You should use the finest magnet wire with many multiple strands or LITZ WIRE to improve L/R time constant and peak current for lowest loss cable. Your discharge rise time will then drop to xx picoseconds. But for conductor pairs use twisted pair Litz wire to reduce CM emissions.
Otherwise, you can jam many radios/mobiles with high rep rates of > 1pps affecting AGC. !!
In most conductors R(f) rises fast and L(f) drops slow from skin effect. This R effect increases more with iron content since it is from Eddy Currents. In DSL and cable modem skin effects change Zo, phase shift and group delay.... Tony
ref wiki
Although the geometry is different, a twisted pair used in telephone lines is similarly affected: at higher frequencies the inductance decreases by more than 20% as can be seen in the following table.
Characteristics of telephone cable as a function of frequency
Representative parameter data for 24 gauge PIC telephone cable at 21 °C (70 °F).
(Hz) R (Ω/km) L (mH/km) G (μS/km) C (nF/km)
1 172.24 0.6129 0.000 51.57
1k 172.28 0.6125 0.072 51.57
10k 172.70 0.6099 0.531 51.57
100k 191.63 0.5807 3.327 51.57
1M 463.59 0.5062 29.111 51.57
2M 643.14 0.4862 53.205 51.57
5M 999.41 0.4675 118.074 51.57
The spectrum of your pulse is not at all like a square wave, since it is not repetitive over a small interval. It is a continuous spectrum rolling off similar to The null of 2nd harmonics of the equivalent pulse of a "square" wave and then rolling off above the 0.35Tr rise time. So resonant frequency and group delay calculations of pulses is very poor and affected by skin effects, even in controlled impedances, making Baseband communication much worse than the discrete equalized channel's of a modem for thruput in bps/Hz .....Tony
However hollow copper tubing with interior flash gold plating works wonders in microwave as does ENIG on stripline and gold-plated aluminum cases for RF circuits and enclosures for microwave. I saw this in '77.
Here is a different skin effect from UV on dielectrics (human skin) and how Sodium Bicarbonate helps prevent cancer. ( also reduce causes/reactions of itching). https://www.cancertutor.com/simoncini/. :):)
The skin effect is the effective reduction in the cross sectional area of a conductor that carries high frequency AC. The current density is higher on the outside of the conductor than it is an the inside. The actual resistivity of the conductor is still uniform throughout.
Its essentially an example of back emf which is strongest in the middle of the wire produced by the changing magnetic field of the AC.
see http://en.wikipedia.org/wiki/Skin_effect
Best Answer
Short answer
no. Skin Effect is fully explained by the linear model of Maxwell's equation, so different frequencies can be considered independently.
Also
at 50 Hz, your skin depth is about 9mm; far thicker than your conductor is (makes sense, right? Otherwise we wouldn't be using massive copper for power distribution!).
Long answer
Skin depth being non-zero is due to non-ideality of your conductor. Of course, if you heat up a metal, it changes conductivity / resistance.
In your case, 6mm² carrying a maximum sum current of 35 A: Ignore. Your cable has about 2.4 mΩ resistance per 1m of length; P=I²·R~=10³ A² · 2.4·10⁻³ Ω = 2.4 W. Getting rid of 2.4 W of heat over 1 m of length: will happen by itself.
With the three currents at the right frequencies, we can even be specific:
Things get worse in nonlinear materials, but I'm pretty optimistic that your copper conductor is linear enough.