Contents
What is the K factor for copper?
| Table | Material | K factor |
|---|---|---|
| table 1 | soft brass, copper | 0.35 |
| table 2 | hard brass, copper, soft steel, aluminum | 0.41 |
| table 3 | hard copper, bronze, cold rolled steel, spring steel | 0.45 |
How do you find the current in copper wire?
A copper wire has a length of 160 m and a diameter of 1.00 mm. If the wire is connected to a 1.5-volt battery, how much current flows through the wire? The current can be found from Ohm’s Law, V = IR. The V is the battery voltage, so if R can be determined then the current can be calculated.
How do you find the K factor of a copper conductor?
Answer: K is the resistance of a circular mil foot of a conductor. The exact K factor is equal to: K = kFTR x CM ÷ 1000. To find the exact K for a 4/0 AWG copper conductor you go to Chapter 9, Table 8 and find the dc resistance per kFT (1000 ft) at 75º C for a 4/0 AWG uncoated copper conductor.
What is K factor in cable?
THE “K” FACTOR TABLE gives voltage drop per 1000 ampere-metres for wire in magnetic (steel) or non-magnetic (e.g. aluminum, PVC, etc.) conduits. K Factors are calculated for 60–75°C wire temperature since this is an estimate of the average temperature at which a circuit operates in service.
How do you find the maximum current of a wire?
How is current carrying capacity calculated?
- The formula for calculating current carrying capacity is:
- I = permissible current rating.
- ∆Φ = Conductor temperature rise in (K)
- R= Alternating current resistance per unit length of the conductor at maximum operating temperature (Ω/m)
How do you find the K value of a wire?
“K” = Direct Current Constant: This is a constant representing the direct current resistance for a 1000 circular mils conductor that’s 1000 ft long, at an operating temperature of 75°C. The direct current constant value you should use for copper is 12.9 ohms and 21.2 ohms for aluminum conductors.
What is cable constant?
Impedance – Cable constants calculation is an easy-to-use tool for positive and zero sequence impedance calculations. It uses the user-friendly graphical interface of the cable editor and the complete ETAP cable library. The calculation considers cable configuration, installation and operating conditions.