Have come across a 16A Ring Final

[vwes59]

I've not come across this before. The current regs state it should be on a 32A MCB. I've been asked to re-wire a bedroom which will involve extending this ring. It already serves two other bedrooms and the lounge. I know I probably should tell the client to upgrade this MCB to 32A, but is it necessary ? The ring is on 2.5mm T&E. It's a bit of an unusual find. The house was built in the 1930's but was rewired only recently, so I'm surprised to find such a situation.

Any thoughts ?

 

[Dustydazzler]

Seen loads of rings on a !6a or 20a mcb , especially on newer builds and new flats

I think some sparks do this for 2 reasons , 1 because of de-rating for insulation and 1 because they ran out of 32a devices

 

[Strima]

If it's an older property there may be a break in the ring and the OCPD has been downrated.

 

[littlespark]

Are you sure it’s a ring?
As above… maybe it was a ring but due to a fault it’s been turned into a two branch radial.

Don’t replace it with a 32 unless you know for sure…. And quite frankly, why would you need to? 16 will be sufficient for bedrooms.

 

[James]

Are you sure it’s a ring?
As above… maybe it was a ring but due to a fault it’s been turned into a two branch radial.

Don’t replace it with a 32 unless you know for sure…. And quite frankly, why would you need to? 16 will be sufficient for bedrooms.

Getting a bit tight if there are a couple of people who like to use hair driers etc at the same time, that is up to 16A on its own.

 

[littlespark]

Getting a bit tight if there are a couple of people who like to use hair driers etc at the same time, that is up to 16A on its own.

Sounds like you've got daughters as well. driers, straighteners, chargers, music on full blast.....

 

[Petej999]

I've not come across this before. The current regs state it should be on a 32A MCB. I've been asked to re-wire a bedroom which will involve extending this ring. It already serves two other bedrooms and the lounge. I know I probably should tell the client to upgrade this MCB to 32A, but is it necessary ? The ring is on 2.5mm T&E. It's a bit of an unusual find. The house was built in the 1930's but was rewired only recently, so I'm surprised to find such a situation.

Any thoughts ?

Is it a RFC? Have you tested for r1r2 and rn? R1+R2 ETC

 

[James]

Sounds like you've got daughters as well. driers, straighteners, chargers, music on full blast.....

I once went to a party as a guest and had to move several circuits onto a different phase because on top of the expected heating and cooking loads that were above and beyond normal,

8 to 10 of the fairer sex were upstairs in various rooms beatifying themselves with all of the above.
eventually they took out the 100A incoming fuse, the cable was hot to touch!

 

[telectrix]

Getting a bit tight if there are a couple of people who like to use hair driers etc at the same time, that is up to 16A on its own.

16A for 2 hair dryers?? sure they not paint strippers.

 

[James]

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