what size of cable will i need for pizza oven, 3 Phase MCB?

[kevin1234]

If you want to learn - go google, or better still, sign up to a course.

Asking us for an asnwer is not the way.

You have been given two sets of workings. One is correct and one is incorrect. Try googling 3 phase power and see what you find.

why cant you tell me the answer instead of being ignorant! you forget you have been here yourself!!

 

[RF Lighting]

You are a danger to your customers and should not be doing this work.

I know you just want a simple answer, but that is not going to happen.

You are installing electrical circuits for a living, so the least you could do is actually make the effort to learn how to properly design and install circuits your self, rather than just guessing at it like you do now.

well how else am i supposed to learn when people wont help and understand that they were once upon a time in the same place i am just now, as i keep saying i want to learn, but cant get the experience as there is no work! so im trying my best to learn!

anybody help!

We are more than happy to help people learn on here, but what we will never do is encourage poeple to do work they are not competent to do.

The way you need to learn is by going on a course or two, and doing plenty of reading. By all means feel free to ask questions if there is something you don't understand, or you would like to learn about in more depth. The wrong way to do it is by having a go and learning by your mistakes. Unfortunatly in this industry, a mistake can easily result in death, injury or fire.

If we told you what size cable you needed to install for you pizza oven, would you be able to work out all the other things which need to designed into your installation?

Can you tell me what the supply type is? and what size main earth and MEBs are required for this supply type? Are these in place and the correct size?

What size is the existing supply, and is there sufficient capacity for the additional load?

Does the oven need a local isolator? how many poles does it need to have? What rating should it be? How close or far away from the oven should it be?

What temperature rating should the cable to the oven have?

What curve type does the MCB need? What kA rating does it need to be?

Does this installation require emergency switching?

Can you answer all these questions?

Oh, and we are not being ignorant or big headed or what ever. We trained up properly, and were competent to do the work before we started up on our own, rather than just having a go at it, putting peoples lives at risk.

 

[ColJack]

as you've found out, the course can only teach you so much.. that's why you're not a sparky until you've got 10 years experience under your belt..
until then you work as a mate or improver ( or even an apprentice ) with a more experienced electrician who will teach you the tricks of the trade.. and even then you're always on a learning curve..

 

[kevin1234]

You are a danger to your customers and should not be doing this work.

I know you just want a simple answer, but that is not going to happen.

You are installing electrical circuits for a living, so the least you could do is actually make the effort to learn how to properly design and install circuits your self, rather than just guessing at it like you do now.

anybody help!

We are more than happy to help people learn on here, but what we will never do is encourage poeple to do work they are not competent to do.

The way you need to learn is by going on a course or two, and doing plenty of reading. By all means feel free to ask questions if there is something you don't understand, or you would like to learn about in more depth. The wrong way to do it is by having a go and learning by your mistakes. Unfortunatly in this industry, a mistake can easily result in death, injury or fire.

If we told you what size cable you needed to install for you pizza oven, would you be able to work out all the other things which need to designed into your installation?

Can you tell me what the supply type is? and what size main earth and MEBs are required for this supply type? Are these in place and the correct size?

What size is the existing supply, and is there sufficient capacity for the additional load?

Does the oven need a local isolator? how many poles does it need to have? What rating should it be? How close or far away from the oven should it be?

What temperature rating should the cable to the oven have?

What curve type does the MCB need? What kA rating does it need to be?

Does this installation require emergency switching?

Can you answer all these questions?

Oh, and we are not being ignorant or big headed or what ever. We trained up properly, and were competent to do the work before we started up on our own, rather than just having a go at it, putting peoples lives at risk.

well im only trying to learn the trade properly!, and any help would be much appreciated,

If i was told how to calculate the size of the cable and the breaker needed i would be able to do it. but i am wanting to learn how to calculate it.

thanks

 

[RF Lighting]

Can you answer all those questions I asked you?

 

[Lectrician]

If you read this thread, it is pretty clear how to calculate the size. In fact, the incorrect method has been clearly pointed out as incorrect.

If you re-read this thread YOU WILL LEARN how to calculate the loading of this pizza oven.

You can then start to calculate the cable size based on all the other variables.

Oh, and I am far from ignorant. Happy to help and direct, but not do the work for you.

 

[kevin1234]

If you read this thread, it is pretty clear how to calculate the size. In fact, the incorrect method has been clearly pointed out as incorrect.

If you re-read this thread YOU WILL LEARN how to calculate the loading of this pizza oven.

You can then start to calculate the cable size based on all the other variables.

Oh, and I am far from ignorant. Happy to help and direct, but not do the work for you.

well i cant see which one is wrong, could you tell me?

and i am sorry like, i was only questions as i really want to learn.

 

[RF Lighting]

We know you are keen to learn, but you don't seem bothered if you kill someone in the process.

 

[Lectrician]

you were right the first time oharaf.. for 230V it's
P/(3x230)


so 26.8A..

 

[kevin1234]

We know you are keen to learn, but you don't seem bothered if you kill someone in the process.

Off course i am bothered!, i have decided not to do the job but i am still keen to learn how this is done please.

 

[kevin1234]

you were right the first time oharaf.. for 230V it's
P/(3x230)


so 26.8A..

so why is this right! and not the other one then could somebody explain?!

 

[RF Lighting]

RFLighting : Born 12-08-09

 

[ColJack]

Can you tell me what the supply type is? and what size main earth and MEBs are required for this supply type? Are these in place and the correct size?

No I can't, haven't been to the job..

What size is the existing supply, and is there sufficient capacity for the additional load?

see above

Does the oven need a local isolator? how many poles does it need to have? What rating should it be? How close or far away from the oven should it be?

yes, 4 pole, IP65, with a 32A red 3phase socket.. within 2m ( should need to move the oven to clean round it.. if not I'm not having a pizza from there... )

What temperature rating should the cable to the oven have?

regular SWA to the socket, rubberised 5 core flex from the oven to the plug..

What curve type does the MCB need? What kA rating does it need to be?

heating elements? C curve should do.. 6kA..

Does this installation require emergency switching?

if the kitchen as a whole has an e-stop then it should be incorporated into that supply, otherwise any needed e-stop for a conveyor etc will likely be built into the oven..

so how many did I ger right and do I win a prize?

 

[kevin1234]

you were right the first time oharaf.. for 230V it's
P/(3x230)


so 26.8A..

so why is this right! and not the other one then could somebody explain?!?

 

[Lectrician]

Heating elements do not need a C curve, a B would likely be fine. There is no fans in pizza ovens.

Most TP breakers will always come as 10kA.

I would hard wire it with a rotary isolator. It's neater. You can still move the pizza oven if you require.

So, if you use a socket, do you RCD protect? That will get some brains working.