Interested to Buy Any Domain ? << Click Here >> for more details...
how much current capacity of 300 sq. mm cable (4 core
aluminium) and 150 sq. mm cable ( 4 core aluminium)
- 3 Answers
- 29514 Views
- Bhel, RR Kabel, I also Faced
- E-Mail Answers
Answer Posted / 7anoter4
It depends on lot of factors. The duration of the load:
short-time[as in short-circuit case],continuous load,
intermittent load. It depends on also on ambient type [air,
underground-direct laid or in concreted duct],on thermal
resistivity of the ambient [if it is in underground],on
ambient temperature, on insulation type[bare, pvc, xlpe,
epr etc.] and other factors.
Let's say in short-circuit case for 1 sec 300 square mm
aluminum conductor pvc insulated. Permissible temperature
[for PVC short-time]= 150oC.Ambient air 30oC.
Ipermissible=27 kA[27000 A].
For the same cable in open air 30oC[NEC Table 310.15(B)
(17)] continuous load [75 oC]600 MCM=300 sqr.mm permissible
545 A
| Is This Answer Correct ? | 1 Yes | 3 No |
Post New Answer View All Answers
what is differant beetween overload current and phase current?
what is the criterion for selecting vector group of Transformers ? i mean how to decide vector group of Generator transformer, substation trasformer and transformer at consumer end
What is the Good Earth resistance value of G.I & Cu. Chemical Earthing & Normal Pipe Earthing?
how to calculate units consumption for a 12 hp motor /hr.
how to do the ductor test?
in a silicon diode we can measure .7v in a voltmeter.but why we can't use this voltage for using?
Define peak overshoot.
Dear all, I'm manikandan I have done by DIPLOMA EEE from 2011 , I have 5 years of experience from Power plant instrumentation field , which one field is give long life & which one field is best ,I confused a lot and also I'm studying AMIE, can I choose which department from Section B examination? pls tell me
what are the tests comes under the type test, what tests comes under routine tests.
how to select energy meter? have any calculation?
How to know th details about an electrical Drawing ? Please mention the easy method.
What is the function of Governor in Hydro Power Station? What is the Function of Lightning Arrestor Voltage Transformer (LAVT)?
EXPLAIN THE ESSENTIAL FACTORS WHICH INFLUENCES THE CHOICE OF SITE FOR A HYDRO ELECTRIC POWER PLANT
how to decide the capacity of accl
What is power relay?
