Ring Final Circuit - spurs only

[UNG]

Because it is a safe method of isolation, you can't get more isolated than fully disconnected.

Really that was the point I was making to the post I quoted to see what response SJW would post as a reply

 

[davesparks]

Whatever standard and non-standard are.

In this situation standard refers to the standard circuits described in bs7671 and associated publications. They are best described in the on-site guide I believe.
Standard circuits refers to the 32A ring final, 20A radial and 32A radial circuits described in those publications. Details are given for minimum cable size, maximum length of cable etc etc

Non-standard refers to any other circuit which you will have designed yourself.

 

[nicebutdim]

Sockets are not for permanently used appliances. They are to be plugged in and out. Permanently wired in appliance need to be hard wired. And that in theory includes a 24/7/365 fridge.

Manufacturers have ensured that there's nothing permanent about fridges, nor any other white goods, and a fridge is one appliance that I'd never consider supplying from a ring in any new installation.

This one appliance is very likely to be the greatest source of trouble in your theoretical circuit, despite its relatively low power consumption, and for reasons you've failed to take into account.

 

[John-SJW]

And then, when the homeowner needs a new fridge, he has to get a sparky out to disconnect the old one and reconnect the new one.

Makes perfect sense to use a plug, especially since it will come with a pre fitted one.

Yep. Some fridges use 750 watt. That needs hard wiring.

 

[John-SJW]

Assuming the average ring circuit has 10 sockets on it and you save 3m of cable per socket that's a saving of 30m of cable.
At current prices that could be about £25 saved.

Depending on your preference for joint boxes they could realistically cost you £25.
Then you need to consider the additional time involved.

Other considerations are best practice, it is generally accepted that best practice is to avoid unnecessary joints in cables, every joint being a potential point of failure.

Also you need to consider maintainence and fault finding, it is going to be a lot harder to fault find a ring circuit where you can't readily get to the ring itself.

MF jboxes.

 

[DPG]

Yep. Some fridges use 750 watt. That needs hard wiring.

What? A fridge that takes 750 Watts must be hard wired and not use a plug/socket?

Please explain.

 

[John-SJW]

So why do some manufacturers consider removal of the plug from the socket is safe isolation of the appliance when they need to carry out warranty work. Back to the old you can't cut the plug off without voiding the warranty debate

Manufacturers come out with all sorts of nonsense at times

 

[DPG]

Manufacturers come out with all sorts of nonsense at times

It's not nonsense. A plug and socket is classed as acceptable for safe isolation. Check the regs

 

[nicebutdim]

Yep. Some fridges use 750 watt. That needs hard wiring.

In case it gets missed, I'll repeat the question from @DPG

Can you explain why this fridge might need to be hardwired?

 

[davesparks]

Yep. Some fridges use 750 watt. That needs hard wiring.

No it doesn't, the requirement for appliances of any power rating to be hard wired.