How do I know what size cable I need for my motor?
How do I know what size cable I need for my motor?
The cable size is equal to the 1.5 times of the full load current of the motor/load. Hence the cable rating formula can be written as, Cable size = 1.5 x Full Load Current.
What is the cable size for 90 KW motor?
Cable Size Calculation of 90 Kw LT Motor in ideal case 157 amp shall be current capacity of cable and if we look at the cable size chart we will find that for 157 amp the current rating cable size 70mm2 cable size would be perfect.
What is minimum size of cable used for motor circuit?
Size of Cable for Branch circuit which has Single Motor connection is 125% of Motor Full Load Current Capacity. Example: what is the minimum rating in amperes for Cables supplying 1 No of 5 hp, 415-volt, 3-phase motor at 0.8 Power Factor. Full-load currents for 5 hp = 7Amp. Min Capacity of Cable= (7X125%) =8.75 Amp.
How many terminals from star delta starter to connect to motor?
This is pertaining to cable selection for star-delta starter which is to be connected from a panel. It is understood that we have six terminals from star-delta starter to connect to motor (i.e. two runs of 3-core cables from star-delta starter are to be connected to motor).
What FLC rating do I need for a star-delta starter?
But here, you are allowed to use 58% of the motor FLC rating for sizing each of the 6 conductors on a wye (star)-delta starter. That is because in wye, the current will be 58% of normal through both sets of conductors, then in Delta it will split evenly but if the conductors were sized at 50%, it would be too small for the Star connection.
How many amps does a star/Delta Line carry?
With a star/delta system of operation each of the six cores going to the windings carries 58% of the full load current ie 22 amps approx. Jaymac. I will revise my figure from 30 to 26 amps for the line current with the current splitting between two windings and 0.577 of it flowing through each being 15 amps. So 26 X 125% = 32.5 amps design current.
What is the minimum cable size for a starter motor?
The minimum cable size is (FLC)×125%, approximately 42A. We have 6 cables going from the starter to motor. Each set of cable need to be rated at 58% of the FLC. Therefore Click to expand…
