UK I'll soon be installing a 45A 3 phase deep fat fryer at the school where I work.

[colinsmudger]

I'll soon be installing a 45A 3 phase deep fat fryer at the school where I work. The run is approximately 7m from the DB, and the cables will be enclosed in empty trunking. What size cables will I need?

 

[westward10]

Are you an electrician because this is quite a rudimentary question.

 

[littlespark]

Something between 0.75 and 25mm…..

Profile says you have 2391, so this should be straightforward…if you’ve got your 18th to hand. But maybe you don’t have much experience with 3ph stuff??

Have a think…

What size of cable would you need for single phase 45A?

Does 3ph rating mean 3 TIMES 45, or does it mean 45 ACROSS 3 phases? (Ie, 15 each)

Figure that out, then go into the 18th Ed tables for volt drop, and install method.

 

[davesparks]

That's one hell of a big fryer if its 45A 3 phase!

 

[goasis]

That's one hell of a big fryer if its 45A 3 phase!

Especially for someone who wants to size the cables based on an Internet forum!

 

[Dustydazzler]

Based on some of the schools where I have done PIRs for , I wouldn't be surprised if it ends up wired in 1.5mm 6243y

 

[LewisM]

From my experience comrade you'll need 5x2.5mm singles to a 5pin 16a interlocked rcd socket

 

[davesparks]

From my experience comrade you'll need 5x2.5mm singles to a 5pin 16a interlocked rcd socket

For a 45A three phase load? Thats pretty ambitious.

 

[Dustydazzler]

IS the OP certain that its 45amp per phase , as that is one huge fryer

Most catering fryers that I have wired up were roughly 13amps per phase and were wired in 2.5

 

[davesparks]

IS the OP certain that its 45amp per phase , as that is one huge fryer

Most catering fryers that I have wired up were roughly 13amps per phase and were wired in 2.5

I don't think the OP is certain of anything, or even coming back.

 

[LewisM]

For a 45A three phase load? Thats pretty ambitious.

Every commercial three phase fryer I've seen uses that setup unless this is a massive industrial fryer.... No wonder kids are so fat now

 

[Dustydazzler]

With the skyrocketing price of leccy I am surprised schools aren't taking out all the high consumption appliances and just serve sandwiches and fruit

 

[davesparks]

With the skyrocketing price of leccy I am surprised schools aren't taking out all the high consumption appliances and just serve sandwiches and fruit

There's nothing to say this isn't a private school where such things really don't matter.

 

[davesparks]

Every commercial three phase fryer I've seen uses that setup unless this is a massive industrial fryer.... No wonder kids are so fat now

I'm sure they have, but based on the information provided in this case you have advised someone to connect a 45A three phase load via a 16A socket and 2.5mm cable.

 

[Rockingit]

I think we're all fairly sure that this will turn out to be a 10kw / 13.5A/ph size of device, the only thing I find worrying is that this should be challenging to someone with 2391 under their belt.