2368
THE NEW ZEALAND GAZETTE.
[No. 48

(3) Service-lines shall be so attached to the building that it is impossible to touch them without the use of a ladder or other climbing-appliance.

(4) Where an extension-piece is necessary on a consumer’s building to provide the necessary clearance, it shall be of substantial construction and perfectly rigid, and the leading-in conduit shall be taken up such extension-piece to a point near the attachment of the service-lines.

115. Overhead electric lines at high pressure shall not at any part thereof be erected and maintained along or across any street or footpath at a less height than 20 ft. above ground-level, and such lines erected elsewhere shall not be erected and maintained at a less height above-ground level than 18 ft. if bare or 16 ft. if covered, save that where such last-mentioned lines cross any place used by vehicles having a height (including their loads) greater than 10 ft. the 20 ft. clearance shall be provided.

116. Overhead electric lines at extra-high pressure shall not at any part thereof be erected and maintained at a less height above ground level than—

(a) 20 ft. in the case of such lines operating at a pressure not exceeding 11,000 volts and erected elsewhere than in a street or elsewhere than across a footpath or any place used by vehicles having a height (including their loads) greater than 12 ft.; or

(b) 22 ft. in any other case.

117. (1) Where, in borough, town-district, and township limits, medium, low, and high or extra-high pressure lines (other than electric service-lines) are carried on the same poles, a minimum height above ground-level of 20 ft. shall be maintained at any part thereof in respect of the medium and low pressure lines for the purpose of allowing telegraph wires to cross beneath the lines.

(2) The said height of 20 ft. shall be maintained, in country areas, at the nearest such pole to any building.

(3) In the case of electric service-lines, the said clearance of 20 ft. shall be maintained at telegraph crossings.

(4) Where, in any locality, lines of such pressures as aforesaid are carried on the same poles along tramway routes, the medium or low pressure lines shall be at such a height above ground-level as may be necessary to allow telegraph-wires to cross beneath them and to pass above the trolley-wire of the tramway.

118. Overhead electric lines crossing electric-tramway lines shall have the following minimum clearances above the trolley wire or wires—namely, 4 ft. in the case of lines operating at a pressure not exceeding 11,000 volts; 6 ft. in any other case.

119. No overhead medium or lower pressure electric line shall come within 2 ft. of any other separately owned aerial lines or cables except at a pole, and then only by arrangement between the respective owners of the wires.

120. (1) Overhead lines of high and extra-high pressure shall cross any other separately owned aerial lines or cables only pursuant to an agreement between the respective owners, and in every case shall have the following clearances between lines, measured horizontally or vertically at maximum sag:—

Between.
Minimum Clearance.

(a) Medium or any lower pressure and high pressure—

(i) If all covered (except neutral) .. 2 ft.

(ii) If any bare (except neutral) .. 4 ft.

(b) Medium or any lower pressure and extra-high pressure not over 11,000 volts .. 4 ft.

(c) Medium or any lower pressure and extra-high pressure over 11,000 volts .. 6 ft.

(d) High pressure and extra-high pressure not over 11,000 volts .. 4 ft.

(e) High pressure and extra-high pressure over 11,000 volts .. 6 ft.

(f) Extra-high pressure not over 11,000 volts and extra-high pressure not over 35,000 volts.. 4 ft.

(g) Extra-high pressure and extra-high pressure over 35,000 volts .. 6 ft.

(2) When crossing underneath in a span between the poles supporting the lines above, the lower lines shall have the following horizontal clearances between the nearest line and any pole supporting the lines above:—

Between.
Minimum Clearance.

(a) Pole and medium or any lower pressure—

If covered (except neutral) .. .. 2 ft.

If bare (except neutral) .. .. 4 ft.

(b) Pole and high-pressure—

If covered .. .. .. 4 ft.

If bare .. .. .. 6 ft.

(c) Pole and extra-high pressure .. .. 6 ft.

(3) When crossing underneath at a pole supporting the lines above, all the lower lines shall be attached to insulators fixed on cross-arms fitted to this pole.

(4) Where guard-wires are used they shall, for the purposes of this regulation, be deemed to be medium-pressure electric lines, and the clearances specified in subclause (1) hereof with respect to medium-pressure lines shall be observed.

121. (1) Where medium or any lower pressure and high or extra-high pressure electric lines are carried on the same poles, the lines shall have the following clearances, measured at the pole:—

Between.
Minimum Clearance.

(a) Medium or any lower pressure and high pressure—

(i) If all covered (except neutral)—vertical or horizontal .. .. .. 2 ft.

(ii) If any bare (except neutral)—vertical or horizontal .. .. .. 4 ft.

(b) Medium or any lower pressure and extra-high pressure not over 11,000 volts—Vertical.. 4 ft.

(c) Medium or any lower pressure and extra-high pressure over 11,000 volts—Vertical .. 6 ft.

(d) High pressure and extra-high pressure not over 11,000 volts—

(i) Vertical .. .. .. 4 ft.

(ii) Horizontal .. .. .. 3 ft.

(e) High pressure and extra-high pressure over 11,000 volts—Horizontal or vertical .. 4 ft.

(f) Extra-high pressure and extra-high pressure—

(i) Vertical .. .. .. 4 ft.

(ii) Horizontal .. .. .. 3 ft.

(2) Under any of the conditions of wind-pressure and temperature embodied in the license or these regulations the separation between wires at the centre of the span shall not be less than one-half of the distances specified in the last preceding subclause.

122. (1) Where lines of the same pressure are carried on the same poles the circuits shall have the following clearances, measured horizontally or vertically at the pole:—

Between.
Minimum Clearance.

(a) Medium or any lower pressure .. .. 1 ft.

(b) High pressure .. .. .. 2 ft.

(c) Extra-high pressure not over 11,000 volts—

Vertical .. .. .. .. 2 ft.

Horizontal .. .. .. .. 2½ ft.

(2) For pressures exceeding 11,000 volts the clearances shall be such as are approved by the Chief Electrical Engineer.

(3) Under any of the conditions of wind-pressure and temperature embodied in the license or these regulations the separation between wires at the centre of the span shall not be less than one-half of the distances specified in subclause (1) of this regulation.

123. Where lines of different pressures are taken down poles to transformers or other apparatus, unless the lines are enclosed in pipes, or lead-covered cables are used, they shall be supported vertically by insulators spaced not more than 5 ft. apart, or by strain insulators fitted at top and bottom, and the following clearances between lines of different pressures shall be provided:—

Between.
Minimum Clearance.

(a) Medium or any lower pressure and high pressure .. .. .. .. 1 ft.

(b) Medium or any lower pressure and extra-high pressure not over 11,000 volts .. .. 2 ft.

(c) High pressure and extra-high pressure not over 11,000 volts .. .. .. 2 ft.

124. (1) Where it is possible for any conductor to be alive on any cross-arm below the top circuit or circuits, while any conductors above are dead, either the following climbing-spaces shall be provided at the pole between conductors, or all conductors through which it is necessary to climb shall be made dead before any work is undertaken on the overhead lines, or else the conductors below the top circuit or circuits shall be enclosed in an earthed pipe or pipes:—

Between.
Minimum Clearance.

(a) Medium or any lower pressure, covered* .. 2½ ft.

(b) Medium or any lower pressure, bare .. 3 ft.

(c) High pressure, covered .. .. 3 ft.

(d) High pressure, bare .. .. 4 ft.

(e) Extra-high pressure not over 11,000 volts .. 5 ft.

• Medium or any lower pressure, covered, includes bare earthed neutral where used.

Provided that where vertical-rack construction is used for medium or any lower pressure electric lines the above clearances need not be provided; but, if not so provided, pole steps shall not be used,