Correct cable for element?

[chainsaw_masochist]

Would this cable product be acceptable to use to connect 2 x 3kw immersion heater elements? Thanks for any advice.

 

[HERTS P&D]

NO.

This one:

http://www.screwfix.com/p/heat-resi...core-2-5mm-x-1m-white/71940?_requestid=312035

Andy

 

[chainsaw_masochist]

Rightyo. Thanks for the link, Andy.

 

[securespark]

Isn't that 25A rating?

 

[JohnW2]

Isn't that 25A rating?

Indeed it is. I can't see what's wrong with the OP's original proposal to use the 1.5mm² flex (rated at 16A), assuming that he means that he wants one cable for each of the two immersion elements. If he wanted to run both through one cable, then even the 25A-rated 2.5mm² cable would technically not be quite big enough.

Kind Regards, John

 

[JohnW2]

Duplicate deleted

 

[slup]

The first link wasn't heat resistant cable?

 

[JohnW2]

The first link wasn't heat resistant cable?

Good point - I was only looking/thinking about CSAs (cable size). However, my comments about CSA still apply.

Kind Regards, John

 

[333rocky333]

Assuming there wired from TWO seperate 13 amp fcu's

http://www.screwfix.com/p/heat-resistant-flexible-cable-3183tq-3-core-1-5mm-x-5m-white/28239

However you do find a lot of people use the 2.5 as in above link for elements and storage heaters when there wired to 20 amp switches on 16/20amp circuits

 

[JohnW2]

However you do find a lot of people use the 2.5 as in above link for elements and storage heaters when there wired to 20 amp switches on 16/20amp circuits

Indeed. If they're hard-wired to a circuit with a 20A OPD, then theoretically one has no choice but to use 2.5mm². 1.5mm² is obviously fine if it's a 16A circuit or if there is a 13A FCU or 13A fused plug attached to the flex.

Kind Regards, John

 

[EFLImpudence]

Lot of confused thinking here.

Would this cable product be acceptable to use to connect 2 x 3kw immersion heater elements?

The answer is NO - only one.

FCUs aren't necessary and shouldn't be used for immersions on 15/16A or 20A circuits (20A ???)
As said, if 20A then use the correct cable rather than down fuse (we won't go into overload omission).

 

[JohnW2]

Would this cable product be acceptable to use to connect 2 x 3kw immersion heater elements?

The answer is NO - only one.

With your interpretation (I suppose reflecting what he actually wrote), that's true - but I think that most of us suspect that he probably meant something different from that.

As said, if 20A then use the correct cable rather than down fuse (we won't go into overload omission).

Indeed - or, if it is a dedicated circuit just for the immersion, downgrade the MCB to 16A, since there's no point in having 20A (particularly if that means having to use fatter cable) - a 16A circuit could use Method 100 or 102 1.5mm² T+E as well as 1.5mm² flex, but a 20A circuit would require 2.5mm² for both T+E and flex.

Kind Regards, John