Page 544 - IS-Rayfast Catalogue - Issue 9, 2017

Appendix
Formulas and Constants

Wire Bundle Multiplication Factors

Wire Bundle Multiplication Factors Number of Wires Multiplication Factor
Equal Size Wires
The table right provides multiplication factors 1 1.00
for wire bundles of 1 to 61. To determine the 2 2.00
approximate diameter of a wire bundle when
3 2.16
the wires are all the same size, find the factor
for the number of wires in the bundle and 4 2.41
multiply the wire diameter by that factor. 5 2.70
6, 7 3.00
8 3.60
Calculation of Wire Bundle
Different Size Wires 9, 10, 11, 12 4.00
To determine the wire bundle diameter when 13, 14 4.41
using wires of different sizes, follow steps:
15, 16 4.70
1. Determine the number of wires in the wire
17, 18, 19 5.00
bundle.
2. Find the diameter of the wires in the Wire 20, 21 5.31
& Cable section of this catalogue. 22, 23, 24 5.61
3. Calculate the cable bundle outside 25, 26, 27 6.00
diameter by using the example below.
28, 29, 30 6.41
Example: A bundle of wires containing: 31, 32, 33 6.70
• 3 wires of 44A0111-22 (@ 1.19mm dia.) 34, 35, 36, 37 7.00
• 5 wires of 44A0111-20 (@ 1.40mm dia.) 38, 39 40 7.31
• 1 wire of 44A0111-18 (@ 1.65mm dia.) 41, 42, 43, 44 7.61
45, 46, 47, 48 8.00
2
2
2
D = 1.2 √ (3 x 1.19 + 5 x 1.40 + 1 x 1.65 ) 49, 50, 51, 52 8.41
D = 1.2 √ (3 x 1.42 + 5 x 1.96 + 1 x 2.72) 53, 54, 55, 56 8.70
D = 1.2 √ (4.26 + 9.80 + 2.72) 57, 58, 59, 60, 61 9.00
D = 1.2 √ (16.78)
D = 1.2 x 4.10
D = 4.92mm

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