Àwọn Ìṣàmúlò-ètò

Àwọn àwọn ìṣàmúlò-ètò àwọn ìṣàmúlò-ètò àwọn

Àwọn Ìjánu-ìṣàmúlò-ètò

Ìgbà ìjánu-ìjánu

Àwọn Ìjánu-ìsún

Ààyè Àwọn Àkọ́kọ́

mm²

Àwọn ìṣàmúlò-ètò

Àwọn ìṣàmúlò-ètò ? Yan àwọn ìṣàmúlò-ètò ìṣàmúlò-ètò láti pa ààyè náà.

Àwọn Ìṣàmúlò-ètò

Àwọn ìṣàmúlò-ètò àìdá

Ìjádé Voltígì —

_Gba —

Voltage nínú ààyè-iṣẹ́ (V) —

Power lost (W) —

Àwọn Ìṣàmúlò-ètò —

Àwọn Àtòjọ-ẹ̀yàn àwọn ìṣàmúlò-ètò

Ńlà àwọn àwọn ààtò àtòjọ-ẹ̀yàn yìí?

Àkóónú ìṣàmúlò-ètò yìí

Every conductor has some resistance, so a little voltage is always lost pushing current along a cable — that loss is the voltage drop. For a single-phase run the drop is Vdrop = 2 × ρ × L × I / A, where the factor 2 accounts for the current travelling out to the load and back along the return conductor; a three-phase run uses √3 instead of 2. Here ρ is the resistivity of the metal (copper ≈ 0.0175 Ω·mm²/m, aluminium ≈ 0.0282 Ω·mm²/m), L is the one-way length in metres, I the load current in amps and A the conductor cross-section in mm². This calculator also reports the resulting percentage drop, the voltage actually delivered at the load and the power wasted as heat in the cable (Ploss = Vdrop × I).

As a worked example, take 20 A flowing 50 m one-way through a 10 mm² copper cable on a 230 V single-phase supply: Vdrop = 2 × 0.0175 × 50 × 20 / 10 = 3.5 V, about 1.5%, so the load sees roughly 226.5 V and the cable wastes 3.5 × 20 = 70 W. Switch the conductor to aluminium and the same run drops about 5.6 V, because aluminium’s resistivity is around 60% higher. You can either type a custom cross-section or pick a standard AWG gauge from the advanced list, which overrides the area field with the gauge’s real mm² value.

Voltage drop matters because motors, lights and electronics misbehave when they are starved of voltage — dim lamps, sluggish motors and nuisance tripping all trace back to oversized drops on long runs. Electricians size cables so total drop stays within about 3% for branch circuits and 5% end-to-end; the result here flags whether your run meets the limit you set, and the fix for a failing run is a larger conductor, a shorter route or, occasionally, a higher supply voltage.

Àwọn Àtòjọ-ẹ̀yàn

Bawo ní a ṣe lè ṣé ìṣàmúlò-ètò ìṣàmúlò-ètò?

Fun faaji kan, Vdrop = 2 × ρ × L × I / A. Faaji 2 jẹ fun awọn iroyin ti o wa ni ayika ati pada; faaji mẹta lo √3 ni ibẹrẹ 2.

Ìgbà wo nínú àwọn ààyè-iṣẹ́ náà?

Àwọn àwọn ìṣẹ̀dà tí a lò nípa ìgbàdá gbogbó nínú 3% fún àwọn sàítìrítì àwọn ẹ̀yàn àti 5% nípa gbogbó. Àwọn àkọ́kọ́lú tí o jú jú (àwọn ààyè tí o jú jú) tí wọ́n mú ìgbàdá náà.

Copper tabi aluminium — ò jẹ́ àwọn ààyè?

Ya. Aluminum ní àwọn ìṣàfarawé àwọn ìṣàmúlò-ètò tí a fi pamọ́ nínú àwọn à

Kini idi tí ìṣàmúlò-ètò náà fi ló ìgbà mejì nínú ìjánu-ìṣàmúlò-ètò náà?

Ò yẹ kí ìgbàyàn náà lọ́wọ́lọ́wọ́, bẹ́ẹ̀ nínú sírkítì fáà kan náà wó àwọn conductors meji náà - bẹ́ẹ̀ nínú fáàtì 2 × ìgbàyàn. Sírkítì fáà mẹ́ta náà náà lo √3 (nípa 1.732) nígbà, tí o bá jẹ́ pé a tí ìṣàfilọ́lẹ̀ àwọn à

Bawo ni mo ṣe lè yọ́kúnú ìgbàdá àwọn ìṣàfarawé àwọn ìṣàmúlò-ètò?

Ló aagó nla kan (àwọn ààyè-ìwé tí a fi pọ̀ jú nínú àwọn ààyè-ìwé náà), fi àwọn ààyè-ìwé kù, fi àwọn ààyè-ìmúdárà pamọ́ lọ́wọ́lọ́wọ́, tàbí fi àwọn ààyè-ìwé pamọ́ lọ́wọ́lọ́wọ́. Aagó nla kan ní pàtó nitori àwọn ààyè-ìwé náà ní pàtó nínú àwọn ààyè-ìwé.

Ìgbà wo nínú àwọn káàdí ìmúdárà náà tí a tìpàdé?

A 3.5 V drop at 20 A wastes 70 W as heat in the wire — energy you pay for but never use, which is why long high-current runs justify thicker, lower-loss cable.

Ń lè ló àwọn ààyè-iṣẹ́ AWG láti fi àwọn ààyè-iṣẹ́ mm² pamọ́?

Ya. Yan àwọn ìṣàmúlò-ètò nínú àtòjọ AWG tí a tí ìdáràn tí o si gbọ́dọ̀ ààyè-iṣẹ́ náà láti inú àwọn ààyè-iṣẹ́ náà nínú mm² (gẹ́gẹ́ bíi 10 AWG ≈ 5.26 mm²), láti sé lè ṣiṣẹ́ nínú àwọn ìṣàmúlò-ètò North American tí a lò.

API — ló àwọn ìṣàmúlò-ètò yìí láti inú ìṣàmúlò-ètò

Fi àwọn ìṣàmúlò-ètò yìí kọ̀ǹpútà yìí láti jẹ́ ààyè-iṣẹ́ JSON tí a tí fi pamọ́ - kò ní bọ́tìnì kan tí a fẹ́. Fi àwọn fálù ààyè-iṣẹ́ sílẹ̀ sí bí àwọn àwọn ìṣàmúlò-ètò àti JSON. Anything you omit uses the same default this page is pre-filled with; an unknown parameter is a 400, never a silent zero. Ka àwọn àkọlé API kíkún →

Àwọn Ààyè Ìjánu-ìṣàmúlò-ètò

GET https://calculator.free/api/v1/voltage-drop/

curl

curl "https://calculator.free/api/v1/voltage-drop/?material=copper&length=50&current=20&area=10&source=230"

JavaScript `fetch()`

const r = await fetch(
  "https://calculator.free/api/v1/voltage-drop/?" + new URLSearchParams({
    "material": "copper",
    "length": "50",
    "current": "20",
    "area": "10",
    "source": "230"
  }));
const data = await r.json();
console.log(data.results);

Results are estimates for general guidance only, not financial, medical or tax advice.

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