6mm swa

[notsobrightspark09]

could anyone tell me why 6mm swa 3 core has a greater current carrying capacity than 6mm T&E?

 

[Chri5]

Because it does

 

[GaryMo]

Its ability to dissipate heat more effectively?

 

[notsobrightspark09]

ok

 

[Spark123]

Few reasons for differences, note the CCC always depends on the installation method.
SWA is a different construction to T&E
XPLE SWA is a 90 deg C cable hence it can take more current and run warmer, on the provision that it's terminations are rated to 90 deg C too.
PVC T&E is a 70 deg C cable.

 

[notsobrightspark09]

thanks garymo

 

[GaryMo]

Few reasons for differences, note the CCC always depends on the installation method.
SWA is a different construction to T&E
XPLE SWA is a 90 deg C cable hence it can take more current and run warmer, on the provision that it's terminations are rated to 90 deg C too.
PVC T&E is a 70 deg C cable.

PVC SWA is also 70 deg C.
I assume this is what he was comparing against T&E?

Clipped direct, T&E carries 47A compared to PVC SWA carrying 49A.

 

[Spark123]

Yep, I imagine it is down to the rate that the cable can dissipate heat as you say.

 

[notsobrightspark09]

so i can use a 40amp mcb as overcurrent protection for the 6mm swa?

 

[GaryMo]

so i can use a 40amp mcb as overcurrent protection for the 6mm swa?

Yes, depending on other factors like grouping, ambient temperature etc

 

[ban-all-sheds]

And EFLI.