New Zealand Gazette – 1927 – No. 48

Page 2387

✨ Electrical Supply Regulations

JULY 12.] THE NEW ZEALAND GAZETTE. 2387

(F.) 19/·064 in. (19/16 S.W.G.).

Constants.—Area (copper), 0·061 sq. in.; diameter (covered), 0·598 in.; loading factor, 2·84; maximum tension in conductor, 1525 lb.; weight of covered conductor, 0·3378 lb. per foot.

Span.	Datum.	Degrees Fahrenheit above Datum.
	0.	20.
	Ten.	Sag.
Ft.	lb.	Ft. in.
180 ..	1259	1 0
220 ..	1141	1 9
260 ..	1021	2 10
300 ..	919	4 2
340 ..	834	5 10
380 ..	770	7 11

TABLE VII.—V.I.R. (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/·036 in. (7/20 S.W.G.).

Constants.—Area (copper), 0·00712 sq. in.; diameter (covered), 0·259 in.; loading factor, 7·33; maximum tension in conductor, 178 lb.; weight of covered conductor, 0·0536 lb. per foot.

Span.	Datum.	Degrees Fahrenheit above Datum.
	0.	20.
	Ten.	Sag.
Ft.	lb.	Ft. in.
180 ..	27	8 1
220 ..	26	12 6
260 ..	25	17 10
300 ..	25	24 0
340 ..	25	31 1
380 ..	25	38 10

(B.) 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.	Degrees Fahrenheit above Datum.
	0.	20.
	Ten.	Sag.
Ft.	lb.	Ft. in.
180 ..	52	5 7
220 ..	49	8 10
260 ..	47	12 10
300 ..	46	17 5
340 ..	46	22 8
380 ..	45	28 6

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VUW Te Waharoa — NZ Gazette 1927, No 48

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🏗️ Electrical Supply Regulations, 1927 (continued) (continued from previous page)

Domain🏗️ Infrastructure & Public Works
KeywordsRegulations, Electrical Supply, Public Works Act, Inspections, Fees, Compliance, Dangerous Lines, Penalties, Tables, Constants, Span, Tension, Sag

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