Double mcb for meter tails protection

[Strickers]

Im moving a consumer unit at customer request from garage into a cupboard understairs so customer doesn't have to leave house to get to unit. The tails would be 8m. I've considered using a type 'B' 80A DP MCB which will act as isolation and tails protection. Has anyone else used this method, i've not seen it used before.

Thanks Paul

 

[Deleted member 9648]

Either that or a 80a switchfuse......either would be acceptable.

 

[Strickers]

Cheers going swap a the main switch wylex tails isolator to a double pole mcb cheaper than a switch fuse. Cheers wirepuller

 

[mydigitalhome]

Out of interest what is the max length of tails, for some reason I thought it was 2m from main fuse. Does anyone know? As this is not my area of expertise.

 

[J@mes]

3m without it's own protection IIRC.

 

[TPES]

Out of interest what is the max length of tails, for some reason I thought it was 2m from main fuse. Does anyone know?

It's down to your LABC, usually between 2 or 3 meters, any longer than this then install a switch fuse isolator.

 

[mydigitalhome]

Thanks guys

 

[Deleted member 26818]

I think that's DNO, not LABC.

 

[kmcgold]

use a switch fuse
i wouldn't use a type b mcb

 

[TPES]

I think that's DNO, not LABC.

I'm sure it is LABC as the DNO couldn't care less what you do after there meter.

 

[Deleted member 26818]

No the main fuse is the property of the DNO, and it is their decision as to the length of tails that their fuse will protect.
Different DNOs specify different lengths, anything from 2.4m to 4m in my experiance.

 

[TPES]

Makes perfect sense mate, as to why we would install a KMF switch-fuse for longer runs as DNO don't guarantee the breaking of there cutout.

I'd always been told by many other sparks it was LABC and even by a building inspector that different LABC regions stipulate a set length

 

[claire_r]

80amp double pole mcb? I have never seen one and always installed a switched fuse, can anyone find a link for this mcb?! Be intrigued to see it!! Thanks

 

[ezzzekiel]

High Current MCB Double Pole 80A - High Current MCB Double Pole 80 Amp - High Current MCBs Double Pole - High Current MCBs 63 Amp To 125 Amp - Expert Electrical