Voltage Drop Calculator


Voltage Drop Calculator

Voltage Drop Calculator

Wire / cable voltage drop calculator and how to calculate.

Wire type:  
Resistivity: Ω·m
Wire diameter size:
Wire/cable length (one way):
Current type:
Voltage in volts: V
Current in amps: A
 
Voltage drop in volts: V
Percentage of voltage drop: %
Wire resistance: Ω

* @ 68°F or 20°C

** Results may change with real wires: different resistivity of material and number of strands in wire.

*** For wire length of 2x10ft, wire length should be 10ft.

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Voltage drop calculations

DC / single phase calculation

The voltage drop V in volts (V) is equal to the wire current I in amps (A) times 2 times one way wire length L in feet (ft) times the wire resistance per 1000 feet R in ohms (Ω/kft) divided by 1000:

Vdrop (V) = Iwire (A) × Rwire(Ω)

= Iwire (A) × (2 × L(ft) × Rwire(Ω/kft) / 1000(ft/kft))

The voltage drop V in volts (V) is equal to the wire current I in amps (A) times 2 times one way wire length L in meters (m) times the wire resistance per 1000 meters R in ohms (Ω/km) divided by 1000:

Vdrop (V) = Iwire (A) × Rwire(Ω)

= Iwire (A) × (2 × L(m) × Rwire (Ω/km) / 1000(m/km))

3 phase calculation

The line to line voltage drop V in volts (V) is equal to square root of 3 times the wire current I in amps (A) times one way wire length L in feet (ft) times the wire resistance per 1000 feet R in ohms (Ω/kft) divided by 1000:

Vdrop (V) = √3 × Iwire (A) × Rwire (Ω)

= 1.732 × Iwire (A) × (L(ft) × Rwire (Ω/kft) / 1000(ft/kft))

The line to line voltage drop V in volts (V) is equal to square root of 3 times the wire current I in amps (A) times one way wire length L in meters (m) times the wire resistance per 1000 meters R in ohms (Ω/km) divided by 1000:

Vdrop (V) = √3 × Iwire (A) × Rwire (Ω)

= 1.732 × Iwire (A) × (L(m) × Rwire (Ω/km) / 1000(m/km))

Wire diameter calculations

The n gauge wire diameter dn in inches (in) is equal to 0.005in times 92 raised to the power of 36 minus gauge number n, divided by 39:

dn (in) = 0.005 in × 92(36-n)/39

The n gauge wire diameter dn in millimeters (mm) is equal to 0.127mm times 92 raised to the power of 36 minus gauge number n, divided by 39:

dn (mm) = 0.127 mm × 92(36-n)/39

Wire cross sectional area calculations

The n gauge wire's cross sercional area An in kilo-circular mils (kcmil) is equal to 1000 times the square wire diameter d in inches (in):

An (kcmil) = 1000×dn2 = 0.025 in2 × 92(36-n)/19.5

The n gauge wire's cross sercional area An in square inches (in2) is equal to pi divided by 4 times the square wire diameter d in inches (in):

An (in2) = (π/4)×dn2 = 0.000019635 in2 × 92(36-n)/19.5

The n gauge wire's cross sercional area An in square millimeters (mm2) is equal to pi divided by 4 times the square wire diameter d in millimeters (mm):

An (mm2) = (π/4)×dn2 = 0.012668 mm2 × 92(36-n)/19.5

Wire resistance calculations

The n gauge wire resistance R in ohms per kilofeet (Ω/kft) is equal to 0.3048×1000000000 times the wire's resistivity ρ in ohm-meters (Ω·m) divided by 25.42 times the cross sectional area An in square inches (in2):

Rn (Ω/kft) = 0.3048 × 109 × ρ(Ω·m) / (25.42 × An (in2))

The n gauge wire resistance R in ohms per kilometer (Ω/km) is equal to 1000000000 times the wire's resistivity ρ in ohm-meters (Ω·m) divided by the cross sectional area An in square millimeters (mm2):

Rn (Ω/km) = 109 × ρ(Ω·m) / An (mm2)

AWG chart

AWG # Diameter
(inch)
Diameter
(mm)
Area
(kcmil)
Area
(mm2)
0000 (4/0) 0.4600 11.6840 211.6000 107.2193
000 (3/0) 0.4096 10.4049 167.8064 85.0288
00 (2/0) 0.3648 9.2658 133.0765 67.4309
0 (1/0) 0.3249 8.2515 105.5345 53.4751
1 0.2893 7.3481 83.6927 42.4077
2 0.2576 6.5437 66.3713 33.6308
3 0.2294 5.8273 52.6348 26.6705
4 0.2043 5.1894 41.7413 21.1506
5 0.1819 4.6213 33.1024 16.7732
6 0.1620 4.1154 26.2514 13.3018
7 0.1443 3.6649 20.8183 10.5488
8 0.1285 3.2636 16.5097 8.3656
9 0.1144 2.9064 13.0927 6.6342
10 0.1019 2.5882 10.3830 5.2612
11 0.0907 2.3048 8.2341 4.1723
12 0.0808 2.0525 6.5299 3.3088
13 0.0720 1.8278 5.1785 2.6240
14 0.0641 1.6277 4.1067 2.0809
15 0.0571 1.4495 3.2568 1.6502
16 0.0508 1.2908 2.5827 1.3087
17 0.0453 1.1495 2.0482 1.0378
18 0.0403 1.0237 1.6243 0.8230
19 0.0359 0.9116 1.2881 0.6527
20 0.0320 0.8118 1.0215 0.5176
21 0.0285 0.7229 0.8101 0.4105
22 0.0253 0.6438 0.6424 0.3255
23 0.0226 0.5733 0.5095 0.2582
24 0.0201 0.5106 0.4040 0.2047
25 0.0179 0.4547 0.3204 0.1624
26 0.0159 0.4049 0.2541 0.1288
27 0.0142 0.3606 0.2015 0.1021
28 0.0126 0.3211 0.1598 0.0810
29 0.0113 0.2859 0.1267 0.0642
30 0.0100 0.2546 0.1005 0.0509
31 0.0089 0.2268 0.0797 0.0404
32 0.0080 0.2019 0.0632 0.0320
33 0.0071 0.1798 0.0501 0.0254
34 0.0063 0.1601 0.0398 0.0201
35 0.0056 0.1426 0.0315 0.0160
36 0.0050 0.1270 0.0250 0.0127
37 0.0045 0.1131 0.0198 0.0100
38 0.0040 0.1007 0.0157 0.0080
39 0.0035 0.0897 0.0125 0.0063
40 0.0031 0.0799 0.0099 0.0050

 


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Voltage Drop Calculator


A Voltage Drop Number cruncher is an important instrument for electrical specialists, electrical experts, and anybody working with electrical frameworks. This number cruncher decides the voltage drop across electrical conduits because of opposition and different variables. Working out voltage drop is essential for keeping up with the proficiency and security of electrical frameworks, as exorbitant voltage drop can prompt power misfortune, hardware breakdown, or even perils. By entering factors, for example, wire size, distance, current, and material, clients can rapidly and precisely find the normal voltage drop in their circuit.


Understanding Voltage Drop


Voltage drop happens when the voltage diminishes as electrical flow courses through a conduit because of the conveyor's intrinsic obstruction. This peculiarity is especially critical over significant distances or with more modest check wires, where the opposition is higher. Unreasonable voltage drop can prompt diminished execution in electrical gadgets, warming of wires, or even harm to delicate hardware. Working out voltage drop considers better circuit configuration, guaranteeing that all gadgets get adequate voltage and work securely.


How to Utilize the Voltage Drop Calculator


Utilizing the Voltage Drop Adding machine is clear and open for clients with changing degrees of specialized mastery. This is the way to begin:


  1. Select Wire Material:
    Pick the conveyor material, like copper or aluminum. Copper has lower opposition and is by and large liked for most applications.

  2. Enter Wire Size:
    Input the wire check or size in American Wire Measure (AWG) or other material units. The wire size straightforwardly influences the obstruction and, thusly, the voltage drop.

  3. Specify Distance:
    Enter the length of the wire from the power source to the heap. Longer distances increment the voltage drop due to higher resistance.

  4. Input Current:
    Give the current (in amps) coursing through the guide. Higher flows add to more prominent voltage drop.

  5. Calculate:
    Click the work out button to get the voltage drop result alongside extra qualities, for example, the rate drop and the changed voltage at the load.


Benefits of Utilizing a Voltage Drop Calculator


A Voltage Drop Number cruncher offers a few advantages that make it a fundamental device for electrical work:



Features of Our Voltage Drop Calculator


Our Voltage Drop Adding machine gives highlights customized to make electrical computations quick, precise, and open:



Example Computation with the Voltage Drop Calculator


We should go through a straightforward instance of working out voltage drop for a circuit with copper wire.



Frequently Got clarification on some things (FAQs)


What is an adequate voltage drop for my circuit?
As a rule, a greatest voltage drop of 3% is OK for most circuits, however delicate gear might require even lower voltage drop.


Can I utilize this adding machine for DC and AC circuits?
Indeed, the number cruncher can be utilized for both DC and single-stage AC circuits, however the opposition and voltage drop might differ somewhat between them.


How can I say whether I want a bigger wire size?
Assuming that the voltage drop is over 3% or the heap voltage falls beneath the gear's working reach, expanding the wire size might assist with lessening the voltage drop.


Conclusion


The Voltage Drop Number cruncher is a useful asset for guaranteeing protected, proficient, and code-consistent electrical establishments. With precise outcomes in view of variables, for example, wire size, material, and distance, this mini-computer is vital for anybody working with electrical frameworks. Whether you're arranging another establishment, investigating a current framework, or upgrading power circulation, our Voltage Drop Mini-computer gives the data you want to go with informed choices. Begin utilizing our Voltage Drop Mini-computer today to smooth out your voltage drop calculations and accomplish solid outcomes in the entirety of your electrical activities.