Your question doesn't make any sense. Do you mean 630 mm2, in which case the fact that the conductor is square is irrelevant. Or do you mean a square with 630-mm sides, in which case it is enormous!
25 amps
what is the current carrying capacity of 4 core aluminum cable 300m long
according to manufacturers data sheet 325amps ,but plz tell me how to calculate current carrying capacity of a cable.
see cable table chart
The current-carrying capacity of a cable depends on a number of things in addition to its cross-sectional area; these include the type of conductor, number of cores, type of insulation, whether or not it is armoured, method of installation, etc. Accordingly, to determine its current-carrying capacity, you will need to refer to your national electrical code. For example, in the UK, BS 7671:2008 Requirements for Electrical Installations contains tables for all standard cable types, specifying current-carrying capacity, voltage drops, etc.
2.5 sqmm cu cable current carrying capacity is 19 amps.
It will just be the sum of the current-carrying capacity of each individual cable.
25 amps
64 AMPS
what is the current carrying capacity of 4 core aluminum cable 300m long
according to manufacturers data sheet 325amps ,but plz tell me how to calculate current carrying capacity of a cable.
The current carrying capacity of a cable depends on factors such as its material, size, and insulation. It is typically rated in amperes (A) and indicates the maximum current that the cable can safely carry without overheating. Exceeding this rating can pose a fire hazard or damage the cable.
see cable table chart
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.
350-400Amps
The current-carrying capacity of a cable depends on a number of things in addition to its cross-sectional area; these include the type of conductor, number of cores, type of insulation, whether or not it is armoured, method of installation, etc. Accordingly, to determine its current-carrying capacity, you will need to refer to your national electrical code. For example, in the UK, BS 7671:2008 Requirements for Electrical Installations contains tables for all standard cable types, specifying current-carrying capacity, voltage drops, etc.
It depends on the type of conductor, how many cores, type of insulation, how it is installed, etc. You will need to consider each of these factors, and check it out in the appropriate conductor data tables (e.g. in BS 761:2008).