The formula for a simple DC voltage drop across a cable is:
VDrop = Vmeasured at the input of cable - Vmeasured at the output of cable
This formula may seem simplistic however keep in mind that the sensitivity, accuracy and resolution of measuring instrument instrument is what is really important.
If you know the DC current flowing through the cable and the impedance of the cable then you can use Ohm's law. Vdrop = I R where Vdrop is the voltage drop across the cable in volts I is the current flowing through the cable in amperes R is the resistance of the cable in ohms.
Calculation of the voltage drop is given by the formula below
Voltage Drop (Volt) = [(mV/Am)/1000] * I * l
Where mV/Am = millivolt drop per meter per ampere of the cable
(this information is given in the table based on IEE Wiring Regulation)
I = Current in the cable (in Ampere)
l = Distance of cable (in Metre)
See related links below
Since the voltage drop occurs across both conductors, we must take the resistance of both conductors in the cable into account. So, if the resistance of one conductor is R, then the total voltage drop along that cable will be:Voltage drop = I x I x 2R
sir please provided the all low voltage cable size and attached formulas
The formula to calculate cable size and voltage drop is Vdrop = current x distance times 2 times Ohms per 1000ft times 0.001.
cable sie for DC = (current x loop length x 0.019)/ voltage drop where 0.019 is conductivity of copper cable
There is insufficient information in the question to answer it. You did not provide the size (gauge) of the cable. Please restate the question.
There is actually no specific formula used to work out cable size. In order to determine the type of cable you need and the size you need, you need to know the source of the supply, the voltage of the system, the ambient temperature, and the method you plan on laying out the cable.
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.
If the voltage is supplying any current through the cable, i.e. if there is any 'load' at the end, then the voltage will drop through the cable.
It will decrease the voltage drop.
Voltage Grade of cables specifies the safe voltages which the insulation of the cable can withstand.
Cable size is based on amperage. The formula for amperage is I W/E. Amps = Watts/Volts. As you can see without a voltage given this question can not be answered.
An LT cable is a low tension (or low voltage) cable.
The voltage drop in a wire has nothing to do with the insulation. Voltage drop has to do with the cross sectional area of the wire.
cross sectional area of cable * voltage drop
The question makes no sense. A cable cannot have volts in it. Voltage is measured across an element. I assume that you are asking what the voltage between the signal lines and the answer is dependent on what you are connected to. Gigabit ethernet is one level, 10/100 is another and so on.
For appliances that need a lot of power, the advantage of a higher voltage is that less current is needed, because power = voltage x current. That means that the cable doesn't need to be so thick. It also means that for a given percentage of voltage drop in the cable, the allowable volt-drop in the cable is higher when the supply voltage is higher. This also allows the use of a thinner cable especially when the cable is 100 ft long or more.
The voltage is always determined by the device. (in this case a slow cooker).However, having established what voltage to supply to the device, the cable must be suitable for the voltage used. Everything in the chain of power transmission, must be rated for the correct voltage. Cables, plugs, fuses etc.
A: ANY CABLE will have a definite impedance and if current flow there is going to be a definite voltage drop because of it
You will need a voltmeter. Hook the red cable to the + post and the black cable to the - post and it will show the voltage.
To do a voltage drop and cable size calculation, need to know what the voltage is.
The difference between low voltage and high voltage for the same size cable is that cable size affects current carrying capacity, while power is voltage times current. As a result, the same size cable can transfer more power at high voltage than at low voltage. This is why utility power transmission and distribution systems use high voltage. A typical transmission voltage in the US might be 69 kv, 138 kv, even 345 kv, and a typical distribution voltage in the US might by 13.2 kv.
The voltage drop depends on the current through the cable.For DC current in cable of 16 mm diameter, at 68Â° F, the voltage drop is(0.00857) x (current, Amperes) volts.
The radius of the curve of the inner edge of the bends shall be at least 6 times the external diameter of the armoured cable. For low voltage cable, 10.5 times the diameter of the cable. For high voltage cable, 18 times the diameter of the cable.
Why is use the triangle system in high voltage cables
The test equipment used to test high voltage cables is a hi-pot test where a high DC voltage is a applied to the cable. This voltage can be from 150% to 200% of the working voltage of the cable.See related links below.