Spur off ring circuit

[Scalpel]

Hi, can anyone tell me if I am right in thinking that a spur off a 32 Amp ring circuit is acceptable even though the 2.5 twin and earth cable wouldnt be adequately protected against overload. Some of the sockets in my house have 3 sets of cables and some only have 1. Many thanks.

 

[PrenticeBoyofDerry]

You can spur of a ring final circuit (RFC) but only one spurred socket outlet per socket outlet on the RFC. Using 2.5mm T&E as cable for spur is acceptable.
The chances are that the outlets with 3 sets of cables are being spurred from and the outlets with one set are the spurs.

 

[Scalpel]

Thanks. Isnt there a fire risk on the spur due to lack of overload protection?

 

[PrenticeBoyofDerry]

No, tried and tested procedure no issue with fire hazards.
Overload protection still back at the CU connected to the RFC.

Untitled

• PrenticeBoyofDerry
• 29 Mar 2012
• 1

 

[Scalpel]

Thanks. Sorry to go on but I thought 2.5 was rated at less than 32 Amps.

 

[ricicle]

The current on the spur is limited by the nature of the load (theoretically 26A max. for a double socket, but that's another story !)
As long as the device at the CU provides short circuit protection then there is no problem. (Subject to the install conditions of the spur cable)

 

[Robin0577]

Thanks. Sorry to go on but I thought 2.5 was rated at less than 32 Amps.

It is, but the maximum that can be drawn (in theory) from one double socket is only 26A (although most won't handle more than 20). 26A is (usually, providing thermal de-rating factors aren't a problem) ok on a 2.5mm and that is why you're only allowed one double docket on any given spur...

damn - too slow

 

[Scalpel]

Thanks. Every days a school day, except saturdays and sundays, a week at easter, a week at halloween, few days for half term, 2 months at summer and a fortnight at christmas.

 

[PrenticeBoyofDerry]

2 weeks at Easter! The lazy bar-turds!