New Zealand Gazette – 1935 – No. 65

Page 2527

✨ Electrical Conductor Tables



SEPT. 6.] THE NEW ZEALAND GAZETTE. 2527

BARE COPPER—continued.

(H.) 19/·052 in.

Constants.—Area, 0·0403 sq. in.; diameter, 0·260 in.; loading factor, 2·66; maximum tension in conductor, 1,008 lb.; weight, 0·1582 lb. per foot.

Span. Datum. Degrees Fahrenheit above Datum.
0. 20.
Ten. Sag.
Ft. lb. Ft. in.
180 869 0 9
220 807 1 2
260 743 1 10
300 679 2 7
340 622 3 8
380 575 5 0

(I.) 19/·064 in. (19/16 S.W.G.).

Constants.—Area, 0·0611 sq. in.; diameter, 0·320 in.; loading factor, 2·2; maximum tension in conductor, 1,525 lb.; weight, 0·2395 lb. per foot.

Span. Datum. Degrees Fahrenheit above Datum.
0. 20.
Ten. Sag.
Ft. lb. Ft. in.
180 1392 0 8½
220 1333 1 1
260 1266 1 7
300 1192 2 3
340 1130 3 1
380 1067 4 1

TABLE V.—TRIPLE-BRAIDED (H.D.) COPPER.

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

Constants.—Coefficient of thermal expansion = 9·45 × 10⁻⁶ per degree Fahrenheit; maximum allowable stress = 25,000 lb. per square inch; modulus of elasticity = 18 × 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), 0·280 in.; loading factor, 6·2; maximum tension in conductor, 266 lb.; weight of covered conductor, 0·0687 lb. per foot.

Span. Datum. Degrees Fahrenheit above Datum.
0. 20.
Ten. Sag.
Ft. lb. Ft. in.
180 53 5 3
220 49 8 6
260 47 12 4
300 46 16 10
340 45 22 0
380 44 27 9

C



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

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Electrical Conductors, Sag, Tension, Tables, Engineering