1. S

    SWA protection to car charger query

    Qualified electrician has installed Zappi car charger outside house. Grid incoming goes to DNO cutout then to SPD then to meter then to henley block then to RCCB then to SWA cable out wall and to charger mounted on outside wall (about 4m length SWA). I just learnt that RCCB gives no overcurrent...
  2. D

    Surge Protection Advice

    Let me say from the off that although I'm electrically competent I'll be getting a professional in to do the work. I just like to know the answers before I ask professionals questions! So I have a 100A single phase domestic supply feeding the house CUs as well as a CU for an EV charger. One of...
  3. B

    RCD protection in industrial setting circuits

    Hi All Hope someone can help In industrial setting are all circuits required to be RCD protected ? Or is it just socket circuits ? Thanks in advance
  4. A

    Lightning & Electrical Protection for Outdoor Aluminium Pergola

    Hi all, I am installing a custom sized (15ft X 17Ft) Aluminium pergola in my backyard on a concrete with tiles. The Aluminium pergola and kitchen are powered from one of the outlet from the house. Please note, the pergola has inbuilt lights and will be powered from one of the outlet from the...
  5. E

    Generator Protection and PSCC values

    I was asked to go and take a look at a generator set up by a marquee company yesterday to do some testing. It was a brand new JCB 65QS with 209hrs on it (58.7kva prime). The generator was fitted with a socket pack from the bus bar with 3 x 16a on 30ma RCBO, 1 x 32/3 on a C curve MCB and a 63/3...
  6. R

    Is a 300mA RCD protection against direct contact (Portugal)?

    Hi friendly people, As you may be aware, I'm a plumber, so quite possibly what I am seeing is correct, though it seems a bit odd to my untrained eyes. Hoping someone might be able to explain a few things to me as I need a bit of reassurance regarding RCD ratings. I'm currently at a relative's...
  7. S

    Classification of RCD - for Additional protection only or Fault protection?

    I would appreciate some opinions on the following situation... I have been asked to comment on an EICR for a local community resource (church hall used by various groups of all ages). During an EICR on the TN-C-S installation the testing of a ring final circuit gave R1+R2 and Zs(db) values that...
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  9. R

    Surge protection devices

    Hi Guys Hoping for a straight forward answer. Please can someone tell me if SPD's are mandatory in domestic dwellings at the moment (Amd1) and are they going to be mandatory with AMD2. Thanks
  10. O

    Lunos 12v cable protection

    Query about what's required for cables in domestic setting carrying 12V; context is MVR System by Lunos. This has transformer that's installed in consumer unit; output is 12V max 4.5A max 54W This is run to switches from which the multicore J-Y(St)Y 4x2x0.8 powers small ventilation fans...
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  12. N

    Rcd protection for caravan hook ups

    I'm sure this will have been covered before but please bear with me. Have been asked to replace a main Distribution board for a fairly small caravan site and add in some new hook ups ( space for 8 x 16A sockets currently but upgrading to 12 x 16A and a 32A). Now this is all fed from one 100A...
  13. S

    Suggestions for frost protection stats

    At our church, one of the things I've done is sort out the heating wiring (as best I can for now). The schematic is as shown below. The theory that had me arrive at this goes : Previously, when the wall stats was satisfied, the pump stopped along with the boiler. As we have a number of...
  14. M

    Using armouring as earth and RCD protection

    Hi, If an SY cable is used to supply a consumer unit, and there isn't a guaranteed depth of 50mm for the wall it is in, would using the braiding as the earth negate the meed for RCD protection of that cable? Thanks
  15. B

    Lightning Protection systems T&I

    Hi All I am seeking a 1 day Lightning protection system inspection and test course in the east Anglia, Suffolk, Cambridgeshire area. A google search gives me few a far between courses and dates. Any help with find training specialists or courses would be a great help. Thank you
  16. A

    Arc Fault Protection

    Hi Everyone, question. Have furnace in basement (nothing else in basement besides electrical panels - not finished basement). Inspector is saying furnace is required to be on arc fault breaker. Per NEC 210.12, I completely disagree. Any input would be most appreciated. Thanks
  17. A

    Can a BS 61008-1 RCCB be used for fault current protection

    I am aware that a BS 61008 can't be used for overload protection but is there a reason that it can't be used for fault current protection.
  18. J

    mechanical protection

    Hi all, I know there is a reg on minimum height of mechanical protection i just CANNOT find it in AS 3000. Example - Conduit running down a wall into an underground requires cover guard, theres a reg that says that cover guard must be up to 1000mm can anyone help me? ive been been back and...
  19. S

    TNCS Dist CCT. to TT installation - front end protection question.

    Good Morning everyone. Quick question regarding a sub main from a TNCS supply feeding an outbuilding on TT. This is a domestic installation not agricultural. TNCS supply to house feeds High Int. CU from which 4mmsq 2 core SWA feeds an non attached rear building. THE SWA of the sub main is...
  20. A

    RCD protection for new pool heat pump

    Hi there all I have a quick question. My garden supply CU has a 100A AC RCD as main switch - off that is my greenhouse supply circuit. Then a 63A AC RCD which protects 7 circuits, one of which is a pool heater. I am replacing the old heater and the new one requires residual DC protection...
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