Series 72 Guardian Introduction to Conduit Interconnect Technologies and Packaging Determining Tubing Size How to use the tables on this page: It is possible for a wire bundle to contain wires of all the same size diameter, or a variety of mixed diameters. The gauge provides only the diameter of the conductor, and this information alone is not sufficient to determine required tubing size. Referring to the appropriate wire specification is necessary to establish the overall diameter over the insulation and/or braids. Step All Wires Same Diameter Two Different Wire Diameters 1. A bundle containing 30 wires 30 wires @ .045 dia 2. Determine average wire diameter 30 × .045 = 1.35 1.35 ÷ 30 = .045 average wire diameter 15 wires @ .045 dia 15 wires @ .135 dia 15 × .045 = .68 15 × .135 = 2.03 2.71 2.71 ÷ 30 = .090 average wire diameter 3. Using Table I, find factor for 30 wires (6.7) .045 × 6.7 = .3015 wire bundle diameter and multiply by average wire diameter 4. Tubing size is determined on Table II. Size 12 (.305 dia = 70% fill) 70% fill is recommended .090 × 6.7 = .603 wire bundle diameter Size 24 (.607 dia = 70% fill) Table I Number of Wires Factor 1 1.0 2 2.0 3 2.2 4 2.4 5 2.7 6 2.9 7 3.0 8 3.3 9 3.8 10 4.0 12 4.3 14 4.6 16 5.0 18 5.3 20 5.6 24 6.0 28 6.5 32 6.9 Number of Wires Factor 36 7.4 40 7.7 45 8.1 50 8.5 55 8.9 60 9.3 65 9.7 70 10.1 75 10.5 80 10.9 90 11.6 100 12.2 125 13.7 150 15.0 175 16.1 200 17.2 250 19.3 300 21.0 Table II Bulk Conduit Length Tolerances Tubing Size Tubing I.D. 50% Fill 60% Fill 70% Fill 80% Fill 06 09 10 12 14 16 20 24 28 32 40 .187 (4.7) .281 (7.1) .312 (7.9) .375 (9.5) .437 (11.1) .500 (12.7) .625 (15.9) .750 (19.1) .875 (22.2) 1.000 (25.4) 1.250 (31.8) .128 (3.3) .193 (4.9) .217 (5.5) .257 (6.5) .302 (7.7) .343 (8.7) .426 (10.8) .513 (13.0) .608 (15.4) .686 (17.4) .852 (21.6) .140 (3.6) .211 (5.4) .237 (6.0) .282 (7.2) .331 (8.4) .376 (9.6) .467 (11.9) .562 (14.3) .666 (16.9) .751 (19.1) .933 (23.7) .151 (3.8) .229 (5.8) .256 (6.5) .305 (7.7) .357 (9.1) .406 (10.3) .505 (12.8) .607 (15.4) .720 (18.3) .812 (20.6) 1.008 (25.6) .162 (4.1) .244 (6.2) .274 (7.0) .326 (8.3) .382 (9.7) .434 (11.0) .539 (13.7) .649 (16.5) .769 (19.5) .868 (22.0) 1.078 (27.4) The following tolerances apply to the lengths of bulk conduit Inches Length Tolerance 12 - 144 145 - 600 601 - up + 2.0 +4.0 + 6.0 Lenth 31 - 366 367 - 1524 1525 - up Centimeters Tolerance +5.0 +10.2 +15.2 Catalog Notes For all parts in this catalog: All parts will be identified with manufacturer’s name and part number, space permitting. Metric dimensions appear in parentheses in diagrams and tables, based on 1 inch = 25.4 mm, for reference only. ©2011 Glenair, Inc. CAGE Code 06324 Printed in U.S.A. GLENAIR, INC. • 1211 AIR WAY • GLENDALE, CA 91201-2497 • 818-247-6000 • FAX 818-500-9912 8