Ring final circuit vs Radial final circuit

[camerabloke]

And your still a git

 

[Dan]

Just bumping some threads in the Electrical Wiring Theories and Regulations forum category here on our Electricians Forums. If this specific topic isn't current, just ignore it, it'll drop off the list in no time. However, if it's something you'd like to contribute to, feel free to reply and bring it back into current discussion.

 

[Patrick Powers]

Ring mains are much better for the environment. Radials are wasteful of copper and more besides.

 

[LastManOnline]

Ring mains are much better for the environment. Radials are wasteful of copper and more besides.

Where did you learn that?

 

[Mikegh]

I'm a big fan of the ring circuit in general but I would be in favour of outlawing the ring final circuit in domestic installations

Reason being that it's not a necessity and it would prevent hazardous situations such as breaks in the ring and overcurrent on spurs

 

[telectrix]

I'm a big fan of the ring circuit in general but I would be in favour of outlawing the ring final circuit in domestic installations

Reason being that it's not a necessity and it would prevent hazardous situations such as breaks in the ring and overcurrent on spurs

still useful in a kitchen though. where the load would require a 4.0mm radial.

 

[DPG]

I'm a big fan of the ring circuit in general but I would be in favour of outlawing the ring final circuit in domestic installations

Reason being that it's not a necessity and it would prevent hazardous situations such as breaks in the ring and overcurrent on spurs

But if you get a break in the CPC in a ring circuit, at least you still have a CPC present.

Pros and cons of both circuits really.

 

[littlespark]

We’ve had this same discussion on a much more recent thread. No point going over it all again.

 

[DPG]

We’ve had this same discussion on a much more recent thread. No point going over it all again.

Fair point.

 

[LastManOnline]

We’ve had this same discussion on a much more recent thread. No point going over it all again.

Agree. Although I find the "ring circuit better for the environment" argument interesting. Smacks of desperation to me.

 

[LastManOnline]

But if you get a break in the CPC in a ring circuit, at least you still have a CPC

Except that it will be undersized and go undetected until the next full inspection.

 

[DPG]

Except that it will be undersized and go undetected until the next full inspection.

Oh yes, it's far from ideal I realise that. But on a radial it would be non existent.

 

[LastManOnline]

still useful in a kitchen though. where the load would require a 4.0mm radial.

You have hit the jackpot there TEL. Run a 4mm radial instead of a ring circuit. Let's see... get rid of the two 2.5mm,s.Replace with a 4mm.Thats a, saving of 1mm of copper per circuit. Think of the benefits for "the environment" ?

 

[7029 dave]

4mm radial x2 =8mm= no saving ?

 

[Pretty Mouth]

Except that it will be undersized and go undetected until the next full inspection.

Probably wouldn't be undersized, from an adiabatic point of view, unless rewireable fuses. From a Zs POV, possibly, but not if RCD protected.