UK Re using a 10mm cable to provide a new ring

[pal1952]

I would like to reuse a 10mm cable to provide a ring circuit in an area. The cable is currently used for an electric shower, still connected at present and is fine. When the shower is removed I intended to replace the 40A breaker with a 32A, slightly reroute the cable and add a ring to then end. I have no idea where regs might stand on this however I can see no electrical reason why it should not be ok. I imagine that rerunning the ring will be suggested but that is easier said than done. Any thoughts.

 

[littlespark]

It’s known as a lollipop ring, or lollipop circuit.

Not very common, but doable.
Make a note of it on the test sheet under “departures”

 

[davesparks]

Make a note of it on the test sheet under “departures”

What is the departure?

 

[DPG]

What is the departure?

I think his intention is to mention it on the paperwork just to make sure future electricians know there is a non conventional circuit on the installation.

 

[davesparks]

I think his intention is to mention it on the paperwork just to make sure future electricians know there is a non conventional circuit on the installation.

That's not a departure and shouldn't be recorded as such.

 

[DPG]

That's not a departure and shouldn't be recorded as such.

Technically yes. Maybe a note attached to the report?

 

[davesparks]

Technically yes. Maybe a note attached to the report?

If you want the next electrician to have a chance of seeing it then put it on the circuit list attached to/near to the CU.

 

[DPG]

If you want the next electrician to have a chance of seeing it then put it on the circuit list attached to/near to the CU.

Or do both.

 

[littlespark]

If you are implying that the customer doesn’t keep a hold of the test certs for any future sparky… then why do we bother filling them in at all?


Whether it’s recorded as a departure or somewhere else… I just meant it should be noted somewhere.

Any future spark working on a board should have enough common sense to realise if say, circuit 1 is a 10mm, but circuit chart says sockets… then there’s something unusual going on. Quick read would confirm it’s by design and not a mistake.

 

[pal1952]

Thanks for the comments, all valid. More info it better than less (or none). I will mark the board to indicate that the circuit is "lollipop".

 

[pc1966]

The more common example of this has an isolator switch at the feed -> RFC point, for example, for a laboratory/classroom/etc.

You don't need one here, but at least an accessible and labelled junction box location is good, such as a blanking plate on the old cooker outlet, etc. 10mm is too big for the usual Wagos, but you might find something of adequate rating to fit in there.