take the full load current
1.732*415*I*0.85*efficiency=115*1000 => I?
Depending on the value of the full load current and designed and ambient temperatures of the selected category of the cables, and voltage drop per unit length, you can determine the cable size
you can calculate a meter by using maybe a meter stick or a tape measure...
To find the length of cable that weighs 5.12 kilograms, you can set up a proportion. Since 1 meter of cable weighs 751000 kilograms, you can calculate the length of cable that weighs 5.12 kilograms by cross-multiplying in the proportion (1 meter / 751000 kilograms) = (x meters / 5.12 kilograms). Solving for x, you get approximately 0.0068 meters.
To calculate voltage drop to size the wire, a voltage must be stated.
If I consider power factor is 0.85 & motor efficiency is 95% then you have required 4 sq mm wire which is able allow passing 25.47 A current trough it.
you can calculate a meter by using maybe a meter stick or a tape measure...
To calculate the mass per meter of a 300 sq mm copper cable, first determine the volume using the cross-sectional area and the density of copper. The density of copper is approximately 8,960 kg/m³. Thus, the mass per meter can be calculated as: Mass per meter = Cross-sectional area (m²) × Density (kg/m³). For a 300 sq mm cable (which is 300 x 10^-6 m²), the mass per meter is approximately 2.688 kg/m.
to calculate the cable size of a run of 30 meters long you first will have to know the current of the appliance use the voltage drop formula V d = (mVxIxL)/1000 once the voltage drop is less than 2.5% of the nominal voltage, the cable should be upsize.
find your electric Meter and you've found the point of entry, or depending on where the electric meter is in the building, you can trace the cable back from the meter to the point of entry.
You could use a very sensitive Ohm Meter or you could get a longer piece, such as 100 m, measure with an Ohm Meter and divide by 100. The problem is that the resistance of 1 meter length will be very low and it would be hard to get a reading other than zero from most Ohm Meters.
if tank hight is 7mtr and dia is 8mtrs how i will calculate in cubic meter
One inch is 2.54cm and 100cm is one meter.
1000litre