Old M.K m.c.b ' LN5940 required'

[crystaljohn]

Hi My first post on this forum!

I urgently need a 40A m.c.b type 2 as I have an elderly disabled customer who is having a 8.5 Kw shower fitted in her bungalow. The metal M.k board was installed circa 1984, and the m.c.b required is a LN5940 type 2 or any equivalent that will fit the board. I have measured from the din rail to the front of the existing breakers fitted and its 53mm.

Any advise much appreciated.

Thanks, John

 

[The Godfather]

Welcome to the forum.

Don & His Boys

 

[baldelectrician]

MK used to do retrofit kits.

PM me for my method (don't want to put it on a non trade secret board)

 

[Andy™]

Hi My first post on this forum!I urgently need a 40A m.c.b type 2 as I have an elderly disabled customer who is having a 8.5 Kw shower fitted in her bungalow. The metal M.k board was installed circa 1984, and the m.c.b required is a LN5940 type 2 or any equivalent that will fit the board. I have measured from the din rail to the front of the existing breakers fitted and its 53mm.

Any advise much appreciated.

Thanks, John

i have loads of these, but there are 2 different types.

is it 6 or 7? (6 has raised sides next to bottom screw, 7 doesnt)

 

[Adrian]

I bet it is 7

 

[Apache]

I bet it is 7

I'll take 6 then

 

[SPECIAL LOCATION]

I'll take 6 then

6

 

[Andy™]

6

 

[crystaljohn]

Hi Andyc and all concerned. Aidrien wins the prize, its no.7

Please see enclosed photo.

Please let me know how much you would like for a 40A breaker and I'll either send a cheque or do a paypal transaction if you have an account.

Many thanks everyone for all the help, much appreciated.

Regards,John

 

[crystaljohn]

Many thanks to andyc for helping me out and sending me the breaker I required.

Very much apreciated.

Kind regards,John

 

[Badger]

Hi Andyc and all concerned. Aidrien wins the prize, its no.7Please see enclosed photo.

Please let me know how much you would like for a 40A breaker and I'll either send a cheque or do a paypal transaction if you have an account.

Many thanks everyone for all the help, much appreciated.

Regards,John

safe isolation comes to mind in the piccy B-)Applaud Smiley

 

[showerpower]

Hi, I am new member to the forum and have encountered the same problem as Crystaljohn. I have changed out a shower from 7.5 KW to 8.5 KW anf the CU is an old MK with a 32A type 2 mcb which noow needs changing to a 40A. At one of the local suppliers where I was trying to find an alternative make which might fit, the guy behind the counter said he had the same problem but just left the 32A mcb in place and his 8.5 KW shower continued to work without tripping the mcb!

He rsckoned it was because there is a lot of tolerance in the tripping value of the mcb. I have run the shower as he suggested and it appears to work OK. Does anybody know if this is correct or should I be having trouble sleeping at night worrying about it? If anyone has a 40A MK mcb type 2 I would be pleased tohear from them.

 

[steptoe]

Wylex will fit IIRC, but, depending on the door it may not close, I think, if memory serves, the wylex sits out a little further.

 

[Doc Hudson]

Hi, I am new member to the forum and have encountered the same problem as Crystaljohn. I have changed out a shower from 7.5 KW to 8.5 KW anf the CU is an old MK with a 32A type 2 mcb which noow needs changing to a 40A. At one of the local suppliers where I was trying to find an alternative make which might fit, the guy behind the counter said he had the same problem but just left the 32A mcb in place and his 8.5 KW shower continued to work without tripping the mcb!He rsckoned it was because there is a lot of tolerance in the tripping value of the mcb. I have run the shower as he suggested and it appears to work OK. Does anybody know if this is correct or should I be having trouble sleeping at night worrying about it? If anyone has a 40A MK mcb type 2 I would be pleased tohear from them.

Welcome to the forum, The 8.5KW rated shower would be approx 35.5amps, so only 3.5amps over your 32amp rating. Whilst maybe not the best arrangement, for the short duration that the shower is on I doubt you will have many problems.

Doc H

 

[NozSpark]

+1 doc...

However,,, when you go into the wholesalers remember who has the training and who is the shop assistant (not meant in a derogatory way) !!

 

[steptoe]

Welcome to the forum.Don & His Boys

holy sh1t,

he's back,

:worship

 

[showerpower]

Thanks Guys! I suppose that the worst that can happen is that I get called out to rescue a young lady shampooed up and standing under a shower without any water- dream on.

Seriuosly though if anybody has a 40A type 2 MKmcb in their van I would be pleased to purchase one. I tried alternatives but they do stop the lid closing as well as making it difficult to fit the copper links.

 

[Doc Hudson]

holy sh1t,he's back,

:worship

Old thread July 2009.

Doc H.

 

[steptoe]

Phew.

That'll teach me to look at post dates.

 

[batty]

Thanks Guys! I suppose that the worst that can happen is that I get called out to rescue a young lady shampooed up and standing under a shower without any water- dream on.Seriuosly though if anybody has a 40A type 2 MKmcb in their van I would be pleased to purchase one. I tried alternatives but they do stop the lid closing as well as making it difficult to fit the copper links.

What are you after is it one with open terminals or closed terminals they both were LN but probably not interchangeable.