Cross sectional area current capacity

[Gardner]

How would you go about figuring the current carry capacity of 2.08mm2 copper conductor? In so far no reg tables have none standard size.

 

[mattwoott]

You could always use the lower value as for a 1.5mm copper conductor or enquire of the manufacturer?

I reckon the main question would be why would you need value for a 2.08mm conductor? Quite a specific request, if it is new ask the supplier, if it is existing and installed how do you know it is 2.08mm?

 

[davesparks]

Easiest way is by enquiring of the manufacturer.
Otherwise use the nearest (smaller) standard size for that type of conductor and insulation.

 

[Gardner]

You could always use the lower value as for a 1.5mm copper conductor or enquire of the manufacturer?

I reckon the main question would be why would you need value for a 2.08mm conductor? Quite a specific request, if it is new ask the supplier, if it is existing and installed how do you know it is 2.08mm?

2.08mm2 is written on the jacket. This adds an extra 0.58mm of conductor, but looking at the regs this is right in between 1.5 and 2.5mm2. Do I just take the current capacity in between the two?

 

[Andy78]

2.08mm2 is written on the jacket. This adds an extra 0.58mm of conductor, but looking at the regs this is right in between 1.5 and 2.5mm2. Do I just take the current capacity in between the two?

No you do as suggested by the other 2 replies and ask the manufacturer.

 

[Richard Burns]

You are using a strange American type cable at the weird size of 14 AWG!!
:79::wink_smile:
It would probably not meet the UK specifications.

You would have to reference BS7769 (60287), BSEN60228 and IEC60502 to research the methods for current carrying capacity determination!

 

[davesparks]

2.08mm2 is written on the jacket. This adds an extra 0.58mm of conductor, but looking at the regs this is right in between 1.5 and 2.5mm2. Do I just take the current capacity in between the two?

No because the relationship between ccc and csa is not linear

 

[Gardner]

No because the relationship between ccc and csa is not linear

Exactly my hesitation, my understanding is that smaller conductors can carry more current per weight than larger conductors due to smaller conductors have more surface area and in turn can conduct heat away better?

 

[Gardner]

You are using a strange American type cable at the weird size of 14 AWG!!
:79::wink_smile:
It would probably not meet the UK specifications.

You would have to reference BS7769 (60287), BSEN60228 and IEC60502 to research the methods for current carrying capacity determination!

You wouldn't happen to know what equation is used in other regs like the IEC? My understanding is, and I could be wrong, that table 4D5 and others were derived via thermodynamic equations made by the IEC.

 

[davesparks]

As I understand it the values we use are the product of a combination of practical testing and calculation

 

[Darkwood]

Too many variants to make a guess and best advice already given is seek the manufacturers guidelines on this one or rate it to the next similar lower sized cable and your pretty much covered.

 

[Gardner]

Too many variants to make a guess and best advice already given is seek the manufacturers guidelines on this one or rate it to the next similar lower sized cable and your pretty much covered.

I came across this, however it seems to contradict the regs:

http://www.encorewire.com/wp-content/uploads/wire-size-table-CU.png

 

[7029 dave]

DW on the team then, well done, nice to see. Regards Dave.

 

[7029 dave]

Singles? or bundled. Never seen that size.

 

[Darkwood]

I came across this, however it seems to contradict the regs:

http://www.encorewire.com/wp-content/uploads/wire-size-table-CU.png

This is because its under different regulations and the cable standards are also manufactured to differing regulation too, we have our own BS standards we follow and the cable we buy is manufactured to either EU or BS requirements.