Mk Ln5940 32amp Swap Out For 40amp

[Paul4162]

I'm well aware these are obsolete but just thought I'd join this site on the off chance one of you might have or know where i could obtain a MK LN5940 type 2 old type MCB. I'll pay for it plus postage, I've tried all other avenues but no joy so far. Hopefully I've come to the right forum. Cheers in advance! Paul

 

[Darkwood]

There are a few companies that do reconditioned obsolete gear, I would try that avenue ...ps welcome to the forum.

 

[Swcfisher]

What size do you need? I think I've got some

 

[Paul4162]

Awe hi and thanks for your reply I'm after a 40Amp but must be the old type. MK LN5940 Type 2 MCB I need to change an existing 32amp for the 40amp my daughter had just moved in to her first home which had a 8.5kw shower which keeps blowing the switch , it has the 10 mm cable but wrong size MCB. Many thanks.

 

[Andy78]

Awe hi and thanks for your reply I'm after a 40Amp but must be the old type. MK LN5940 Type 2 MCB I need to change an existing 32amp for the 40amp my daughter had just moved in to her first home which had a 8.5kw shower which keeps blowing the switch , it has the 10 mm cable but wrong size MCB. Many thanks.

The size of breaker might not be your problem might it ?
A 32A MCB is entirely appropriate for a 8.5kW load and should not trip even after a long duration. A 6mm cable is usually appropriate for a 8.5kW shower too, installation methods permitting. Is it tripping after a duration of use or instantly as the shower is energised ?

 

[Midwest]

The size of breaker might not be your problem might it ?
A 32A MCB is entirely appropriate for a 8.5kW load and should not trip even after a long duration. A 6mm cable is usually appropriate for a 8.5kW shower too, installation methods permitting. Is it tripping after a duration of use or instantly as the shower is energised ?

OP did say he's daughters house! Suspect its duration.

 

[telectrix]

could be that the breaker is just tired and old, like me and pete. .a replacement 32A might cure.

 

[Paul4162]

Hi thanks for your reply.
It trips after a fairly short time of use and I did also think it may be due to age but I'd have the same problem getting another 32amp MCB as I'm having finding a 40, I just thought I'd go for the size that the manufactures state for the shower which is a 40.

 

[Andy78]

Does the circuit incorporate a RCD ?
If not it might be easier to install a separate shower unit with the added benefit of RCD protection than to search for an obsolete breaker that will certainly be second hand and with no guarantee of proper function.

 

[Midwest]

This guy seems to have these mcb's, although think 40's might not be available; https://www.google.co.uk/?gws_rd=ssl#q=mk+ln5940&tbm=shop&spd=18430275511203254495 You could try contacting MK, sometimes e manufacturers sell off old stock to companies (this ones a bit old though). Failing that, wot about a nice new shiny CU!

 

[Paul4162]

There's already an RCD, I could just up grade the consumer unit as it's only a small one consisting of 6 MCB and an RCD as the property is only a small flat however I'm just looking at keeping costs down.

 

[Midwest]

If you can't find an alternate MCB, you perhaps should consider an RCBO populated CU (dependant on supply), or a dual RCD CU. As you are an electrician, you should be able to install this for your daughter at a very reasonable price!

 

[Paul4162]

Just managed to get another MK LN5932, 32A MCB so ill give that a go first when it arrives hopefully it'll only be as already mentioned the current MCB could be tired. Cheers and many thanks for all the comments.