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K Factor Chart
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Cable Diameter Factors (K) for Multi-Conductor Cables
The overall diameter (before tape or drains) of the cable may be estimated by multiplying the diameter of one of the identical components by the K factor shown below. Accurate only with lay-ups indicated. |
1 thru 16 Pairs or Conductors
|
# of Pairs or
Conductors |
Lay-up |
Multipliers |
|
Conductors |
Pairs |
|
Unilay |
Concentric |
| 1 |
1 |
1.000 |
1.000 |
2.00 |
| 2 |
2 |
2.000 |
2.000 |
3.20 |
| 3 |
3 |
2.155 |
2.155 |
3.48 |
| 4 |
4 |
2.414 |
2.414 |
3.91 |
| 5 |
f+5 |
2.701 |
2.701 |
4.43 |
| 6 |
f+6 |
3.000 |
3.000 |
4.91 |
| 7 |
1+6 |
3.000 |
3.000 |
5.26 |
| 8 |
(1+f)+7 |
3.305 |
3.305 |
5.49 |
| 9 |
(1+f)+8 |
3.613 |
3.613 |
6.00 |
| 10 |
(2+2f)+7 |
3.828 |
4.000 |
6.35 |
| 11 |
(2+2f)+9 |
3.924 |
4.000 |
6.51 |
| 12 |
3+9 |
4.030 |
4.155 |
6.51 |
| 13 |
4+(9+f) |
4.195 |
4.414 |
6.96 |
| 14 |
4+10 |
4.236 |
4.414 |
7.03 |
| 15 |
f+5+(10+f) |
4.521 |
4.701 |
7.50 |
| 16 |
f+5+11 |
4.553 |
4.701 |
7.56 |
17 thru 33 Pairs or Conductors
|
# of Pairs or
Conductors |
Lay-up |
Multipliers |
|
Conductors |
Pairs |
|
Unilay |
Concentric |
| 17 |
1+6+(10+2f) |
4.842 |
5.000 |
8.00 |
| 18 |
1+6+(11+f) |
4.820 |
5.000 |
8.04 |
| 19 |
1+6+12 |
4.864 |
5.000 |
8.07 |
| 20 |
f+7+13 |
5.458 |
5.305 |
8.60 |
| 21 |
(1+f)+7+13 |
5.179 |
5.305 |
8.60 |
| 22 |
(1+f)+8+13 |
5.179 |
5.613 |
9.06 |
| 23 |
(1+f)+8+14 |
5.458 |
5.613 |
9.12 |
| 24 |
(2+2f)+8+14 |
5.494 |
6.000 |
9.41 |
| 25 |
3+9+(13+2f) |
5.666 |
6.155 |
9.41 |
| 26 |
3+9+(14+f) |
5.856 |
6.155 |
9.72 |
| 27 |
3+9+15 |
5.879 |
6.155 |
9.76 |
| 28 |
4+10+(14+2f) |
6.044 |
6.414 |
10.03 |
| 29 |
4+10+(15+f) |
6.065 |
6.414 |
10.07 |
| 30 |
4+10+6 |
6.126 |
6.414 |
10.17 |
| 31 |
f+5+11+(15+2f) |
6.363 |
6.701 |
10.56 |
| 32 |
f+5+11+(16+f) |
6.383 |
6.701 |
10.60 |
| 33 |
f+5+11+17 |
6.442 |
6.701 |
10.69 |
34 thru 50 Pairs or Conductors
|
# of Pairs or
Conductors |
Lay-up |
Multipliers |
|
Conductors |
Pairs |
|
Unilay |
Concentric |
| 34 |
1+6+12+(15+3f) |
6.652 |
7.000 |
11.04 |
| 35 |
1+6+12+(16+2f) |
6.670 |
7.000 |
11.07 |
| 36 |
1+6+12+(17+f) |
6.689 |
7.000 |
11.10 |
| 37 |
1+6+12+18 |
6.759 |
7.000 |
11.22 |
| 38 |
(1+f)+7+13+(17+2f) |
6.981 |
7.305 |
11.59 |
| 39 |
(1+f)+7+13+(18+f) |
6.999 |
7.305 |
11.62 |
| 40 |
(1+f)+7+13+19 |
7.076 |
7.305 |
11.75 |
| 41 |
(2+2f)+8+14+(17+3f) |
7.429 |
8.000 |
12.33 |
| 42 |
(2+2f)+8+14+(18+2f) |
7.447 |
8.000 |
12.36 |
| 43 |
(2+2f)+8+14+(19+1) |
7.464 |
8.000 |
12.39 |
| 44 |
(2+2f)+8+14+20 |
7.482 |
8.000 |
12.42 |
| 45 |
3+19+15+(18+3f) |
7.651 |
8.155 |
12.70 |
| 46 |
3+9+15+(19+2f) |
7.667 |
8.155 |
12.73 |
| 47 |
3+9+15+(20+f) |
7.684 |
8.155 |
12.76 |
| 48 |
3+9+15+21 |
7.710 |
8.155 |
12.80 |
| 49 |
4+10+16+(19+3f) |
7.903 |
8.414 |
13.12 |
| 50 |
4+10+16+(20+2f) |
7.918 |
8.414 |
13.14 |
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