Discuss Radial Circuit Protective Device in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

D

daver

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Just been asked to jump on a job which needs completing before end of Jan.
The guy I'm helping is 74 and very experienced.
We are doing 8 double bedded flats. 5 Complete and 3 to go.
17th Edition split boards with 5 Circuits
Kitchen Ring - 32A
Lights - 6A
Smoke - 6A

Then we have 2 radials in 2.5 - 1.5cpc. 1 to 2 bedrooms with 6 double sockets total. Then 1 to living room with 3 doubles.

Each is protected with 16A Type B.

I thought it should be 20A, but he gave no explanation as to the 16A.

The only factors I know about is that the cables pass through some insulation (2M) and then are clipped direct and quite short runs.

The question being. Is he correct with his choice????
 
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S

Spudnik

  • Thread Starter Thread Starter
  • #2
It doesnt HAVE to be 20A however if you can up it from the 16 then it is fine on a 2.5 radial.

The cable is rated around 26A.
 
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B

BrianC

  • Thread Starter Thread Starter
  • #3
depends on length of run, installation method and volt drop.
You could put the circuit on a 10 amp breaker if you wanted, probably not practical though. Get the guy to explain why he does things, it is the only way you wil learn..
 
E

ezzzekiel

  • Thread Starter Thread Starter
  • #4
there is no problem running any circuit on any size breaker as long as all requirements are taken into account, its just usally a 20a radial in 2.5 or 32 in 4mm etc....
 
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