Wylex plug in mcb availability

[EFLImpudence]

Too small for a 6mm?

Can't be because that (imperial equivalent) is what you would have needed with a 30A BS3036 fuse.

 

[333rocky333]

B and Q used to sell clones of them breakers under a different brand, i thought the notch thing was for the green 45a rather than the orange 40a
@JohnW2
Older versions were push button types using the fat base, then they changed to the toggle type like you have and stayed with the fat base i believe they were the old Bs 3871, they later changed again to the slimmer mcb with the slimmer base and Bs.60891
I seem to recall it was not wise to replace the breaker without the supplied base as the base would dictate how much of the blades went into the bus bar tabs

 

[ebee]

View attachment 410241I would say the two contacts look very different. I assume also different isolator, but with the rating written on the back View attachment 410242 not easy to see, back when these were used 60 amps was the normal supply.

Indeed, I reckon the original intention was that the lug on the "fuseholder" base was to cause it not to seat down properly to deter fitting of it, of course it was not uncommon for someone to saw/grind it off ore even just crudly cut it off with a pair of sidies!

 

[JohnD]

The presence of a 60A main switch is a recognition point.

If it has not fallen off or worn away, there will be a label under the switch.

In the heyday of Wylex standard, many small homes only had a 4-way CU

Lights 5A
Sockets 30A
Immersion 15A
Cooker 30A

 

[JohnD]

I seem to recall it was not wise to replace the breaker without the supplied base as the base would dictate how much of the blades went into the bus bar tabs

The coloured base slots were designed to fit only the size and spacing of the matching MCB or fuse holder prongs

 

[AndyPRK]

To my surprise when I changed from rewireable fuses to push in MCBs I had to changed the bases as well. Even though both were 30A

I guess rewireable base encased the melting metal and live bits.

 

[ebee]

The presence of a 60A main switch is a recognition point.

if it has not fallen off or worn away, there will be a label under the switch.

In the heyday of Wylex standard, many small homes only had a 4-way CU

Lights 5A
Sockets 30A
Immersion 15A
Cooker 30A

Yes indeed the ubiquitous Wylex 404 and its big brother the 604 , we were brought up on rewireable fuses and later on the MCBs (push buttons for a long time but they had the habit of sticking so later on replaced by flick switch) .
The colour coding of the spots on fuses was ingrained upon us.
The terminals (both outgoing and the incomming tails too) were tunnel terminals and two screws to each and the screw ends were slightly sperical dome shapre to bite in an indent anchor on the copper conductors - non of those terrible cage clamps we get all too often these days.