How the cable size for a motor is decided

Answer Posted / mithilesh

in Most of above answer every one stating about staring
current, current rating of motor but only one guy stated
about voltage drop of cable.

i think guy who stated about voltage drop,current rating,
power rating of motor( because starting current varies
with Hp rating of motor lower the hp higher the staring
current) his answer is more regionable than others.

from my experince i would say only full load current rating
of motor & voltage drop of motor will be enough to
calculate the cable size because staring current is only
for less time. and all cable has been designed for 2-3
times of rated current for 1 min. this answer will be
perfect for higher rated motor( more than 50hp)

less than 50 hp motor we have take consideration of
sttarting current( because starting current 3-4 times of
full load current).

Is This Answer Correct ?    7 Yes 2 No

Post New Answer       View All Answers

Please Help Members By Posting Answers For Below Questions

what is earth resistance? how to measured? and give values at power station and mcc area?


what is the main function of capacitors in mccs.


What is the real function of reverse power relay in generator panel while syncronising?


What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?


what is a speed of rotor when we give supply to stator of 50hz and as well as rotor of 60hz of an induction motor?????


Define sensitivity?


for a 400kv t/m line with 10 ampere current will corona occur?




What is tranformer differtial?


what is the difference between STAR and DELTA connection and application wise how it can be utilizedd ???


If a shunt Dynamo has induced emf 100V and 0.4 ohm resistance and battery of accumulator of open circuit emf 110V and 0.5 Ohm resistance are in parallel what is common terminal potential difference?


I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?


What is the difference between DOL starter and star delta starter


Is Transol transformer oil comparable to nynas nytro libra?


How Load Factor, Demand Factor, Diversity Factor etc best applied in designing an electrical circuit? Is it allowed to consider these factors in each and every panel in an electrical distribution system? Can any body suggest a good book for reference?