Interested to Buy Any Domain ? << Click Here >> for more details...
how calculate cable size in squre mm, when the load is
given by in kw? do u have current rating chart of elctrical
cables?
- 4 Answers
- 12304 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
With knowing the kW rating and voltage, the current can be
calculated as I=P/(sr(3)*V*pf). The pf can be assumed to be
as 0.8. After knowing the current, choose the 10% higher
current carrying capacity cable for the safety purpose.
current rating for differnt cables are different for same
size.Copper has higher current carrying capacity.
| Is This Answer Correct ? | 10 Yes | 2 No |
Answer / moh. baheer
We can so easy calculate the current and choose the cable
size form chart if we have the quantities of Voltage (Volt)
and total power (KW) please find from this formula the
current rate according to the load (kW).
P = U*I*cosФ
I = P/U =?
Then we can choose the cable size from chart according to
current.
Regards
| Is This Answer Correct ? | 4 Yes | 1 No |
Answer / shahidul islam (srabon)
When the power is known in kW then the formula for knowing
the current in A is I=(P/(sr(3)*V(phase)). Now we the
current. After finding the current we know that the current
density of copper is 2.5. Finally to calculate the cable
isze we apply the given formula in practice.
I=A*2.5
so, A=I/2.5 (in square mm)
Where A=Area of conductor or here cooper is used
A=w*l
w=width
L=length of the conductor
Hope the answer of the question
| Is This Answer Correct ? | 2 Yes | 2 No |
Answer / abdul rahman
While all loads are given in KW,only current matters while calculating cable sizing assuming voltage remains constant neglecting minor fluctuations.
From power equation once u find the load current you decide the cable sizing.As a thumb rule 1sq mm of Cu carries 2.4A whereas Al carries 1.4A.
For example a 100kw load requires nearly 180A current.The cable sizing would be 4core X 95 sqmm Cu plus 1core 50 sqmm ECC.
Different manufacturers have their standard sizes hence the value main differ slightly but the thumb rules will help u.
| Is This Answer Correct ? | 0 Yes | 0 No |
WHY LATCHING CURRENT IS GREATER THATN HOLDING CURRENT?
how to calculate
what is idmt relay
Two electrically operated Vibro Motors are fixed in parallel direction in vibrating feeder. What is the direction of both Vibro Motors?
1) why a dg set shows variation of power factor and load when synchronised with other dgs? 2)Why the load sharing is not become equal in all dgs?. 3)When a dg set will not run on auto start?
some practicle study shows that the reactive power at the receiving end is not equal to the reactive power at the sending end.But according to theory the reactive power is exchanged by different parts of the network – capacitors and reactors permanently, but is never consumed or produced. Then Where that reacrtive power loss occuring?is there any formula to calculate reactive power loss?
How many straight through joint is permissible in single core 33kv XLPE cable for a length of 985 mtr.
defination of generator
what are the safety measures of induction motor?
When batteries are connected in series the voltage increases but the current remains unchanged, how can this be? When you consider ohm's law. i.e. If voltage increases, current increases, providing resistance remains the same.
what ll happen to current if two phases get short circuited
SMPS (Switch Mode Power Supply) unit is denoted by KW or KVA?
-
Civil Engineering (5086) - Mechanical Engineering (4456)
- Electrical Engineering (16639)
- Electronics Communications (3918)
- Chemical Engineering (1095)
- Aeronautical Engineering (239)
- Bio Engineering (96)
- Metallurgy (361)
- Industrial Engineering (259)
- Instrumentation (3014)
- Automobile Engineering (332)
- Mechatronics Engineering (97)
- Marine Engineering (124)
- Power Plant Engineering (172)
- Textile Engineering (575)
- Production Engineering (25)
- Satellite Systems Engineering (106)
- Engineering AllOther (1379)
