Discuss Diversity Calc Commercial Dishwasher 6.5kW single element in the Electrical Appliances Forum area at ElectriciansForums.net

It's most likely been converted from 6.5kw heater to 2.1kw heater by the supplier, either from new or as used.
So not a fixed 6.5kW load as per original OP, but one that can be terminated probably for 1ph 2.1kW element, which would account for it being ok (Not tripping or any thermal damage) on a 13A plug/socket.
And at 6.5kW could be 3ph??
 
Built and delivered from warehouse as stock 25/09/2017. 4.0mm² 3 core black flex.
Three years old. New to the customer. That's the way it is. I don't have a picture of the plug ans socket. I'll take one tomorrow. The problem it has is a faulty main boiler thermostat. This is the first issue it has had since new.
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An interesting experiment by John Ward. The destruction of a power cable. The point to note in this video is that the plug is a 13A plug and fuse. These continue to serve current up to 23.4 VAC.
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And here's teh video.

View: https://www.youtube.com/watch?v=rfU5lzXAHAQ&t=61s&ab_channel=JohnWard
 

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Why would anyone put it on a 13A plug when the nameplate clearly states 30A?
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Not sure what your point is with the video ............ Its still doesn't qualify for diversity and is currently incorrectly terminated .... 'in my book'!
 
I'm not sure why this thread has run to 23 posts.
As above a 13amp plug and socket is not suitable for a 6.5kw load, if that's what it really is.
Diversity doesn't come in to it.
It needs a suitable plug / socket or connection and a suitable supply to it, if the existing one is not.
 
The data plate clearly states that it has a power consumption of 6.5kW and requires a 30A supply so that is what it should be connected to. If they want it on a plug then a 32A plug would be appropriate.

Diversity cannot be applied to the supply to the appliance if it is a single heating element as that element will only be either on or off, appliances with multiple heating elements controlled by different thermostats can have diversity applied as they will all be cycling on and off at different times.

Diversity can be applied when considering the supply to the DB that then feeds this machine (assuming it is fed from a DB which feeds multiple circuits) but this does not have any bearing on the supply to the machine itself.

As to how the plug has not burned out yet, it is probably probably luck or an incorrect fuse or a modified appliance......
 
In the link that Westward provided in #19, it says:

Machine will be set for 30amp supply with relevent cable, if they are ordered for 2.6kw 13 amp supply, the cable will need to be changed by the installation engineer as a UK 3 pin plug will not fit onto the cable

Has it been supplied as the 2.6KW unit and the installation engineer just butchered a 13amp plug on the supplied cable rather than replacing it?
 
In the link that Westward provided in #19, it says:

Machine will be set for 30amp supply with relevent cable, if they are ordered for 2.6kw 13 amp supply, the cable will need to be changed by the installation engineer as a UK 3 pin plug will not fit onto the cable

Has it been supplied as the 2.6KW unit and the installation engineer just butchered a 13amp plug on the supplied cable rather than replacing it?

Yes, It sounds like they're put a 13A plug on 4mm flex to me!
 

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