As a rough estimate, for medium voltage cables directly buried in earth, I use 2 A / mm^2 for copper conductors, and 1.2 A/mm^2 for aluminum conductors.
However, the installed capacity of a cable is mostly dependent on how much heat can be dissipated to its surroundings, and ultimately the maximum temperature of the insulation material.
For this reason, it is important to know how the cable will be installed, what conductor is used (Al or Cu), the cable insulation (for both thickness and operating temperature limits), soil thermal resistance (if buried), and if there are other heat sources (cables, process pipes, incident solar radiation, etc) are nearby.
There are several cable manufacturers that provide reference current ratings for nominal installations. Check Nexans, Prysmian, or Okonite (US dimensions).
It can carry upto 100 Ampere.
2.5 sqmm cu cable current carrying capacity is 19 amps.
300a
You don't calculate the current-carrying capacity, you find out from the appropriate Tables in your country's wiring regulations. In the UK, this is BS 7671:2008 Requirements for Electrical Installation.The reason you must do this is that the current-carrying capacity of a cable depends on the conductor type, number of cores, the type of insulation, the method of installation, etc. Allthese factors are taken into account in these Tables.For a 2.5-mm2 copper cable, the current-carrying capacity can vary from around 22 A to around 36 A, depending on the factors described above.
140 amp
170A
The current carrying capacity of a conductor depends on various factors such as the material, temperature, and installation conditions. Typically, for copper conductors in free air, the current carrying capacity ranges from around 11 amps for 1 sq mm to 450 amps for 400 sq mm. However, these values can vary depending on the specific application and standards being followed.
according to manufacturers data sheet 325amps ,but plz tell me how to calculate current carrying capacity of a cable.
It can carry upto 100 Ampere.
25 amps, 6000 watts
1 sq..mm have max. capacity is 10 ampere if these are of copper approximately than 120 sq..mm having current carrying capacity is 1200 ampere
2.5 sqmm cu cable current carrying capacity is 19 amps.
I can say it is 29 Amps.But again it depends on the cable length.The more the cable length is the less the current carrying capacity will be.
300a
A 35 sq mm copper wire with an insulation factor of 75 or 90 degrees C is rated at 115 and 120 amps respectively.
You don't calculate the current-carrying capacity, you find out from the appropriate Tables in your country's wiring regulations. In the UK, this is BS 7671:2008 Requirements for Electrical Installation.The reason you must do this is that the current-carrying capacity of a cable depends on the conductor type, number of cores, the type of insulation, the method of installation, etc. Allthese factors are taken into account in these Tables.For a 2.5-mm2 copper cable, the current-carrying capacity can vary from around 22 A to around 36 A, depending on the factors described above.
the current carrying capacity of 16sq.mm copper conductor is as below: For Single phase A.C or D.C is - 76 amperes (VIR insulated) and that For Three phase A.C or D.C is - 66 amperes. (rubber insulated)