WHAT IS THE THUMB RULE FOR DECIDING THE CURRENT RATING OF
COPPER WIRES SAY 2.5/4/6/10 MM SQUARE SIZES??

Answer Posted / ramprakash

answer 9&12 is currect

Is This Answer Correct ?    0 Yes 8 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

how does high earth to neutral voltage affect electronic equipment?

944


Why does an induction generator is preffered as compared to synchronous generator in especially a wind energy power production project?

1605


Can i use the B-curve MCB instead of C-curve MCB

1601


i karmveer bharti persuing b.tech . plz send me syllabus and name of reference books. for preparation of section eng.

1661


How we can come to know the substation range,without go through any name plate ?

1501






what is the best method of grounding in 30 MW generator?

1507


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?

4176


what is the correct method for the outdoor termination of 19/33 KV HT cable step by step?

1643


What does a Bode plot tell you?

818


with 3 phase board on a 63 amp rcd is it ok to have 6 electrical showers 2 on each phase and what problems could happen

1406


My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

1452


In how we connect watt meter for open & short circuit test of a single phase transformer.

5654


Why air circuit breaker off due to power failure?

721


What is non-minimum phase transfer function?

648


How do we arrive at selecting reactive capacitance value as 30% of h.p rating of motor?

1379