New Zealand Gazette – 1935 – No. 65

Page 2529

✨ Electrical Engineering Tables



SEPT. 6.]

THE NEW ZEALAND GAZETTE.

2529

TRIPLE-BRAIDED COPPER—continued.

(F.) 19/·064 in. (19/16 S.W.G.).

Constants.—Area (copper), 0·0611 sq. in.; diameter (covered), 0·598 in.;
loading factor, 2·84; maximum tension in conductor, 1,525 lb.; weight
of covered conductor, 0·3378 lb. per foot.

Span Datum. 0. Degrees Fahrenheit above Datum. 20. Degrees Fahrenheit above Datum. 40. Degrees Fahrenheit above Datum. 60. Degrees Fahrenheit above Datum. 80. Degrees Fahrenheit above Datum. 100.
Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag.
Ft. lb. Ft. in. lb. Ft. in. lb. Ft. in. lb. Ft. in. lb. Ft. in. lb. Ft. in.
180 .. 1259 1 0 1070 1 3 900 1 6 744 1 10 616 2 3 517 2 8
220 .. 1141 1 9 974 2 1 824 2 6 699 2 11 599 3 5 522 3 11
260 .. 1021 2 10 882 3 3 763 3 9 666 4 3 586 4 10 524 5 5
300 .. 919 4 2 806 4 9 713 5 4 637 6 0 576 6 7 526 7 3
340 .. 834 5 10 747 6 6 676 7 3 616 7 11 569 8 7 528 9 3
380 .. 770 7 11 703 8 8 648 9 5 602 10 1 563 10 10 530 11 6

TABLE VI.—V.I.R. (H.D.) COPPER.

Wind, 18 lb. per square foot of diametral plane.

Constants.—Coefficient of thermal expansion = 9·45 x 10⁻⁶ per degree
Fahrenheit; maximum allowable stress = 25,000 lb. per square inch;
modulus of elasticity = 18 x 10⁶ lb. per square inch.

NOTE.—In computing the loading factor for this table the weight and
diameter of the covered wire only has been used.

(A.) 7/·044 in.

Constants.—Area (copper), 0·01064 sq. in.; diameter (covered), 0·287 in.;
loading factor, 6·09; maximum tension in conductor, 266 lb.; weight
of covered conductor, 0·0717 lb. per foot.

Span. Datum. 0. Degrees Fahrenheit above Datum. 20. Degrees Fahrenheit above Datum. 40. Degrees Fahrenheit above Datum. 60. Degrees Fahrenheit above Datum. 80. Degrees Fahrenheit above Datum. 100.
Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag.
Ft. lb. Ft. in. lb. Ft. in. lb. Ft. in. lb. Ft. in. lb. Ft. in. lb. Ft. in.
180 .. 52 5 7 50 5 9 49 5 11 47 6 2 46 6 4 45 6 6
220 .. 49 8 10 48 9 0 47 9 3 46 9 5 45 9 7 44 9 9
260 .. 47 12 10 46 13 0 46 13 2 45 13 4 45 13 6 44 13 8
300 .. 46 17 5 46 17 7 45 17 9 45 17 11 44 18 1 44 18 3
340 .. 46 22 8 45 22 10 45 23 0 44 23 2 44 23 4 44 23 6
380 .. 45 28 6 45 28 8 44 28 11 44 29 1 44 29 3 44 29 5

(B.) 7/·052 in.

Constants.—Area (copper), 0·01483 sq. in.; diameter (covered), 0·317 in.;
loading factor, 5·14; maximum tension in conductor, 371 lb.; weight
of covered conductor, 0·0945 lb. per foot.

Span. Datum. 0. Degrees Fahrenheit above Datum. 20. Degrees Fahrenheit above Datum. 40. Degrees Fahrenheit above Datum. 60. Degrees Fahrenheit above Datum. 80. Degrees Fahrenheit above Datum. 100.
Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag. Ten. Sag.
Ft. lb. Ft. in. lb. Ft. in. lb. Ft. in. lb. Ft. in. lb. Ft. in. lb. Ft. in.
180 .. 97 3 11 92 4 2 86 4 5 83 4 7 78 4 10 75 5 1
220 .. 87 6 7 84 6 10 82 7 0 77 7 3 76 7 6 74 7 9
260 .. 82 9 9 80 10 0 78 10 2 76 10 5 75 10 8 73 10 11
300 .. 79 13 5 78 13 7 76 13 10 75 14 1 74 14 4 73 14 6
340 .. 77 17 7 76 17 9 75 18 0 74 18 3 74 18 6 73 18 8
380 .. 76 22 3 75 22 5 75 22 8 74 22 11 73 23 1 73 23 4

C*



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✨ LLM interpretation of page content

🏗️ Still-Air Sag and Tension Tables for Electrical Conductors (continued from previous page)

🏗️ Infrastructure & Public Works
Electrical Conductors, Sag, Tension, Tables, Engineering

🏗️ V.I.R. (H.D.) Copper Wind Load Tables

🏗️ Infrastructure & Public Works
Electrical Conductors, Wind Load, Sag, Tension, Engineering