but is only accessible by an external door. The wiring run will be direct through the kitchen wall into the...
  19. B

    Air conditioning installation - supply options

    Hello, We are having 2 wall mounted split system air conditioners installed. These come supplied with a 13amp plug which will power both the internal and external units. I would like to wire these in for a more permanent and neat installation. Our consumer board only has a single "RCD...
  20. E

    Rcbo On A Busbar Protected By Rcb

    Hi just looking for your opinions on putting an RCBO on as busbar protected by an RCD, the reason i ask is the manufacturer doesnt make a 45A MCB but does make a 45A RCBO. or leave the circuit on a 40A MCB even though the manufacturer of the oven asks for a 45A supply?

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