New Zealand Gazette – 1935 – No. 65

Page 2523

✨ Electrical Conductor Tables

SEPT. 6.] THE NEW ZEALAND GAZETTE. 2523

TRIPLE-BRAIDED COPPER—continued.

(G.) 19/·072 in. (19/15 S.W.G.).

Constants.—Area (copper), 0·0774 sq. in.; diameter (covered), 0·642 in.; loading factor, 1·85; maximum tension in conductor, 1,935 lb.; weight of covered conductor, 0·4131 lb. per foot.

Span.	Datum.	Degrees Fahrenheit above Datum.
	0.	20.
	Ten.	Sag.
Ft.	lb.	Ft. in.
120 ..	1894	0 4½
140 ..	1816	0 6½
160 ..	1783	0 9
180 ..	1747	0 11

(H.) 19/·083 in.

Constants.—Area (copper), 0·1028 sq. in.; diameter (covered), 0·698 in.; loading factor, 1·65; maximum tension in conductor, 2,570 lb.; weight of covered conductor, 0·5276 lb. per foot.

Span.	Datum.	Degrees Fahrenheit above Datum.
	0.	20.
	Ten.	Sag.
Ft.	lb.	Ft. in.
120 ..	2493	0 4½
140 ..	2466	0 6½
160 ..	2436	0 8½
180 ..	2403	0 11

TABLE III.—V.I.R. (H.D.) COPPER.

Wind, 12 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), 0·287 in.; loading factor, 4·13; maximum tension in conductor, 266 lb.; weight of covered conductor, 0·0717 lb. per foot.

Span.	Datum.	Degrees Fahrenheit above Datum.
	0.	20.
	Ten.	Sag.
Ft.	lb.	Ft. in.
120 ..	150	0 10
140 ..	125	1 5
160 ..	106	2 2
180 ..	95	3 1

(B.) 7/·052 in.

Constants.—Area (copper), 0·01483 sq. in.; diameter (covered), 0·317 in.; loading factor, 3·51; maximum tension in conductor, 371 lb.; weight of covered conductor, 0·0945 lb. per foot.

Span.	Datum.	Degrees Fahrenheit above Datum.
	0.	20.
	Ten.	Sag.
Ft.	lb.	Ft. in.
120 ..	264	0 7½
140 ..	233	0 11
160 ..	204	1 6
180 ..	181	2 1

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VUW Te Waharoa — NZ Gazette 1935, No 65

NZLII — NZ Gazette 1935, No 65

Parliament House (depicted) was completed in 1918 and remains the primary seat of Parliament.

✨ LLM interpretation of page content

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

Domain🏗️ Infrastructure & Public Works
KeywordsElectrical Conductors, Sag, Tension, Tables, Engineering

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