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spd

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  1. 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...
  2. 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...
  3. 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.
  4. 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.
  5. 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...
  6. 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.
  7. 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...
  8. S

    SPD for TPN 100a sub mains

    Hi Guys, Looking for some options to provide surge protection to a 100a TPN sub main to be wired 60m from the origin Im currently looking at installing a 4 way TPN mccb panel board with spd at the origin but it looks as if its going to cost the best part of a grand This is obviously a far...
  9. W

    Type 1 SPD and over head lines

    Hi all i have just recently watched the NAPIT webinar on SPD’s and it says a Type 1 SPD device should be installed in premises supplied by overhead lines I’m assuming including domestic properties up to now I have only been using type 2’s in the consumer unit is everyone fitting type 1 in...
  10. V

    Is there a way to test a SPD without spending thousands ?

    I know there are many MFT's out there which can test SPD's, but they all cost thousands of pounds, and I personally can't justify that cost which currently isn't mandated. However it would be nice to know that when I install a SPD that it will function. Is there a way of testing such a device...
  11. S

    Type 2 SPD (equipment 10meters or more from spd)

    Need advice please, I've been reading alot on spds and came across this, please read the picture I have posted, I am querying "equipment" if the type 2 spd is installed say before the fuseboard in a separate enclosure are we then classing the fuseboard as "equipment" and will the spd then...
  12. newfutile

    Amendment 2 smoke alarms and SPD

    I know this has been brought up before but as a QS for a housing association ,i have been asked my opinion on interpretation of the regulations concerning SPD with smoke alarms (assuming they are a safety service). several scenarios exist here : 1. Upgrading or updating existing alarms (ie...
  13. W

    What cert is best for a new spd install?

    Brand new spd installed new tails, saying minor works is ok, I don’t believe so as tails are coming from metering supply via Henley blocks
  14. Pat H

    SPD in a plastic consumer unit.

    Adding an EC charger and looking at options to include an SPD. The consumer unit is plastic (but in good condition) Options seem to be to add an SPD (with isolator and MCB) before the consumer unit. Or add an isolator before the EV charger with an SPD, isolator and MCB. Or can an SPD be added...
  15. I

    SPDs do i need to fit them?

    Hi, I'm installing a new circuit in domestic dwellings for various housing associations my question is do I need to fit an SPD or would it be the responsibility of the housing association, the circuit supplies equipment in the garden I'm running a 2.5 twin and earth through the house fed from...
  16. S

    Spd and certification

    When installing a new dB with an mcb protecting the spd do you class this as a circuit and include it on the test schedule at cct 1 for example? Thanks
  17. B

    Amd2 SPD on smoke alarms

    Quick question guys, if adding mains smoke alarms in a rental / domestic property's will we also need to provide SPD now. cheers all
  18. newfutile

    3 phase SPD MCB size

    Does anyone know what size cable to use for a MCG type 2 SPD (3 phase) and what MCB.the manufacturers instructions don’t state any values! also should i use 3 x single phase or a 3 phase MCB?
  19. I

    will SPD protection now have to be added for an addition to an existing circuit

    can any one clarify if a SPD will now need to be installed when making an addition to a existing circuit? many thanks
  20. B

    Sources for SPD RCBO type A boards.

    Hi all, With Amendment 2 here has anyone found any good suppliers for SPD and RCBO domestic boards? I've found online a BG SPD + 8 RCBOs for about £190 which is about £40 cheaper than the local wholesaler. Are there any better deals out there for decent boards (I've seen 'Live' offering online...

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