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Cartridge Fuses in Domestic Fuse Boxes.

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How many domestic fuse boxes have you come across within the last year that have B.S. 1361 cartridge fuses in them? I came across one today. You know the ones. The 5 Amp cartridge fuse is just a little shorter than a 5 Amp. 13 Amp.  plug fuse. The 15 Amp fuse is coloured blue, 20 Amp yellow and 30 Amp red. The shower fuse may have been 35/40 or 45 Amp. I seem to remember that the 45 Amp carrier was orange. I have an old Wylex carrier here that has a brown cartridge fuse carrier and an orange base. I was impressed years ago with a cartridge fuse maker's video advert. It said that when a fuse blows you fit a new unused cartridge fuse that affords great protection and reliability, unlike with a circuit breaker that after time and many operations may become unreliable. That impressed me at the time.


Z.
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    I may be correct in saying that they were compatible with 1mm cpc ring circuits, but MCBs are not



    My copy of the OSG would seem to agree!

     

    My customer cut through his electric lawnmower flex in the garden. He blew the 15 Amp blue cartridge fuse in his fuse box. He sought a replacement and found them at a local hardware shop. He had to buy two in a packet. The cost was just under a fiver.



    An advantage of the 13A plug system when supplied from a 30A fused circuit - the 13A (or lower) plug fuse should discriminate very nicely with the 30A circuit fuse, which in turn should discriminate nicely with a 60A (or higher) DNO fuse. The fashion for MCBs rather messed that up. Not all progress is an advancement.


      - Andy.

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  • 0

    I may be correct in saying that they were compatible with 1mm cpc ring circuits, but MCBs are not



    My copy of the OSG would seem to agree!

     

    My customer cut through his electric lawnmower flex in the garden. He blew the 15 Amp blue cartridge fuse in his fuse box. He sought a replacement and found them at a local hardware shop. He had to buy two in a packet. The cost was just under a fiver.



    An advantage of the 13A plug system when supplied from a 30A fused circuit - the 13A (or lower) plug fuse should discriminate very nicely with the 30A circuit fuse, which in turn should discriminate nicely with a 60A (or higher) DNO fuse. The fashion for MCBs rather messed that up. Not all progress is an advancement.


      - Andy.

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