MK consumer unit SPD's

[bro8284]

Hi all,
I'll be wiring up two small new builds, the customer is supplying all the materials, they supplied MK consumer units, the problem is it doesn't seem MK are doing SPD's for their boards.
Any one know of a SPD that fits MK boards?

Thank you in advance

 

[mydigitalhome]

Agree with Richey3333, SPD’s very handy not just about Lightning strikes worth installing nearly every time. Just wait till Arc protection becomes mandatory on all circuits other countries already doing it. Makes up for the cheap electrical items people like to purchase and the dodgy installations.

 

[John-]

Agree with Richey3333, SPD’s very handy not just about Lightning strikes worth installing nearly every time. Just wait till Arc protection becomes mandatory on all circuits other countries already doing it. Makes up for the cheap electrical items people like to purchase and the dodgy installations.

I guess Arc protection will go the way of RCDs and become an integral part of the MCB?

 

[JDC]

Hi all,
I'll be wiring up two small new builds, the customer is supplying all the materials, they supplied MK consumer units, the problem is it doesn't seem MK are doing SPD's for their boards.
Any one know of a SPD that fits MK boards?

Thank you in advance

Try the Phoenix Contact 2804429. It’s a type II two pole Approved by MK for use in their CU’s.

 

[Deleted member 26818]

I guess Arc protection will go the way of RCDs and become an integral part of the MCB?

Seems to be combined RCBO and AFDD.

 

[Charlie_]

In theory an mcb already kind of has arc protection

 

[freddo]

In theory an mcb already kind of has arc protection

Yes but MCBs are not going to make billions of pounds profit for circuit protective device manufacturers.

I'm surprised they haven't recommended auto-reclosing RCDs in dual RCD boards to prevent 'vulnerable people' being left in the dark if an RCD trips. Think how much money they could make there...

 

[telectrix]

what's an SPD, a sexually passed disease?

 

[Toneyz]

Yes but MCBs are not going to make billions of pounds profit for circuit protective device manufacturers.

I'm surprised they haven't recommended auto-reclosing RCDs in dual RCD boards to prevent 'vulnerable people' being left in the dark if an RCD trips. Think how much money they could make there...

They are saving that for the next update or 19th.

 

[l4urence]

I need to agree that the domestic 'get out' for SPD fitting is fraught with danger (for us). We should fit them. I agree that we don't need to fit under the domestic [value] clause but NAPIT are advising that refusal (by the customer) is listed on the cert. If a surge does happen and the insurance company gets involved they will probably try to get out of paying due to this - or the customer will sue us for the damage because we didn't fit one. Just take care with advice / documentation if you or the customer chooses not to. I just fitted my first 18th Board with SPD and type A RCDs (RCBO's)- the SPD added only £60 to the cost and that included the mcb protection (Lewden).

 

[Markyd]

dont need one.......next please

 

[Markyd]

dont need one.......next please

 

[l4urence]

dont need one.......next please

Why? Explain your thinking. I’m always up for a bit of interpretation.

 

[Markyd]

not required in a single dwelling.....

 

[Markyd]

in fact not required anywhere......only a recommendation.......next

 

[SparkyChick]

I don't think this can be construed as just a recommendation:-

"Protection against transient overvoltages shall be provided where the consequence caused by overvoltage could:

(i) result in serious injury to, or loss of, human life, or
(ii) result in interruption of public services and/or damage to cultural heritage, or
(iii) result in interruption of commercial or industrial activity, or
(iv) affect a large number of co-located individuals.

For all other cases, a risk assessment according to Regulation 443.5 shall be performed in order to determine if protection against transient overvoltages is required. If the risk assessment is not performed, the electrical installation shall be provided with protection against transient overvoltages, except for single dwelling units where the total value of the installation and equipment therein does not justify such protection."

Given the cost of SPDs and the cost of the installation and connected equipment within a typical home these days, I think arguing it's not economically justified to fit one is pushing it a little.