[TowerTalk] Rotor Control Cable

[KD0RII]

As you can see from the area of the conductor from the chart below, your 
examples are actually understated, and your conclusion is faulty.

Two #18 will give you almost a #12 capacity, rather than #15 and

Two #15 will give you almost a #9 capacity, rather than #12

Each paring does not reduce the "gage" by 3.

AWG    Di. in.    Di. mm    ohms/1kFt.    ohms/km    (1)    (2) (3)    
     (4)

8     0.1285     3.2639     0.6282     2.060496     73     24 1650 Hz 
     480 lbs
9     0.1144     2.90576     0.7921     2.598088     64     19 2050 Hz 
     380 lbs
10     0.1019     2.58826     0.9989     3.276392     55     15 2600 Hz 
     314 lbs
11     0.0907     2.30378     1.26      4.1328     47     12 3200 Hz     
249 lbs
12     0.0808     2.05232     1.588     5.20864     41     9.3 4150 Hz 
     197 lbs
13     0.072     1.8288     2.003     6.56984     35     7.4 5300 Hz     
150 lbs
14     0.0641     1.62814     2.525     8.282     32     5.9 6700 Hz     
119 lbs
15     0.0571     1.45034     3.184     10.44352     28     4.7 8250 Hz 
     94 lbs
16     0.0508     1.29032     4.016     13.17248     22     3.7 11 kHz 
     75 lbs
17     0.0453     1.15062     5.064     16.60992     19     2.9 13 kHz 
     59 lbs
18     0.0403     1.02362     6.385     20.9428     16     2.3 17 kHz 
     47 lbs
19     0.0359     0.91186     8.051     26.40728     14     1.8 21 kHz 
     37 lbs
20     0.032     0.8128     10.15     33.292     11     1.5     27 kHz 
     29 lbs

(1) Maximum amps for chassis wiring
(2) Maximum amps for power transmission
(3) Maximum frequency for 100% skin depth for solid conductor copper
(4) Breaking force Soft Annealed Cu 37000 PSI

AWG    Di. mm    Area    sq.mm.
8    3.2639    10.2538
9    2.90576    9.12871    *2=    18.25743
10    2.58826    8.13126    *2=    16.26252
11    2.30378    7.23754    *2=    14.47508
12    2.05232    6.44755    *2=    12.89511
15    1.45034    4.55638    *2=    9.112755
18    1.02362    3.21580    *2=    6.431594

----------
73 de George, KD0RII

On 5/10/2016 11:49, W5GN wrote:
> FWIW, it's certainly new, but I just read that if you
> pair two #18 gage wires,
> you have #15 gage capacity, and if then pair the two #15's,
> you have #12 gage capacity.
> Each paring reduces the gage by 3.
>
> Barry, W5GN
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Wilson
> Sent: Tuesday, May 10, 2016 11:24 AM
> To: towertalk <towertalk at contesting.com>
> Subject: [TowerTalk] Rotor Control Cable
>
> Did u check the wire gauges?
> If your run is “long”, you need two motor power wires of larger gauge.
> I don’t know what “long” is.
> WL
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk