Two Parallel T&e Cables

[ProDave]

I've been asked to advise on a cooker upgrade at our sailing club.

Presently there's a separate hob and oven, each with their own radial circuit in 6mm t&e

One of the options under consideration, is an all electric range cooker.

Now they haven't chosen one yet, but in all probability, the rating of an all electric range will be too much for the existing 6mm cable.

So before I can advise them, can anyone see an issue, using BOTH of the existing 6mm cables and connecting them in parallel to make one suitably rated circuit for the range cooker?

 

[Andy™]

no major issues with 2 cables of equal size, but you do get more problems if using 3 or more. there is a section on cable in parallel

 

[Evans Electric]

I guess its OK. There are some regs to check for parallel circuits , one is IIRC the cables must be run together .

 

[Doc Hudson]

Appendix 10 has informative guidance for conductors in parallel. Two conductors of equal CSA and near equal length will be carrying near equal currents, but key point you need to consider is what protective device rating you will be using and verify that a short circuit in the one cable will cause the protective device to operate satisfactorily. If cables are of different CSA or length then you get into the realms of individual protective devices.

Doc H

 

[Steve3948]

And must be the same length.

I contacted a Range manufacturer last year because the instruction booklet called for 10mm², however this was a replacement cooker and the owner had been told a 6mm² was fine. On calling the guy he said yes its fine on a 6mm² taking into account diversity its doubtful that all rings and ovens will be on together and at worse the mcb would blow. It was a 6mm² on a 32A, they have never call to say the mcb has tripped.

 

[ProDave]

They are the same CSA and both originate from the same DB and end up at the moment in adjacent DP isolating switches. So it's fair to assume they are run together. Will obviously test to verify they are of similar length.

 

[wozz]

I've usually put them on 40A even though the ratings something ridiculous, although these have been in people's houses and for show rather than serious cooking.

 

[ProDave]

This is the one they are considering http://www.comet.co.uk/p/Electric-Range-Cookers/buy-DELONGHI-DTC95E-Electric-Range-Cooker/467960#product_desciption

Typical. The "technical specifications" does not give it's rating.

But I love the "questions and answers"

"Do you supply connection cable and plug?" :slap

 

[Andy™]

nothing wrong with a bit flex and a plug... although i doubt there are many houses with a 32 (or 63a) commando socket...

 

[binky]

This is the one they are considering http://www.comet.co....duct_desciption

Typical. The "technical specifications" does not give it's rating.

But I love the "questions and answers"

"Do you supply connection cable and plug?" :slap

check manufacturers site

 

[ProDave]

check manufacturers site

Go to www.delonghi.co.uk

Search for "DTC95E"

"0 products found" headbang headbang

Some customer support that is then. Although it bears the Delonghi name, they deny all knowledge of it.

I'll just wait until they get it and rtfm to see what it's rating is.

 

[Sharpend]

Have you had a look here http://www.buyspares.co.uk/images/mediator/8/dtc95e.pdf

Dave?

 

[ProDave]

Have you had a look here http://www.buyspares...or/8/dtc95e.pdf

Dave?

Thanks. So why isn't that on Delonghi's website?BUT it still doesn't tell me the bloody rating.

Burried throughout the instructions is the individual rating of each element, so I could add it up, but you would have thought there was a specification section telling you.

 

[Steve3948]

Thanks. So why isn't that on Delonghi's website?

BUT it still doesn't tell me the bloody rating.

Burried throughout the instructions is the individual rating of each element, so I could add it up, but you would have thought there was a specification section telling you.

Also states 3 X 6.00mm² and diversity should should be worked out by a professional, but higher up says no diversity.

Not for commercial use also.

 

[binky]

Go to www.delonghi.co.uk

Search for "DTC95E"

"0 products found" headbang headbang

Some customer support that is then. Although it bears the Delonghi name, they deny all knowledge of it.

I'll just wait until they get it and rtfm to see what it's rating is.

that's handy then :slap

 

[binky]

http://www.buyspares...or/8/dtc95e.pdf

had a look at this link, by 3 * 6mm I think they mean between the connections for the incoming Line conductor terminals - our Euro buddies seem to like 2 and 3 phase systems, and terminals are also for commercial, but got the feeling it was poorly explined as per normal. So in short it sounds like 6 mm feed cable would probably be fine, but seeing as you have 2 cables, you might as well use them. as long as MCB is correct then it can only trip out if overloaded. Bet if you put it on 40A MCB, it never trips ray if you look at diversity tables (I'm doing this from memory) then cooker ccts only rate 10A, 15A with socket. ie run at about 1/3rd continuous. On 40A that would give you 120A (so you've blown your main fuse :innocent ) or 27.6 Kw at 230V (rough numbers) think that's a bit larger than the hob and oven . 40A gives a good 9-10 Kw. Which pretty much everything on full whack from what I can see in the manual

 

[Steve3948]

http://www.buyspares...or/8/dtc95e.pdf

had a look at this link, by 3 * 6mm I think they mean between the connections for the incoming Line conductor terminals - our Euro buddies seem to like 2 and 3 phase systems, and terminals are also for commercial, but got the feeling it was poorly explined as per normal. So in short it sounds like 6 mm feed cable would probably be fine, but seeing as you have 2 cables, you might as well use them. as long as MCB is correct then it can only trip out if overloaded. Bet if you put it on 40A MCB, it never trips ray if you look at diversity tables (I'm doing this from memory) then cooker ccts only rate 10A, 15A with socket. ie run at about 1/3rd continuous. On 40A that would give you 120A (so you've blown your main fuse :innocent ) or 27.6 Kw at 230V (rough numbers) think that's a bit larger than the hob and oven . 40A gives a good 9-10 Kw. Which pretty much everything on full whack

Binky, bottom of page 2 seems to say different :innocent

 

[ProDave]

I know I fitted a rangemaster all electric once, and it's rating with everything on was about 12KW

 

[binky]

didn't read page 2, but either way KW peak aint that high

 

[PC Electrics]

You won't have any problems with that tiddler on a 32A/6mm. I've seen much bigger units on 32/6 with no apparent problems. But put it on a 40A to be sure.