Ring or Radial

[geome]

I want to run a circuit around my garage 6 twin sockets
What is the best method to use Ring or Radial circuit
If radial it would consist of 2.5 t+e coming from CU in two circuits of approx. 24ft and 6ft in length protected by a 20 amp mcb

 

[RF Lighting]

It's probably marginally cheaper to wire them as a ring circuit.

There's not really much difference either way for a situation like this.

 

[ban-all-sheds]

When you applied for Building Regulations approval what did you say would be the way you would comply with Part P?

If, by default or by unthinkingly copying the standard text from your LABCs website, you said that the electrics would be done by a registered electrician then the answer to your question is

"The best method is the one your electrician wants."

 

[tonyelectric]

As you are going to use a 20A there is little difference, however if you ring you can up the breaker to 32A which gives you more flexibility on what can be plugged in, especially pertinent if say you want a 3KW heater on whilst using machinery etc..

As well as the MCB there should be RCD protection on this circuit, this may be provided on the incomer of your board, by a separate RCD or by an RCBo (a hybrid of an MCB & RCD).

Incidently don't be tempted to run this as an additional circuit from an MCB that is already serving another part of the house, it should have its own dedicated circuit.

Of course this is notifiable work under part P.

 

[denso13]

"The best method is the one your electrician wants."

Well sometimes it is, but all too often from what I have seen, it really isn't.

 

[PrinceofDarkness]

If this is an integral garage, you might just as well spur from an existing ring via a 13A spur. You'd be surpised how little load there is on a garage circuit most of the time. This way, you'll avoid the obligation to notify the work to the leeches at your BC (such is the foible of Part P).

Calculate your real need and constant power in that garage - it'll probably amount to next-to-nothing.

Once upon a time, the British used to keep their car in the garage, with nothing but a simple 60-Watt lamp installed..........



Lucia. [/u]

 

[ban-all-sheds]

As you are going to use a 20A there is little difference, however if you ring you can up the breaker to 32A which gives you more flexibility on what can be plugged in, especially pertinent if say you want a 3KW heater on whilst using machinery etc..
.
.
Incidently don't be tempted to run this as an additional circuit from an MCB that is already serving another part of the house, it should have its own dedicated circuit.

If it's on it's own CU then he could easily have 2 radials.

Radials would also make his testing easier to do.

 

[1john]

Radial - easier to alter when you realise nothing is in a convenient place or you want to add additional sockets. Minimal testing.

 

[maguire]

My personall choice for my own use is a radial in 4mm mainley because if its a garage/workshop/hobby it saves going up and over any doors and easier to add to later for that piller drill / tig welder/compressor/ you promised youself
DM

 

[geome]

Why are do so many Garage CUs come supplied with a 16amp mcb

 

[1john]

Why are do so many Garage CUs come supplied with a 16amp mcb

for a radial circuit

 

[B67BU]

I want to run a circuit around my garage 6 twin sockets
What is the best method to use Ring or Radial circuit
If radial it would consist of 2.5 t+e coming from CU in two circuits of approx. 24ft and 6ft in length protected by a 20 amp mcb

 

[maguire]

 

[1john]

That video was absolutely spot on!!

 

[dingbat]

That video was absolutely spot on!!

I know.

I made it.