spd

  1. J

    Solar DC SPD installation advice

    Hi all - relatively new to Solar but I’m looking for opinions on fitting DC SPDs on a TNCS installation. Are we just earthing the SPD from the CU/met or does anyone fit a dedicated rod instead? Thanks
  2. R

    Standalone AFDD board requiring SPD

    Has anyone fitted an SPD to a schneider standalone AFDD DB. Isobar P B Standalone Active distribution board, Acti9, 24 AFDD ways This board only takes AFDDs so there is no where for the SPD MCB to go. There is a DIN rail next to the main switch. The SPD comes with a separate enclosure. Acti 9...
  3. J

    SPD on old db in house with 5 boards all other circuits no protectiob

    Hi, I’m at a job on a grade 2 listed property with 5 different single phase distribution boards, the client wants sockets moved to new locations however the circuit I’m working on has a 32a rcbo but no SPD, all other circuits have to protection either. Any advice? Thanks
  4. P

    Non-selective RCD with SPD downstream

    Hi all, Grateful for your expertise regarding my confusion on the below. Context: French rural domestic property Single phase supply, TT earthing Supplier side RCBO (standard in France, usually next to the meter) - "disjoncteur de branchement" - 500mA, single pole protection, unspecified...
  5. punkin

    Surge Protection Device on old installations

    Hi I always thought installations were safe at the time of instalment etc, the Distribution Boards at my works were installed over ten years back. Our company just had its EICR done. The tester gave us a C2 for a number of DB’s which don’t have Surge Protection Device installed, these DBs with...
  6. D

    NICEIC Certification Scheme SPD on old consumer unit?

    Under amendment 2 of the BS7671, there is now a requirement to fit an SPD as standard. I am due to install a new outdoor socket circuit on an old consumer unit which doesn't have an SPD. Is it ok to do this installation without the SPD?
  7. ValgarGrimal

    BG SPD after RCD acceptable?

    Hello, I was looking at installing a SPD into an existing split load RCD BG consumer unit. In the instructions for the SPD it states that it may be positioned before or after a RCD but I have always been of the idea that the SPD needs to go before the RCD due to the RCD potentially tripping...
  8. oscarelectrics

    Does a circuit board with an SPD protect against internal surges?

    Hello! I'm struggling to find an answer to this question online. I'm new here btw - I'm a DIYer with a physics degree Currently when my fridge motor turns off, I get a transient voltage spike on other devices plugged into the same circuit (i.e. an internal surge) If I upgraded my circuit...
  9. P

    Phone line SPD on budget

    Following the tragic tale from @telectrix about lightning damage to phones and modem leading to a serious loss of beer money I decided to take a look at an el-Chepo SPD from Amazon to see if it looks worth considering. This one: https://www.amazon.co.uk/dp/B08FRN2569 When it arrived the box...
  10. ionionascu

    UK Is an SPD required for a loft conversion?

    Hi. We live in an older house and we are doing a loft conversion. We do not have an SPD on the connection to the grid and the builder's electricians insist that we must have one, otherwise he can't sign the certificate, but he doesn't want to give me a reason. We have a few consumer units under...
  11. R

    Do SPDs need RCD protection ?

    Hi there , Currently doing a college project where i need to select protective devices for the contract. I'm now at the point of selecting SPDs and had a couple questions. I have chosen MCG RCBOs for my circuit breakers in this project for all my boards apart from the board supplying...
  12. I

    New SPD Regs for Sub Main

    Now that SPD's must be fitted regardless, how does this stand from a sub-main perspective? Went to look at a job and they want a supply to a pre wired Shepherds hut 50M away with no SPD as it has been sat unconnected for a couple of years. The main incoming is entering an old barn that has a...
  13. I

    SPD on RCD acceptable or not?

    Inspecting and testing a consumer unit as part of my training and have noticed that the circuit breaker for the SPD is on the RCD? I am unsure weather this is acceptable as I haven't come across this configuration and I am pretty new understanding SPDs could one of you more experienced people...
  14. P

    SPD Conductor Size Question

    Hello, I have a Leviton 51120-1 SPD connected to a residential (120/240V) 200A breaker/service main panel – The 51120 is fed from (2qty) – 20A breakers in the service panel – All wires connected to the 51120 (L1&L2 hot, neut,& ground) are 12 AWG stranded conductors – The install instructions...
  15. I

    UK SPD in Existing metal clad CU?

    Hi all! Does an SPD have to go at the front end next to the main switch or can it be fitted with its MCB at the end of the row of MCBS on an existing CU to the far left? EG main switch on the right, end of MCB row on the left will have the OCPD for the SPD, and then the SPD sat to the left of...
  16. O

    different make SPD in consumer unit

    Is there a reg anywhere that states that you have to use the same make SPD inside a consumer unit. I know there are with MCB's as they obviously have to sit on the same bus bar but an SPD just slots in and has flexible cables wiring it up.
  17. newfutile

    Surge protection device failure mode

    I have come across a failed SPD, I thought I would take it apart and post pics for people to discuss. It appears to work by melting an alloy or type of solder to break the connection. I guess this is after the MOV decreases its resistance and increases the current.
  18. R

    Spd from main switch

    Hello all, i am fitting an Spd to an existing installation and looking through installation instructions and it has a diagram where the feed for an Spd located externally has come from the bottom of the main switch. Does not seem right to me. Just wondered what people’s thought were on this. I...
  19. Q

    SPD coding on an EICR

    Hi All, just carried out an EICR on a rented property that has mains smoke detectors, there is no SPD fitted and as I understand any safety service should be protected by an SPD, what code would you give this.
  20. T

    SPD Mains Isolator wylex/Proteus

    Hi, I was wondering if the wylex/Proteus SPD Isolators where dual isolator, they have 4 terminals at the bottom, can you use them to take 2 sets of tails of them. And what size earth should be used for the SPD when using 25mm tails and Is connecting it in parallel to the main earth correct...

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