Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / pk
It depends on the length from source to load, maximum permissible loss and thermal capacity of insulation.
Resistance = Rho x Length / Cross Sectional Area
Voltage Drop = Current in the wire x Resistance
The resistance of the wire leads to voltage drop
Depending on how much voltage drop is permissible at the load the area should be chosen appropriately
The second factor is heat produced.
Energy Loss = heat produced = I^2 x R.
This will lead to a temperature increase. The insulation should be able to handle this rise. Also the losses should be as low as possible to improve efficiency.
This is the theory. Thumb rules of 3-5 Amperes per sqmm are prevalent in the industry
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
How u can give the overload setting to any motor protection relay for a HT motors with formula and Example?
why starting current is high and resistance is almost 0 during the starting of motor dc motor...?
how to failure indution motor insulation & how to improve heat in motor insulation
Is there any question in the name of Static Switch in UPS??
What are the site acceptance tests for power cables, DG Sets, LT panels & 30kVA UPS ?
what is the operating time for LBB and how does the LBB relay realise whether cb is opened or not?
WHAT WOULD BE THE FORMULA OF WIRE GAUGE FOR A FULL LOAD CURRENT
Draw the vector diagram and condition for the following: 1) Dyn1 2) Ynd0 3) YnYn0
What kind of preventive maintenance are there for transformer?
Is it possible to make a 5P10/ CT Ratio 50/1A Burden 5VA
How many methods use the load flow solution?
what is the interrelation between voltage current torgue speed and magnetic flux in case of different types of electric motors
What is milivolt dop test in Busducts? What is its significance & procedure to do the test?
we have a rewind motor of 2Hp,2800Rpm, 220Volt AC. how can we choose the running capacitor for this motor, any formula for that?
for hipot test on 33kV busbar, we will test on 70 kV or 56kV, what is the acceptable leackage current?
