Cooker on a grid switch

[Electroglow]

Hello. Customer has asked about a grid switch and tbh I have never installed one.

So I take it it's ran on a radial 2.5 l and n feed

Then all the appliances switched from the grid.

Now a cooker rated at under 13A could be put on the grid.

But then if they want to change the cooker to say a 32a supply then they would be screwed.

Any one ever put a cooker on a grid?

 

[Zeespark]

I havent, and to be honest, if a customer isnt sure whether they are having a gas or a lecky cooker, I would always advise them to get with an electric based feed.

AndyGuinness

 

[sellers]

For these appliance plates I usually run a 4mm, then 2.5 to each appliance.

 

[Manator]

Standard double pole grid switches are rated at 20amp, however you can get 32 amp grid switches. I use grids all the time and you can indeed get grid fused units, I use them because it saves a lot of space when putting multiple switches in a single position, for example I could have a fused switched unit, an emergency test switch and a light switch in the same space as a standard double gang back box.

If you run any cable in radial the whole of the cable run can be protected at the consumer unit with the appropriate fusing so for the cooker this could be anything from 6 amp to 32 amp and above, the switch will only be the isolator and local to the intended use.

 

[Electroglow]

Yes but then all appliances a d a cooker I. A 20a mcb overload will be a issue surely

 

[Manator]

You can get appliance grids, these are individual circuits but terminated in a central position, saves space again with individual fused spurs, and easier to test and maintain.

 

[Electroglow]

Ok so say u can get a 20a double pole switch.

Saying tumble dryer ect on it then surly the appliance is not fused. But the. The plug is fused according .

I would run 2.5 to the grid if only switching a few items.

I havnt seen a 4mm run before

 

[batty]

The job I am doing at present has 6 appliances from one grid. The customer wanted brushed chrome so I think I am being supplied by varilight although they are not in yet. I have two 4mm 32 amp radials going to grid box each switch is 20 amp D/Pole and each switch is also fused at 13 amps in grid box. Maybe a bit overkill having two circuits but there are three heating machines as well as two fridges and a cooker hood. Keeps it all central. I know click do 32 amp switches on grid. You could put that on its own circuit with separate cable. Only problem is the 32 amp ones take up two modules. But if the cooker only needs 13 amps you could have a 20 amp switch with a fuse unit which takes up two spaces and then in the future they want a larger cooker the two items could be replaced with a 32 amp switch.

 

[Electroglow]

Another thought... If it was wired as a ring then all the appliances would be on a FCU. So surely a 2.5 radial to feed 4 appliances would be fine. No high rated one any way.

 

[Steve3948]

I'm sure I read somewhere that these grid arrangements need to have a de-rating factor applied for grouping.

It was some time ago in either the PE, ECN.

 

[binky]

Would make sense as cables are grouped, albeit for a very short space. Could be argued on that basis that cables in CU should be derated, although it has to be said CUs have plenty of air movement. Assessment of materials surrunding grid, and cable runs needs to be made??

 

[Evans Electric]

Just make sure you fit a deep KO box, Electrolyte.