How do you calculate resistance of a cable?
How do you calculate resistance of a cable?
CALCULATION OF CABLE RESISTANCE
- Hence R = 22.5/10 = 2.25 Ohms per km.
- Length of conductor = 500m =500/1000 = 0.5km.
- Therefore resistance of copper conductor = 2.25 x 0.5 =1.125 Ohms. Similarly for Aluminium,
- R = 36/S(c.s.a)
- Again S = 10mmsq.
- Hence R = 36/10 = 3.6 Ohms per km.
- Length of conductor = 0.5km.
What is the AC resistance of 500 ft of 1000 Kcmil aluminum wire?
Explanation. For 1000 kcmil wire made by aluminum place inside a steel conduit, the ac resistance is 0.025 Ω 1000 ft \frac{0.025\text{ }\Omega }{1000\text{ ft}} 1000 ft0.025 Ω. For 500 ft of wire the ac resistance is calculated by taking the product of ac resistance for 1000 feet which is.
How do you find the DC resistance of a wire?
In DC Circuits, we calculate the resistance by Ohm’s Law. R = V/I.
What is the resistance of the copper wire in ohms?
Electrical resistance in plain copper or aluminum wires.
| Cross Sectional Area (mm2) | Resistance (ohm/km) | |
|---|---|---|
| Copper | Aluminum | |
| 1.0 | 17.2 | 26.5 |
| 1.5 | 11.5 | 17.7 |
| 2.5 | 6.9 | 10.6 |
What is the normal resistance of the cable?
Common Wire Gauges
| AWG wire size (solid) | Diameter (inches) | Resistance per 1000 ft (ohms) |
|---|---|---|
| 16 | 0.0508 | 4.016 |
| 14 | 0.0640 | 2.525 |
| 12 | 0.0808 | 1.588 |
| 10 | 0.1019 | 0.999 |
What is the resistance of 1000 feet of #6 aluminum?
Wire Resistance & Properties (AWG & Metric)
| AWG | Stranding | D.C. Resistance (Ohms/1000 feet) |
|---|---|---|
| Aluminum | ||
| 10 | solid | – |
| 8 | solid | – |
| 6 | 7 | 0.808 |
What is the resistance of 1000 feet of No 14 copper wire?
2.53 ohms
Consider this: One thousand feet of 14 AWG solid wiring has a resistance of 2.53 ohms. The same length of 12 AWG has a resistance of 1.59 ohms.
What is DC resistance of cable?
The DC resistance of a conductor or cable is that defined by ohms law. It is a function of many factors including temperature which greatly affects the resistance of a given material. Copper and Aluminium are the most widely used conductors. Their resistance (DC) increases with increasing temperature.
How many ohms of resistance does 1000 ft No 10 copper wire have?
AWG Wire Sizes and Resistance
| AWG gauge | Conductor Diameter Inches | Ohms per 1000 ft. |
|---|---|---|
| 7 | 0.1443 | 0.4982 |
| 8 | 0.1285 | 0.6282 |
| 9 | 0.1144 | 0.7921 |
| 10 | 0.1019 | 0.9989 |
How many ohms should a good wire have?
According to the NEC (National Electrical Code), an electrical resistance reading of less than 5 ohms is a good ground reading.
Do longer wires have more resistance?
First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be. When all other variables are the same, charge will flow at higher rates through wider wires with greater cross-sectional areas than through thinner wires.
What are the allowable ampacities for medium voltage cables?
Allowable Ampacities: For cable sizing, base Medium voltage cables Amps on NEC Table 310.60 (C) (73) Ampacities of an Insulated Triplexed or Three Single Conductor Copper Cables in Isolated Conduit in Air Based on Conductor Temperatures of 90°C (194°F) and 105°C and (221°F) and Ambient Air Temperature of 40°C (104°C).
What is the size of a cable cable?
Cable Manufacturing Specifications. Size: 1500 MCM / 1500 KCMIL [ 1500 MCM/KCMIL to MM2 = 760 MM Metric ] Conductor / Pair Count: 1C. Conductor Material: Annealed bare copper compact Class B strand (127 strand) Ground: 1 bare grounding conductor may be in contact with metallic shielding tape
What sizes of DC traction power cable do we produce?
We produce the BIG sizes of DC Traction Power Cable such as 1000 MCM, 1250 MCM, 1500 MCM, 1750 MCM, 2000 MCM, 2250 MCM, 2500 MCM, 2750 MCM, 3000 MCM up to 6000 KCMIL. The standard Traction Power cable or Traction Power Wire is 600V and 2kV, but we can produce as 5kV, 15kV, 25kV, 35kV up to 550kV depending on your project scope.
How do you calculate ohms per meter?
Engineers often ask how to calculate the resistance of a cable, there is a very simple formula that works well within an ohm or so with copper cable. 19 ÷ by 2.5mm² will give you 7.6 ohms per km. ÷ by 1000 for resistance per meter.
How do I calculate cable size needed?
Divide the voltage running through the cable by your target current. If, for instance, 120 volts will act on the cable, and you want 30 amps to run through it: 120 / 30 = 4. This is your target resistance, measured in ohms. 30,000 x 1.724 x 10^-8 = 0.0005172 ohm sq.
How do you calculate cable reactance?
Inductive reactance XL equals 2π times the product of the frequency of the current and the inductance of the conductor, simply XL = 2πfL. Inductive reactance is expressed in ohms. (The unit of frequency is hertz, and that of inductance is henry.)
How much resistance is in a wire?
What is the resistance of the wire?
The ohm is the common unit of electrical resistance, equivalent to one volt per ampere and represented by the capital Greek letter omega, Ω. The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Resistance also depends on the material of the conductor.
What size cable do I need for 32 amps?
An armored 6mm cable direct in the ground is rated 44A. So in term of your 32A supply the 6mm cable is absolutely fine.
What is the resistance formula?
If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm’s Law: R = V / I. For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance RT = 9 volts / 3 amps = 3 Ω.
What is the resistance of 2.5 mm cable?
| Table 5.5 – Resistance per metre of copper conductors at 20°C for calculation of R1 + R2 | |
|---|---|
| Conductor cross-sectional area (mm²) | Resistance per metre run (m ohms / m) |
| 1.5 | 12.10 |
| 2.5 | 7.41 |
| 4.0 | 4.61 |
What is the weight of a 350 MCM wire?
350 MCM: Wire Type: THHN / THWN-2 / MTW: Product Weight: 586.35 UOM: package of 500 Catalog Page: BBV11, Page 10-3
What is a wire resistance calculator used for?
This wire resistance calculator can quickly compute electrical properties of a specific wire – its resistance and conductance. Resistance describes how strongly a given cable opposes the flow of an electric current, and conductance measures a wire’s ability to conduct it.
What is the meaning of MCM in wire?
MCM is an abbreviation for thousands of circular mils, an old measurement of wire gauge. 1 MCM = 1 kcmil = 0.5067 square milimeters. A mil is 1/1000 inch. A wire 200 mils in diameter is 40 MCM. Click to see full answer
What is 500 mcm wire gauge?
Thousand circular mils or kcmil, the wire gauge is equivalent cross sectional area (500 MCM = 500,000 circular mils) Million cubic metre, the unit of volume. Beside above, what diameter is 500 mcm cable? Subsequently, one may also ask, what size is 250 MCM wire?
