Electrical Supply Regulations Tables




JULY 12.] THE NEW ZEALAND GAZETTE. 2385

(F.) 7/·064 in. (7/16 S.W.G.).

Constants.—Area, 0·0225 sq. in.; diameter, 0·192 in.; loading factor, 3·42; maximum tension in conductor, 562 lb.; weight, 0·0885 lb. per foot.

Span. Datum. Degrees Fahrenheit above Datum.
0. 20.
Ten. Sag.
Ft. lb. Ft.in.
180 .. 425 0 10
220 .. 371 1 5
260 .. 319 2 4
300 .. 276 3 7
340 .. 248 5 2
380 .. 228 7 0

(G.) 19/·052 in.

Constants.—Area, 0·0403 sq. in.; diameter, 0·260 in.; loading factor, 2·66; maximum tension in conductor, 1008 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

(H.) 19/·064 in. (19/16 S.W.G.).

Constants.—Area, 0·061 sq. in.; diameter, 0·320 in.; loading factor, 2·2; maximum tension in conductor, 1525 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 VI.—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 = 8 × 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, 7·64; maximum tension in conductor, 178 lb.; weight of covered conductor, 0·0513 lb. per foot.

Span. Datum. Degrees Fahrenheit above Datum.
0. 20.
Ten. Sag.
Ft. lb. Ft.in.
180 .. 26 8 1
220 .. 25 12 6
260 .. 24 17 9
300 .. 24 24 0
340 .. 24 31 0
380 .. 24 38 10


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