Current carrying capacity of 4mm sq cable?

Answer 1

AS PER THUMB RULE THE CURRENT CARRYING CAPACITY OF WIRE IS 4 TIMES OF ITS CROSSECTIONAL AREA OF WIRE i.e. 10 sq.mm wire carrying maximum current 40 amp , 16 sq.mm carrying maximum current 64 amp ,

now amp convert in watt by multiplying by volt i.e. 240

16 sq.mm carrying max load 64x240= 15360 watt

Answer 2

The current rating of a cable depends upon the type of conductor, the number of cores, they type of insulation, and the method of installation. Accordingly, the current rating can vary considerably. You need to refer to the conductor tables in BS 7671:2008 Requirements for Electrical Installations, to determine the current rating based on the above-listed factors.

Answer 3

Normally current carrying capacity tends to the maximum current withstanding capacity for the particular cable which is considered under to be designed. It depends on how you are laying the cable i.e., in open air, duct, or burried and the type of the conductor used in the cable i.e., aluminium or copper.

It should be noted that the selected cable overall outer diameter is in standard size which is standardized by the Cable Corporation of India Ltd., which provides the sizing limits for LT and HT cables separately. For the 90 sq.mm, it is not standard size. It is within the standards of 70 sq.mm, 95 sq.mm and so on.

For the 95 sq.mm cable, under open air, aluminium conductor, the Current Carrying Capacity (CCC) is 220 Amps in multicore and for the copper wire is 245 Amps (Trefoil touching), 275 Amps(Flat touching) in single core. It is for multicore 200 Amps for the copper wire.

Answer 4

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. All these factors are taken into account in these Tables.

For a 4.0-mm2 copper cable, the current-carrying capacity can vary from around 11 A to around 40 A, depending on the factors described above.

Answer 5

The current rating of a cable depends on the number of cores, its method of insulation, whether or not it is armoured, and its method of installation. Therefore, it doesn't have a simple current-carrying capacity. Instead, you must refer to the relevant tables that supply this information. In the UK, these are provided in BS 7671:2008 Requirements for Electrical Installations -the IEE Wiring Regulations.

Answer 6

Coductor cross-sectional area 4mm, single phase, 1 two-core cable, with or without protective conductor is 30Ammps.

Answer 7

240 mm conductor can carry 425 Amp. current in each core

Answer 8

5.6 amps to 10 amps

Answer 9

336A