wylex 3871 and 60898

[dawsirn]

Hi,
does anyone know if wylex 60898's can replace it 3871 equivalent?
Just need to fit a 45a MCB for new shower a customer has fitted but he has 3871 board and I'm struggling to find a 45a 3871 and would rather fit a new mcb anyway.

Its the Wylex NSB type 2 MCB's. Couldn't get access to the board as its in really stupid position and requires taking kitchen units apart to access but could see it.

many thanks,

 

[yellowvanman]

is this an old Wylex CU with the 3036 fuses replaced by MCBs? In which case 60898 can fit into the CU

If its a new circuit shouldn't use 3871s are they are not recognised anymore. New shower - manufacturers instructions usually say should be protected by RCD, I'm guessing the CU isn't RCD protected.

 

[Flanders]

Don't think you can get a 45 amp wylex Mcb but you should be able to get a 40 amp old type NSB of Ebay wylex 3871 ncb | eBay But if is a new circuit t should be protected by an RCD so may be better getting a small shower unit DB or changing the board

 

[dawsirn]

Its actually RCD protected already and an existing shower circuit. He didn't realise he bought a higher rated shower and its been tripping the 32 amp MCB after being on for a little while, so I thought I'd look to see if I could find a 45a. Has anyone had any joy fitting a 60898 equivalent in one of these boards?
cheers

 

[Flanders]

The older Wylex MCBs have a part of the MCB that cuts out to fit the bus bar. I have not tried the new wylex MCBs but i don't think they will fit , If you are just swapping the MCB over then go for the 3871 off ebay , I can't see it being a issue as you are not altering the circuit, have you checked the cable in man enough.

 

[dawsirn]

yeah cable calcs are fine so I'll just have to have a little search on ebay.
Cheers

 

[Deleted member 9648]

The NSB breakers have a very different busbar connection to the 60898's....you'll need the right mcb.

 

[telectrix]

and just to muddy the water, as the shower is a fixed load you only need short circuit protection so you can fit a 50A MCB if you so desire. as long as the fibreglass monkeys don't come along and smother the cable.

 

[dawsirn]

and just to muddy the water, as the shower is a fixed load you only need short circuit protection so you can fit a 50A MCB if you so desire. as long as the fibreglass monkeys don't come along and smother the cable.

ah didn't think of that! I might have to go down that route as I'm still struggling to find a 45a and I'm not sure if a 40a will trip out too as i cant find any 3871 time curves at all. I'll get up in the loft and make sure the cable stays clear of the insulation! cheers