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Overloaded fused spur, opinion please

Foffer
I was an industrial electrician and have now come across a domestic wiring issue where nothing appeared wrong with the installation.  Those with more experience will have probably have come across this many times.


The kitchen is supplied by a 2.5mm T&E ring fed from a B32 circuit breaker.  On this ring there is a 13A fused switched spur above the worktop feeding a double socket underneath via 2.5 T&E.  There is a washing machine and a dishwasher plugged into this double socket.  Every so often, I assume when both appliances are heating at the same time, the 13A fuse in the spur blows.  The cable supplying this double socket is in the wall so the current-carrying capacity appears to be 18.5A so this was probably being overloaded as well.


I understand that in the regs diversity covers some aspects of this situation, but this specific situation must occur often surely?  The switched spur gives the ability to switch off the appliance easily without having to pull it out in order to reach the switch, so is surely desirable?


In this case I have installed a second switched fused spur feeding a single socket and converted the other to a single.


Is this a common problem in kitchens?
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    davezawadi (David Stone):

    I think that we are getting ridiculous here. Wagos or Ideal similar, to what BS are they made?Personally, I like the USA twist connectors but no BS although they are very good and robust, far more so than Wagos. The terminals in a 20A junction box actually carry practically no current, all they do is clamp the conductors together. Whilst I do use Wago types sometimes, I am not really very keen because the wires are not prevented from rotating, Springs of any kind are not my favourite way of holding things, they potentially do not make gas-tight connections. I, therefore, have a problem with an EICR, in that non-BS parts are used in an installation I have to take 133.5 into account and am probably contrary to 133.1.1 and 133.1.2 unless I explain to the customer.

     


    Nonsense. Wagos are certified, for example the 773 series we've been talking about have certification to EN 60998 series - all you need to do is look on the manufacturer's web-site.


    And EN 60998 series are BS's too ... https://shop.bsigroup.com/SearchResults/?q=60998


    We know from problems we've had with tails and consumer unit fires, that screw terminals don't protect properly against rotation either - especially solid (Class 1) and stranded (Class 2) conductors ... that's what the cord restraint and, where appropriate, strain relief, for flexible cables installed without clips etc. come into play
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  • 0
    davezawadi (David Stone):

    I think that we are getting ridiculous here. Wagos or Ideal similar, to what BS are they made?Personally, I like the USA twist connectors but no BS although they are very good and robust, far more so than Wagos. The terminals in a 20A junction box actually carry practically no current, all they do is clamp the conductors together. Whilst I do use Wago types sometimes, I am not really very keen because the wires are not prevented from rotating, Springs of any kind are not my favourite way of holding things, they potentially do not make gas-tight connections. I, therefore, have a problem with an EICR, in that non-BS parts are used in an installation I have to take 133.5 into account and am probably contrary to 133.1.1 and 133.1.2 unless I explain to the customer.

     


    Nonsense. Wagos are certified, for example the 773 series we've been talking about have certification to EN 60998 series - all you need to do is look on the manufacturer's web-site.


    And EN 60998 series are BS's too ... https://shop.bsigroup.com/SearchResults/?q=60998


    We know from problems we've had with tails and consumer unit fires, that screw terminals don't protect properly against rotation either - especially solid (Class 1) and stranded (Class 2) conductors ... that's what the cord restraint and, where appropriate, strain relief, for flexible cables installed without clips etc. come into play
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