0
Table A1 - Conductor cross-sectional area, allowable continuous current and stranding.
Maximum Current in amps for a single conductor at insulation temperature ratings
Cross sectional
Area mm2
60°C 70°C 85 to 90°C 105°C 125°C 200°C
Minimum number of strands
Type A* Type B*
0.75 6 10 12 16 20 25 16
1 8 14 18 20 25 35 16
1.5 12 18 21 25 30 40 19 26
2.5 17 25 30 35 40 45 19 41
4 22 35 40 45 50 55 19 65
6 29 45 50 60 70 75 19 105
10 40 65 70 90 100 120 19 168
16 54 90 100 130 150 170 37 266
25 71 120 140 170 185 200 49 420
35 87 160 185 210 225 240 127 665
50 105 210 230 270 300 325 127 1064
70 135 265 285 330 360 375 127 1323
95 165 310 330 390 410 430 259 1666
120 190 360 400 450 480 520 418 2107
150 220 380 430 475 520 560 418 2107
NOTE: Conductor current ratings may be interpolated for cross sectional areas between those shown in Table A1.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Why is aluminium used in the central core in power cables?
Aluminium is a) strong b) light c) fairly cheap d) not a terrible conductor of electricity. It's much stronger, lighter, and cheaper than any material that conducts electricity significantly better than aluminium does.Why is that important?Well, if you're making wires for long-distance power transmission, having the wires be strong and light means you can put the towers further apart, which is a significant savings. In fact, aluminium is SO light that you can make the wire thicker (which makes it even stronger), and since power-carrying-capacity increases with increased cross-sectional area, the fact that it doesn't conduct as well as, say, copper becomes less important. And aluminium is so much cheaper than copper that even the thicker aluminium wire is cheaper than a copper wire of the same carrying capacity.
Why is aluminium usually mixed with other metals before it is used?
There are many different answers but some of the most common ones are:Aluminium is very expensive when being extractedAluminium on it's own is a soft metal, but it makes hard alloys. these can be used for planes, electricity cables, window frames, etc.
Why is electrical cable made of copper?
Electrical cables are made from copper because it is a better conductor than aluminium, it is also cheaper. If you did use aluminium then;it may set fire.may oxidize after a while and over heat.I hope this helped! :D
What is a thin-walled steel raceway of circular form with a corrosion resistant coating for protection of wires or cables?
In electrical wiring it is a pipe called a conduit. Wire and cables are run through for protection of the wiring.
What is sprayed on cables that are on seaplanes or exposed to agriculture chemical?
What is spray in cable seaplane
How do you calculate the current carrying capacity of cables?
if you know the gauge of the wire you can learn its current carrying capacity
What is the current capacity of two cables in parallel?
It will just be the sum of the current-carrying capacity of each individual cable.
Are transmission power cables capacity designed by voltage or by power is there any limit to the voltage that can pass?
Transmission power cables are designed by current carrying capacity.
Which table in BS 767112008 applies to the current carrying capacity of flat twin and earth cable?
The tables within Appendix 4; "Current-carrying capacity and voltage drop for cables and flexible cords." 4D1 to 4J4. For each type of cable, you will find (with a couple of exceptions) a Table A for current-carrying capacity values and following it, a Table B for voltage drop values.
What do you understand by square mm of electric cables?
In European countries and elsewhere, the cross-sectional area of electric cables and busbars are expressed in square millimetres. The larger the cross-sectional area, the greater the current-carrying capacity.
What is the current carrying capacity of 18 gauge wire used in vehicle wiring?
Upto about 16 Amps, provided the cables aren't wrapped or bunched up somewhere hot.
What is the current carrying capacity of sq mm copper and aluminium wire table?
For 3-core twin and earth cables up to 4 sq mm with reasonable air circulation, allow 8 amps per sq mm for copper and 5 amps per sq mm for aluminium. For permanent installations with high usage per day, use 4 amps per sq mm.
Why is aluminium used in the central core in power cables?
Aluminium is a) strong b) light c) fairly cheap d) not a terrible conductor of electricity. It's much stronger, lighter, and cheaper than any material that conducts electricity significantly better than aluminium does.Why is that important?Well, if you're making wires for long-distance power transmission, having the wires be strong and light means you can put the towers further apart, which is a significant savings. In fact, aluminium is SO light that you can make the wire thicker (which makes it even stronger), and since power-carrying-capacity increases with increased cross-sectional area, the fact that it doesn't conduct as well as, say, copper becomes less important. And aluminium is so much cheaper than copper that even the thicker aluminium wire is cheaper than a copper wire of the same carrying capacity.
Booster cables - what is the difference in use between copper cald aluminum and 100 copper wire?
It depends on some factors which are not mentioned in the question. The main difference between 100% copper wire and copper clad aluminum is that IF they are the same diameter, then the copper will carry and stand up to more electrical current than the aluminum. If the diameter of the aluminum cables have been upgraded in size, to match the current carrying capacity of the normal copper cables, then the only remaining difference is that copper withstands much more bending and coiling beforethe metal begins to "work harden," and some of the individual wire strands begin to break. In other words, the copper stands up to use better than aluminum. When buying booster cables, read the lables, and make sure that the maximum number of Amps, for which the aluminum cables are capable of carrying, is equal to or greater than the highest rated copper cables. Therefore, IF the copper clad aluminum cables are rated for the same current carrying capacity as copper cables, then there is NO difference in use between the two types.
Current carrying capacity of 4mm sq cable?
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
Is aluminium used for underground cables?
yes and it good for this jop
When nonmetallic-sheathed cables are bunched or bundled together for distances longer than 24in 600mm what happens to their current-carrying ability?
Increases
