Interested to Buy Any Domain ? << Click Here >> for more details...
how to calculate the current capacity of a wire if its
dimension in Square mm is given
- 1 Answers
- 5110 Views
- TATA, I also Faced
- E-Mail Answers
Answer Posted / iamdon
The material of wire and the physical dimnsions are known.
1)From the physical property its resistivity(p)and melting
point can be found out(we need to depend upon techanical
specifications).
2)Resistance(R)of the wire can be calculated using the
relationship with the help of dimensional data
R=(p*l)/A where l=length of wire
A=cross sectional area of wire.
3)For a particular value of current(I)flowing through the
wire,the heat produced can be found by Joules law of
heating as
H=I*I*R.
4)Now we need to look into the ambient temperature in which
the wire is intended to work.After applying Newtons law of
cooling between allowable temperature of wire(considering
some factor of safety) and ambient temperature.We can find
current carrying capacity of wire.
Author:arbelectbit@yahoo.com
| Is This Answer Correct ? | 2 Yes | 4 No |
Post New Answer View All Answers
Can we check ELCB constantly from R1 to R8 phase in 1 no DB?
Please sent me some previous year question papers of BSNL-JTO telecom and RRB in ELectrical Engineering to varshashahi@yahoo.com
I would like to know that the fault curretn at base load and at 10% generation will be same? Fault level of BUS remain same with different generation?
Why sometime AVR and sometime Booster coil is used in Alternator? what is the diferance between AVR & Booster coil due to which they are selected
What will happen if a dc source is given to a tubelight. Will it work or wont it work....
WHAT IS THE USE OF PIG TAIL IN WINDOW CT ?
Why choke coil is connected in series with starter in tubelight??why starter is connected in parallel to tubelight??
sir,in our plant we r using SATEC PM172E power reading meeters in HT panel side it is monitoring the MB data smart viewer(sever).but last one week we did not get readings inthe server only available in meeter.tell me how communicate meter and server. and also what steps we take for checking.
EHV current carrying parts need to have smooth finish,then how can a 245kv GIS with emery finish can run so long?
What is the meaning of HT Trivector Meter ?
how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?
How is operate breaker failure scheme in substation
Sir, I have applied for the of Jr.engineer(Electrical & Electronics) & ASST. LOCO PILOT at ALL RRB BOARDS. please send me all RRB Boards solved papers in the year of 2001 tO till date. i requested send me the papers to my id as soon as possible (jet_0991@yahoo.com). (This is very urgent) Thank You,
How to confirm the Phase shifting Transformer VECTOR GROUP relation , as below ZNy11.45d10.45-ZNYy0.15d11.15
What are :- AC Distribution Board (Single & Double Front) DC Distribution Boards Distribution Board LT Breaker Panel.
