3kw appliance moulded plug top

[Daz2007]

Hi we have a client who insists on using 3kw induction hobs on their projects. These hobs are used 8-10hours per day and come with a moulded plug top. Safe to say the socket outlets keep melting/burning out. First thought was to remove the plug top and wire via a 16amp commando and appropriate 16amp rcbo (These sockets are wired on their own dedicated radial one radial per socket.) However removing the plug top would invalidate the warranty. The appliance is wired with a 1.5mm rubber flex. Not sure what else we can do with this other than tell the client to buy induction hobs that comes with a 16amp commando in the first instant. What's your thoughts on this? Thanks in advance.

 

[marconi]

OP: One might consider using so-called 'audio grade' 13A plugs and sockets which have silver or gold coated pins - silver and gold being very good conductors of electricity - silver being the better. Just google....

One has to minimise Ohmic heating viz I2R at all interfaces...........in order to achieve reliable long term ampacity.

Ampacity - Wikipedia - https://en.wikipedia.org/wiki/Ampacity

Rated current begs the question .............

 

[brianmoooore]

Does it need the £44.75 fuse ( Hifi Tuning Supreme 3 Copper 13A UK Mains Plug Audio Grade Fuse (Single Fuse) | eBay - https://www.ebay.co.uk/itm/392860669045?ViewItem=&item=392860669045 )

 

[marconi]

Does it need the £44.75 fuse ( Hifi Tuning Supreme 3 Copper 13A UK Mains Plug Audio Grade Fuse (Single Fuse) | eBay - https://www.ebay.co.uk/itm/392860669045?ViewItem=&item=392860669045 )

Of course I do not know if it does nor if anything else I have said earlier might satisfy the client. But the OP has a client who wants a certain thing to be, and if it was me wanting to keep his client satisfied - as the OP seems too - I might say to him I have done some research and we could try these things and if they prove successful then ........

I understand from the opening post this is a repeat customer for the OP whom he aims to please if at all he can.

 

[LastManOnline]

Something's gone very wrong with the design of these things if we have to rely on faceplates and back boxes as heatsinks to use them at their rated current

Yes. It's not that long ago that 3 kw loads were pretty much standard in kitchens and utilities. And there were never any question marks attached to a 13 amp plugtops ability to handle it.

 

[Midwest]

I’ve seen various pictures of burnt moulded plug tops, ones that can’t be messed around with and whose connections should be correctly terminated. Some have been the actual fuse and fuse carry, the cause.

Seems quality cannot be guaranteed.

 

[LastManOnline]

I’ve seen various pictures of burnt moulded plug tops

I, ve never really understood the benefits of them. It prevents us from checking and /or remaking connections. And the number of these plugs I have seen jammed in to low lying sockets with the resulting strain on the lead and socket itself unlikely to be of any benefit to either.

 

[brianmoooore]

Health and Safety is part of it. If a customer can't rewire it, he can't rewire it incorrectly.

 

[nicebutdim]

Health and Safety is part of it. If a customer can't rewire it, he can't rewire it incorrectly.

If they needed to rewire one, they'll just lop the original off and replace it.

 

[brianmoooore]

Ye, but that won't be the manufacturer's liability. Customer modified the appliance.

 

[LastManOnline]

Health and Safety is part of it. If a customer can't rewire it, he can't rewire it incorrectly.

That does sound like a peculiar stance by Health and Safety though. I mean in the UK the"customer " appears to be free to wire whatever he likes? So why should plugtops be off limits?

 

[Midwest]

Good ole JW took apart a defective moulded plug;

 

[Midwest]

Cutting off a 13A plug won't invalidate any warranty in itself. Connecting the appliance without appropriately sized fuse might.

You’ve not read my link

 

[brianmoooore]

Vacuum cleaner leads are a special case. No one could design a lead to survive for long if it gets treated like my wife treats ours. Nothing unusual to find it plugged in two rooms away, lead stretched like a trip wire between various bits of furniture.

 

[DPG]

Vacuum cleaner leads are a special case. No one could design a lead to survive for long if it gets treated like my wife treats ours. Nothing unusual to find it plugged in two rooms away, lead stretched like a trip wire between various bits of furniture.

Indeed. The cordless one we bought last year is one of the best things we have ever bought.