bulb blew and "wrecked" the fuse holders!

[js.b1]

Use the HRC fuse carriers with Wylex. Please do not waste your money buying the plug-in MCB because it is wasted money (better to change the CU to a split load with MCBs =A32-3). If you have bought them, take them back and get HRC fuse carriers (nothing wrong with a HRC fuse compared to rewireable).

Also buy a "Fluke Voltalert" from Ebay UK, about =A315 or so delivered.

Can you post a photo of the CU, you may have other remedials required?

- 1) meter tails (cotton covered rubber).

- 2) Main Equipotential Bonding not present or undersized.

- 3) Flash damage to the Wylex CU which is probably open backed wood.

Exactly as Mr Gabriel says do not use 5A plug-top fuses in place of HRC 5A for Light circuits :-)

[Allthumbs]

like here "

"supplementary! They come in 6, 32 and 40 while my wire fuses are rated

5 , 30 and 45?

[John Rumm]

"

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Its common for MCBs to have a slightly higher rating than the re-wireables that they replace. So you would typically use a 6A MCB for a lighting circuit previously protected with a 5A BS3036 (i.e. wylex style) fuse.

[Dave Osborne]

What's the breaking capacity of small BS1361 fuses?

Ah, 16.5kA. Good enough.

[Andrew Gabriel]

Most modern MCBs (not Wylex ones) for domestic CU's are 6kA which is probably going to be fine. You can also get 10kA MCBs, although more likely to be used in industrial CUs and dist boards. (These are marked M6 or M10 respectively.)

Of course you have the main fuse which is likely to be BS1361 or BS88, and some manufacturers of 6kA MCBs say they can be treated as 10kA when backed by a BS1361 or BS88 main fuse.

[John Rumm]

Memshield 2, do a range of 10kA ones...