difference in wires?

[jeff262]

i was just curious as to what advantages there is to using stranded wires versus solid copper other then flex? i was planning on using 22 gauge radio shack coated wire to extend my 10 amp brushless leads, yes i know your not supposed to but it is the only way. is there a peoplem with using solid wire?
thanks jeff

[jeffs555]

Other than flexing and breaking, solid is not a problem, but 22ga is kind of small for 10 amps. A one foot 22ga extension at 10 amps will waste over 3 watts of power.

[vintage1]

The only reason for flex is flex.

Fixed wiring is usually done in solid.

[Miami Mike]

A one foot 22ga extension at 10 amps will waste over 3 watts of power.That's true. More specifically, I get 3.36 watts.

Or is it? Hmm...

If we're talking about the 3 wires between the ESC and a brushless motor here, then I don't know.

Oh well, no time now, gotta go to to work.


.

[Pook]

Hmm.. I have some vague recollection that stranded wire was better due to its greater surface area.... Am i going crazy ? of course i could be thinking of something completely diffrent. :) Its a long time since I studied electronics.

Piers

[Mr.RC-CAM]

I have some vague recollection that stranded wire was better due to its greater surface area...Surface area counts at RF frequencies due to the skin effect. No such advantage is expected when powering a BL motor.

Skin Effect math: http://www.allaboutcircuits.com/vol_2/chpt_3/6.html

RC-CAM

[Pook]

Ahh thanks RC... at least i didnt imagine the whole thing :)

Piers

[vintage1]

..and even skin efect is somewhat arguable...at least I've seen it argued.

Of course if its loudspeaker HiFi cables,everyine knowns that only expensive gold plated multi stranded wire wound in different directions will reduce the impedance to zero at frequencies up into the GHz band, which is apparently where hifi buffs can hear those tiny differences which make one bit of wire infinitely superior to another.

Despite the fact that their pickups at best are capable of 40Khz frequency, and their CD's must have sharo cutoffs in the 20Khz region...

Ther waas a great SApril Fool joke in wireless world years ago.

The Radical ASPOW circuit, guaranteed ruler flat from DC 20Hz- 20MHz, immeasurable distortion etc etc.

ASPOW standing for A Straight Piece Of Wire.

[KillerWatt]

For the same gauge, stranded (and the more # of fine strands, the better) wire has slightly less resistance and less associated voltage drop, for some reason....flex not involved........ kw

[Mr.RC-CAM]

For the same gauge, stranded (and the more # of fine strands, the better) wire has slightly less resistance ...I could be wrong, but {with non-RF apps} I think it is the other way around. For example,
http://www.mogami.com/e/cad/wire-gauge.html
http://power.tycoelectronics.com/pdf/ks-20747_power_wire.pdf

RC-CAM

[Ron van Sommeren]

For the same gauge, stranded (and the more # of fine strands, the better) wire has slightly less resistance and less associated voltage drop, for some reason....flex not involved........ kwIn fact, specific resistance is higher, because of the insulation. Most people think that the thinner a pipe is, the more you can pack. This is not the case, no matter the thickness/diameter of the pipe/pole, the space between them will always be 9-10%, ad infinitum. The same goes for balls.