Online Voltage Drop Calculator

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Voltage Drop Calculator

Wire / cable voltage drop calculator and how to calculate.

Voltage drop calculator

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 would possibly alternate with authentic wires: one-of-a-kind resistivity of material and quantity of strands in twine.

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

Voltage drop calculations

DC/single stage calculation

The voltage drop V in volts (V) is equal to the wire current I in amps (A) instances twice one manner twine period L in ft (ft) times the twine obstruction in keeping with 1000 toes R in ohms (Ω/kft) partitioned by means of 1000:

Vdrop (V) = Icord (A) &instances; Rwire(Ω)

= Iwire (A) × (2 &instances; L(feet) &instances; Rcord(Ω/kft)/one thousand(toes/kft))

The voltage drop V in volts (V) is equal to the cord modern-day I in amps (A) instances twice one manner wire duration L in meters (m) instances the wire obstruction per 1000 meters R in ohms (Ω/km) partitioned via a thousand:

Vdrop (V) = Iwire (A) × Rcord(Ω)

= Itwine (A) &instances; (2 &instances; L(m) × Rcord (Ω/km)/one thousand(m/km))

three degree calculation

The line to line voltage drop V in volts (V) is equivalent to rectangular base of multiple times the twine modern-day I in amps (A) times one way cord length L in ft (toes) times the twine obstruction according to 1000 ft R in ohms (Ω/kft) isolated via 1000:

Vdrop (V) = √three &instances; Icord (A) × Rtwine (Ω)

= 1.732 &instances; Iwire (A) × (L(toes) &instances; Rwire (Ω/kft)/a thousand(toes/kft))

The line to line voltage drop V in volts (V) is equal to square base of a couple of instances the twine contemporary I in amps (A) instances one manner cord length L in meters (m) instances the wire competition consistent with 1000 meters R in ohms (Ω/km) isolated via 1000:

Vdrop (V) = √three &instances; Iwire (A) × Rtwine (Ω)

= 1.732 × Icord (A) &instances; (L(m) × Rcord (Ω/km)/a thousand(m/km))

Wire measurement calculations

The n degree wire breadth dn in inches (in) is equal to zero.005in instances 92 raised to the pressure of 36 quick test variety n, separated by 39:

dn (in) = 0.1/2 in × ninety two(36-n)/39

The n check cord breadth dn in millimeters (mm) is equal to zero.127mm instances ninety two raised to the pressure of 36 less measure wide variety n, partitioned by means of 39:

dn (mm) = zero.127 mm × 92(36-n)/39

Wire go sectional region calculations

The n measure cord's pass sercional region An in kilo-round mils (kcmil) is equal to more than one times the rectangular wire width d in inches (in):

An (kcmil) = a thousand&instances;dn2 = 0.0.5 in2 &instances; 92(36-n)/19.Five

The n degree cord's go sercional region An in square inches (in2) is equal to pi separated via a couple of instances the rectangular wire width d in inches (in):

An (in2) = (π/four)×dn2 = 0.000019635 in2 &instances; 92(36-n)/19.Five

The n take a look at cord's pass sercional vicinity An in square millimeters (mm2) is equal to pi partitioned with the aid of multiple times the rectangular twine breadth d in millimeters (mm):

An (mm2) = (π/4)×dn2 = 0.012668 mm2 &instances; ninety two(36-n)/19.Five

Wire opposition calculations

The n take a look at cord opposition R in ohms according to kilofeet (Ω/kft) is equal to zero.3048×1000000000 instances the wire's resistivity ρ in ohm-meters (Ω·m) isolated by 25.42 times the move sectional area An in square inches (in2):

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

The n test wire competition R in ohms in line with kilometer (Ω/km) is equal to a couple of instances the twine's resistivity ρ in ohm-meters (Ω·m) separated with the aid of the go sectional area An in square millimeters (mm2):

Rn (Ω/km) = 109 &instances; 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

In Physical technology, the voltage drop is characterised as how lots voltage drop/misfortune happens as a piece of the circuit or through all of the circuit because of the impedance. Generally, the voltage drop happens due to the extended opposition in the circuit. Different motives for voltage drop might be due to additional components, institutions or the high-opposition publications, accelerated load, and many others.

It is a alternate mini-pc used to exchange over the characteristics in Standard cord measure (SWG) to millimeters (mm) and rectangular millimeters (mm2). It is easy to apply as it simply has a solitary text subject where you'll pick out the measure wide variety. Click the down bolt at the right 1/2 of the 'select SWG' to give you the choices. Whenever you have got picked the appropriate well worth, click on the 'Ascertain' button to execute the conversion.

This range cruncher likewise has the 'Reset' button which contains out an exchange position. Deleting all statistics of the past calculations is utilized. It is the fastest method to clearing the textual content fields at whatever factor you want to carry out new adjustments. The results can be shown underneath the two controls. You can decide the Measurement in millimeters, Breadth in inches and the Cross sectional region in square millimeters.

Recipe of running out the cord move sectional area An (mm2) = (∏/four) x dn2, and that implies that the n take a look at twine's go sectional area in rectangular millimeters is registered via duplicating the square cord measurement in millimeters through pi partitioned with the aid of four.

For example,

Assuming that the Standard cord degree is forty seven (SWG), what are the Breadth in millimeters, square millimeters and inches?

Solution

The foremost method can be to choose the take a look at range 47 within the number one textual content discipline. Click the Work out button to execute a rapid alternate. Your results may be shown as;

Measurement in millimeters = zero.051 (mm)

Measurement in Inches = zero.002 (inches)

Cross sectional area in rectangular millimeters = 0.0020 (mm2)

On the off threat that you desire to finish new changes from SWG to mm, make use of the 'Reset' button to clean the textual content fields at the double. You can then pick out the take a look at wide variety and perform a similar method to advantage your results in millimeters, inches and rectangular millimeters. It is additionally important to understand that this number cruncher simply arrangements with adjustments from SWG to mm and no longer the alternative. You can continuously arrange the 2 controls to play out a few computations inside a short length.