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- Installing a 3ph circuit for a 2 x 6kW fryer in a commercial kitchen, would appreciate a second opinion on my calcs, thanks in advance?
Discuss Looking to install a 3ph supply for 2 x 6kW fryer in a commercial kitchen. in the Commercial Electrical Advice area at ElectriciansForums.net
4mm is capable of 42A installed like this,
Thanks plugs and sparks, the fryer hasn't been purchased yet as I'm told it comes as a single or 3ph option, I done calcs for both but obviously best to install 3ph when you have the option as cable size for single phase comes in at 10mm. So not sure about terminal sizes etc. Could you go into more detail about your proposal please, just interested, thanks again for speedy reply?Haven't look at the calcs but if you can get two ccts in, rather than try and run two off one cct, its always better in the long run.
You can run 2 X 2.5sqmm 4 core terminate on two Rotary isolaters and put on a B16 breaker, almost impossible for that not to work (subject to calcs again. Lol
Biggest issue with a C32 is ELI
Haven't look at the calcs but if you can get two ccts in, rather than try and run two off one cct, its always better in the long run.
You can run 2 X 2.5sqmm 4 core terminate on two Rotary isolaters and put on a B16 breaker, almost impossible for that not to work (subject to calcs again. Lol
Biggest issue with a C32 is ELI
Thanks Ian, point noted, therefore multicore armoured @ 70 C is 33A for a 4mm cable, maybe I will go for the 6mm in that case as that states 42A ref method C. Appreciate your input mate?Do not base the ccc of the cable on 90 degree operating temperature, use the tables for Swa at a 70 degree operating temperature as the mcb and other terminals will not be rated for 90 degrees.
It's the 90C rating mate, but as Ian quite rightly pointed out @70 C it carries 33A on 4mm cable, so possibly will use 6mm. I'm installing it for this piece of equipment on a 32A commando with build in rotary isolator and rcd just in case of future use for something else. Also the DB is a discontinued Crabtree Polestar 125A, hence the reason for the 2 in one socket. CheersIs that the 90C rating or 70C rating?
Also if Ib is 17.3A then surely In would be 20A?
I wondered that too Dave sparks, that's why I politely asked to explain in more detail?How on earth can you connect a single appliance to 2x circuits safely?
It's the 90C rating mate, but as Ian quite rightly pointed out @70 C it carries 33A on 4mm cable, so possibly will use 6mm. I'm installing it for this piece of equipment on a 32A commando with build in rotary isolator and rcd just in case of future use for something else. Also the DB is a discontinued Crabtree Polestar 125A, hence the reason for the 2 in one socket. Cheers
2 X 6KW fryer = 2 X 6kw fryer = 2 appliances otherwise it would be 1 X 12KW fryer.How on earth can you connect a single appliance to 2x circuits safely?
2 X 6KW fryer = 2 X 6kw fryer = 2 appliances otherwise it would be 1 X 12KW fryer.
You need to take a chill pill, its hard enough deciphering half this stuff without you adding to it
32A would be my preference, the circuit is 15m long so EFLI not going to be an issue here.That still doesn't explain why you've selected a 32A OCPD for a 17.3A load when 20A would be the more logical choice?
I agree with you Dave sparks, my apologies I'm not fully up to speed with calcs as being honest I haven't done any in about 20yrs, as all large scale jobs I worked on had designers, so excuse my ignorance. Initially I had drawn up calcs for a 20A breaker but was advised by a designer to up it to 32 A and use a 2 in 1 socket, photo attached. Would you mind me asking for your personal opinion pleaseThat still doesn't explain why you've selected a 32A OCPD for a 17.3A load when 20A would be the more logical choice?
I will bow to the forums use of english, i could equally have assumed the OP missed off the S but struggling with why it would be described as 2 X 6KW and not 1 X 12KW, so i had assumed he only had one cct, hey hoI assume from the fact the OP has seen the spec for the appliance and is designing it as a single supply that a 2x6kW fryer is a single appliance comprising of 2 fryers, each rated at 6kW.
The language in the OP is quite clear "A circuit for A 2x6kW fryer" if it was indeed 2 appliances the OP would use the plurals, "circuits for 2x6kW fryers"
I agree with you Dave sparks, my apologies I'm not fully up to speed with calcs as being honest I haven't done any in about 20yrs, as all large scale jobs I worked on had designers, so excuse my ignorance. Initially I had drawn up calcs for a 20A breaker but was advised by a designer to up it to 32 A and use a 2 in 1 socket, photo attachedView attachment 59723. Would you mind me asking for your personal opinion please
I will bow to the forums use of english, i could equally have assumed the OP missed off the S but struggling with why it would be described as 2 X 6KW and not 1 X 12KW, so i had assumed he only had one cct, hey ho
Sorry plugs and sparks, I wasn't clear in my description, this is a twin fryer but 1 single piece of equipment, that is why I asked for you to explain, no offence intended. These fryers can be used individually or both together and come in both single and a 3ph option.2 X 6KW fryer = 2 X 6kw fryer = 2 appliances otherwise it would be 1 X 12KW fryer.
You need to take a chill pill, its hard enough deciphering half this stuff without you adding to it
Interesting.. I would never describe a double socket as a 2 X13A socket, that would be 2 X single gang sockets. It would be interesting when the fryer shows up what the rating plate says.... please OP take a pic.... it might make my day ( or not) lolFor me that is a perfectly normal way to describe the power rating of something, I see a lot of equipment with ratings like that. For example I install stage lighting dimmers described as 12x2.4kW or 24x2.4kW, these are single pieces of equipment which have 12 or 24 channels of 2.4kW dimmers.
Or a 2x13A socket is not 2 seperate items, it's a single plate with 2 bs1363 sockets on it, it's also not a 26A socket.
Reply to Looking to install a 3ph supply for 2 x 6kW fryer in a commercial kitchen. in the Commercial Electrical Advice area at ElectriciansForums.net
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