Assessment / Install questions

[Mat-sparks]

Hi All,

I soon have my Assessment with Elecsa (1st one) a friend of mine needs some work doing so am going to take advantage of this and use it as my Major works...

I have a couple of questions though.. (as I am obviously nervous and worried about covering everything correctly)

My friend needs his new hot tub wiring up...

Hot tub requires (according to rating plate) a 230-240v 16a class c breaker. This is fine, I understand this.
My problem comes in the form of my friends CU being obsolete, so obtaining MCB's for it is a pain anyway let alone finding a Class C.

So The options are, Complete consumer unit change - Friend not so keen on this, which is understandable

Try my luck with a B type which I can get 2nd hand (assessor may not like this if he notices the rating plate says a C)

I could (and this is what I will probably do, subject to peoples opinions) fit a 32a type B to the spare way in the CU, then run 4mm T&E to a small garage style consumer unit which I will locate next to the original CU and in this fit a 16a type C. Then from this run 2.5mm armoured down to Garden and straight into rotary isolator that is supplied with Hot tub.


Or am open to suggestions.

Cheers

 

[stitch]

Am I being thick? The link is just to home page?

I've typed in the name of the CU and Siemens type C and nothing??

Down on the right hand side in the orange part, Siemens MCB/RCBOs are there to select.

 

[GLENNSPARK]

I have a second hand C20 and a new C40 for one of these on the shelf. £10+postage and its yours

any spare ways on the protected side?
can it be reconfugured if not?

 

[stitch]

Got there before me Spoon.

 

[GLENNSPARK]

Cheers but I need 16a.

what CSA cable are you using?

 

[Mat-sparks]

Pick SIEMENS MCB / RCBO from the MCB's list on the right hand side and see if any are suitable.

No 16's on there! Is Type 3 the same as type C?

 

[Mat-sparks]

any spare ways on the protected side?
can it be reconfugured if not?

Whole unit is protected by 100a RCD Main switch.

There is one spare way in the unit.

 

[Spoon]

Got there before me Spoon.

Im quick or premature.. so the missus says

 

[telectrix]

just get the correct MCB. from post #9.... ssimpless.

 

[GLENNSPARK]

No 16's on there! Is Type 3 the same as type C?

use a 20 A type 3...
watch your Zs

 

[Mat-sparks]

what CSA cable are you using?

Was going to using 2.5mm, maybe even 4mm as it's supposed to be on Type C.

It's only 15m run.

 

[telectrix]

from the fuse company.siemens 5SY41, 16A type C.

 

[GLENNSPARK]

Was going to using 2.5mm, maybe even 4mm as it's supposed to be on Type C.

It's only 15m run.

MCBs to BS3871: type 1, type 2, type 3 & type 4

MCBs to BSEN60898: type b, type c & type d

 

[telectrix]

to BS1951/50.... 2" nail.

 

[Mat-sparks]

MCBs to BS3871: type 1, type 2, type 3 & type 4

MCBs to BSEN60898: type b, type c & type d

Am I right in think a 3 can be used in place of a c?

 

[Mat-sparks]

use a 20 A type 3...
watch your Zs

Sorry didn't see this, But will it go against me if he see's its a 20 instead of a 16?