Diversity Calc Commercial Dishwasher 6.5kW single element

[Ray Pooley]

What does it say in the Manufacturers Instructions? Should be able to find a copy online.

It recommends its own circuit just as you would for a cooker. "Do not use adaptors, multiple socket-outlets or cables of inadequate type and section or with extension connections not compliant with plant engineering standards in force". So it shouldn't be the way it is.

 

[DefyG]

None of that makes it 'right' or 'correct' as far as the regs goes.
If you are looking for confirmation that applying diversity will allow you a smaller circuit cable/OCD (15.4A) then I'm sorry it doesn't get my vote.
The analogy of a cooker doesn't carry any weight either, as a cooker is several elements as previously mentioned so diversity can be applied per OSG.
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So it shouldn't be the way it is.

Correct! ...... think you are finally getting the message!

 

[JBW175]

It recommends its own circuit just as you would for a cooker. "Do not use adaptors, multiple socket-outlets or cables of inadequate type and section or with extension connections not compliant with plant engineering standards in force". So it shouldn't be the way it is.

In that that case I’d mention it to the owner and advise accordingly just to put my conscience at ease.

Is there any chance you can clamp it and see what it’s drawing at full load?

 

[DefyG]

just as you would for a cooker

Really? I find it hard to believe the instructions would say that!

 

[Ray Pooley]

Really? I find it hard to believe the instructions would say that!

Not verbatum. So. C1, C2 or C3 then. If you had to.

 

[Wilko]

Hi - if I understand correctly an intermittent load of 28A has been connected to a 13A plug. What happens to the 13A fuse? It sounds potentially dangerous to me.

 

[Ray Pooley]

Hi - if I understand correctly an intermittent load of 28A has been connected to a 13A plug. What happens to the 13A fuse? It sounds potentially dangerous to me.

This is in fact the actual gist. It should blow at 1.66 times the rate which is about 21 amps. But it doesn't. Why doesn't it if it gets to 28A? I wouldn't mind sticking a clamp meter on it to see what the actual draw is just out of curiosity but I can't really. If you look at te theory it shouldn't work. But it does and without any noticable issues. For the last three years.

 

[DefyG]

Not verbatum. So. C1, C2 or C3 then. If you had to.

I wouldn't on someone else's word.
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If you look at te theory it shouldn't work. But it does and without any noticable issues. For the last three years.

And we've all come across similar instances where showers have been connected to a 2.5 t&e straight off a 32A RFC.

It works but it doesn't make right or correct!

Not sure what the real issue is here, why were you looking at the DW in the first place, if 'Its been working ok for the last 3 years', why or just curious?

 

[westward10]

I find it highly unlikely this appliance for the last three years has been connected for 6.5kw through a 13A plug and never had an issue. From this link it indicates it can be connected for different power ratings however for 13A the flex will require changing.

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[snowhead]

As above, there's no way it's survived with 6.5kw on a 13amp plug.
It's most likely been converted from 6.5kw heater to 2.1kw heater by the supplier, either from new or as used.