How do you calculate resistance of a cable?
Specific Resistance (”ρ”) is a property of any conductive material, a figure used to determine the end-to-end resistance of a conductor given length and area in this formula: R = ρl/A. Specific resistance for materials are given in units of Ω-cmil/ft or Ω-meters (metric).
What size is 10mm2 cable?
CABLE WEIGHT & OVERALL DIMENSIONS
| Nominal Overall Diameter mm | Approx Weight Kg/100mt | |
|---|---|---|
| 4+E | 16.2 | 46 |
| 10mm2 7/1.35 | ||
| 2+E | 16.5 | 45 |
| 3+E | 18.1 | 57 |
How much current can 16mm carry?
The swa cable is 3-core. The house is occupied by an elderly lady who wouldn’t use any equipment with a big load. I was of thinking of using 16mm because the consumer unit is the kitchen and it would be easier to conceal than 25mm and 16mm is able to handle up to 94A.
How can the resistance of a cable be reduced?
Changing the material, increasing the cross section area, lowering the temperature, and using a thicker wire are some of the ways to reduce resistance.
What is the resistance of 6mm 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) |
| 6.0 | 3.08 |
| 10.0 | 1.83 |
| 16.0 | 1.15 |
What is the resistance of a cable?
Resistance describes how strongly a given cable opposes the flow of an electric current, and conductance measures a wire’s ability to conduct it. There are also two physical quantities associated with them – electrical resistivity and electrical conductivity.
What does 10mm2 cable mean?
It means that the total cross-sectional area of the strands in one core is 10 sq mm.
What size cable do I need for 80 amps?
80-amp service requires a 2-gauge wire. If you exceed 80 amps, you should jump to 1 gauge. The next size after 1-gauge is 2/0, followed by 3/0. It should be noted that you can only use 2 or even 3-gauge wire if the material is copper.
Can 16mm tails carry 80A?
I agree with OMS 16mm tails are fine for a 80A incomer. Taking diversity into account 80A is more than enough for most size houses. even if you switched everything on for a few hours I’m still sure the fuse wouldn’t blow! The fuse is suiltable for the cable so theres no problem.
What causes high resistance in a cable?
High resistance connections are typically caused by a defect in workmanship, with the failure to tighten connections the most common. The failure to align multiple conductors mated with a twist on connector such as a wire nut is another common cause.
Which is a better metal to use for less resistance in a wire?
Copper is a better conductor than iron, which means current can flow easier (with less resistance) through copper. This is an inherent property of a material.