Current rating?

[mbrooke]

I keep getting conflicting answers. In some cases Im seeing the amperage of 1.5mm as 10 amps other times 16 amps, while 2.5mm is either 16amp or 20amps for the same heat dissipation constant. Im confused on which is the correct value. This is concealed in wall, not clipped to the surface.

 

[Canton]

I keep getting conflicting answers. In some cases Im seeing the amperage of 1.5mm as 10 amps other times 16 amps, while 2.5mm is either 16amp or 20amps for the same heat dissipation constant. Im confused on which is the correct value. This is concealed in wall, not clipped to the surface.

1.5mm is about 15 amps, 2.5mm is about 20 amps

 

[mbrooke]

1.5mm is about 15 amps, 2.5mm is about 20 amps

Thanks!

By chance do you know what temperature this is based on?

 

[petersonra]

Are you using this for a US building? If so, I think you would need to go to the next size down in the charts and use that, IF the wire insulation type was found in chapter 3.

1.5 mm^2 is a little larger than #16 and 2.5 mm^2 is a little bigger than #14.

 

[mbrooke]

Are you using this for a US building? If so, I think you would need to go to the next size down in the charts and use that, IF the wire insulation type was found in chapter 3.

1.5 mm^2 is a little larger than #16 and 2.5 mm^2 is a little bigger than #14.

Would such even be code complaint?

Oversea project. But, the thing is Im not finding the insulation type in the NEC. My understanding is like most IEC cables its PVC, but unsure of 60 75 90 or something totally different.

 

[petersonra]

Would such even be code complaint?

Oversea project. But, the thing is Im not finding the insulation type in the NEC. My understanding is like most IEC cables its PVC, but unsure of 60 75 90 or something totally different.

If it is not a type found in chapter three it can't use.

If it is for overseas there are codes and standards that would apply.

 

[mbrooke]

If it is not a type found in chapter three it can't use.

If it is for overseas there are codes and standards that would apply.

But what is the temperature of twin and earth/SWA ect? For romex its 90*C, restricted to 60*C.

BS7671 is giving me conflicting answers.

 

[Julius Right]

Usually the ampacity of an insulated wire in IEC World is standardized in IEC 60364-5-52 /2001
Part 5-52: Selection and erection of electrical equipment ? Wiring systems
concealed in wall directly see Table 52-3 (52H) ? Examples of methods of installation providing instructions for obtaining current-carrying capacity pos.57.
Reference method of installation= C [Annex A]
Table A.52-4 (52-C3) ? Current-carrying capacities in amperes
for methods of installation in table A.52-1 (52-B1) ?
PVC insulation/three loaded conductors/copper or aluminum ?
Conductor temperature: 70 ?C/Ambient temperature: 30 ?C in air, 20 ?C in ground
For method C copper 1.5 mm^2 17.5 A;2.5mm^2 24 A.
NEC for 75 conductor 16AWG [1.3 mm^2 [recalc. for 70 from 90] 16.9 A 14AWG [2.08] 20A
BS7671 Table 6C Single layer on wall or floor recommends method C
For method C copper 1.5 mm^2 18 A;2.5mm^2 25 A. [Table 6D1]

 

[mbrooke]

Usually the ampacity of an insulated wire in IEC World is standardized in IEC 60364-5-52 /2001
Part 5-52: Selection and erection of electrical equipment ? Wiring systems
concealed in wall directly see Table 52-3 (52H) ? Examples of methods of installation providing instructions for obtaining current-carrying capacity pos.57.
Reference method of installation= C [Annex A]
Table A.52-4 (52-C3) ? Current-carrying capacities in amperes
for methods of installation in table A.52-1 (52-B1) ?
PVC insulation/three loaded conductors/copper or aluminum ?
Conductor temperature: 70 ?C/Ambient temperature: 30 ?C in air, 20 ?C in ground
For method C copper 1.5 mm^2 17.5 A;2.5mm^2 24 A.
NEC for 75 conductor 16AWG [1.3 mm^2 [recalc. for 70 from 90] 16.9 A 14AWG [2.08] 20A
BS7671 Table 6C Single layer on wall or floor recommends method C
For method C copper 1.5 mm^2 18 A;2.5mm^2 25 A. [Table 6D1]

Thanks!

Is there a way to get the table for free or a link?