Victorian Numbered Regulations Victorian Numbered RegulationsSchedule 2—Applicable distance for middle two thirds of a span of an electric line
GRAPH 1—INSULATED ELECTRIC LINES IN ALL AREAS
Clauses 3 and 24
Graph 1 Formula
The formula by which the applicable distance for the middle two thirds of a span of an electric line to which clause 24 applies is calculated is as follows:
For 0 < SD ≤ 40, AD = 300 mm
For 40 < SD ≤ 100, AD = 300 + ((SD - 40) × 10)
For 100 < SD, AD = 900 mm
Where:
SD = Span Distance
AD = Applicable Distance
Notes to Graph 1
(1) The applicable distance includes allowances for sag and sway of the cable.
(2) The minimum clearance space for a span of an electric line to which this Graph and clause 24 apply is partially illustrated in Figures 1, 2 and 3.
(3) The applicable distance for the first and last sixths of a span of an electric line to which clause 24 applies is 300 millimetres.
GRAPH 2—UNINSULATED LOW VOLTAGE ELECTRIC LINE IN LOW BUSHFIRE RISK AREA
Clauses 3 and 25
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Graph 2 Formula
The formula by which the applicable distance for the middle two thirds of a span of an electric line to which clause 25 applies is calculated is as follows:
For 0 < SD ≤ 45, AD = 1000 mm
For 45 < SD ≤ 100, AD = 1000 + ((SD - 45) × (1500 ÷ 55))
For 100 < SD, AD = 2500 mm
Where:
SD = Span Distance
AD = Applicable Distance
Notes to Graph 2
(1) The applicable distance includes allowances for sag and sway of the cable for a span up to and including 100 metres in length.
(2) For a span longer than 100 metres, the applicable distance must be extended by an additional distance to allow for sag and sway of the cable. This is done by adding that distance to the applicable distance (see clause 25(2)(b)).
(3) A distribution company, or an owner or operator of a railway supply network or a tramway supply network, must assist a Council, if requested, by determining the additional distance that allows for sag and sway of the cable (see clause 21(2)).
(4) The minimum clearance space for a span of an electric line to which this Graph and clause 25 apply is partially illustrated in Figures 1 and 4.
(5) The applicable distance for the first and last sixths of a span of an electric line to which clause 25 applies is 1000 millimetres.
GRAPH 3—UNINSULATED HIGH VOLTAGE ELECTRIC LINE (OTHER THAN A 66 000 VOLT ELECTRIC LINE) IN LOW BUSHFIRE RISK AREA
Clauses 3 and 26
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Graph 3 Formula
The formula by which the applicable distance for the middle two thirds of a span of an electric line to which clause 26 applies is calculated is as follows:
For 0 < SD ≤ 45, AD = 1500 mm
For 45 < SD ≤ 100, AD = 1500 + ((SD - 45) × (1000 ÷ 55))
For 100 < SD, AD = 2500 mm
Where:
SD = Span Distance
AD = Applicable Distance
Notes to Graph 3
(1) The applicable distance includes allowances for sag and sway of the cable for a span up to and including 100 metres in length.
(2) For a span longer than 100 metres, the applicable distance must be extended by an additional distance to allow for sag and sway of the cable. This is done by adding that distance to the applicable distance (see clause 26(2)(b)).
(3) A distribution company, or an owner or operator of a railway supply network or a tramway supply network, must assist a Council, if requested, by determining the additional distance (see clause 21(2)).
(4) The minimum clearance space for a span of an electric line to which this Graph and clause 26 apply is partially illustrated in Figures 1 and 3.
(5) The applicable distance for the first and last sixths of a span of an electric line to which clause 26 applies is 1500 millimetres.
GRAPH 4—UNINSULATED 66 000 VOLT ELECTRIC LINE IN LOW BUSHFIRE RISK AREA
Clauses 3 and 27
Graph 4 Formula
The formula by which the applicable distance for the middle two thirds of a span of an electric line to which clause 27 applies is calculated is as follows:
For 0 < SD ≤ 45, AD = 2250 mm
For 45 < SD ≤ 100, AD = 2250 + ((SD - 45) × (1250 ÷ 55))
For 100 < SD, AD = 3500 mm
Where:
SD = Span Distance
AD = Applicable Distance
Notes to Graph 4
(1) The applicable distance includes allowances for sag and sway of the cable for a span up to and including 100 metres in length.
(2) For a span longer than 100 metres, the applicable distance must be extended by an additional distance to allow for sag and sway of the cable. This is done by adding that distance to the applicable distance (see clause 27(2)(a)(ii)).
(3) A distribution company, or an owner or operator of a railway supply network or a tramway supply network, must assist a Council, if requested, by determining the additional distance (see clause 21(2)).
(4) The minimum clearance space for a span of an electric line to which this Graph and clause 27 apply is partially illustrated in Figures 1 and 5.
(5) The applicable distance for the first and last sixths of a span of an electric line to which clause 27 applies is 2250 millimetres.
GRAPH 5—UNINSULATED LOW VOLTAGE AND HIGH VOLTAGE ELECTRIC LINE (OTHER THAN A 66 000 VOLT ELECTRIC LINE) IN HAZARDOUS BUSHFIRE RISK AREA
Clauses 3 and 28
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Graph 5 Formula
The formula by which the applicable distance for the middle two thirds of a span of an electric line to which clause 28 applies is calculated is as follows:
For 0 < SD ≤ 45, AD = 1500 mm
For 45 < SD ≤ 500, AD = 1500 +((SD - 45) × (500 ÷ 303))
For 500 < SD, AD = 2250 mm
Where:
SD = Span Distance
AD = Applicable Distance
Notes to Graph 5
(1) The applicable distance must be extended by an additional distance to allow for sag and sway of the cable. This is done by adding that distance to the applicable distance (see clause 28(2)(a)).
(2) A distribution company, or an owner or operator of a railway supply network or a tramway supply network, must assist a Council, if requested, by determining the additional distance (see clause 21(2)).
(3) The minimum clearance space for a span of an electric line to which this Graph and clause 28 apply is partially illustrated in Figures 1 and 5.
(4) The applicable distance for the first and last sixths of a span of an electric line to which clause 28 applies is 1500 millimetres.
GRAPH 6—UNINSULATED 66 000 VOLT ELECTRIC LINE IN HAZARDOUS BUSHFIRE RISK AREA
Clauses 3 and 29
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Graph 6 Formula
The formula by which the applicable distance for the middle two thirds of a span of an electric line to which clause 29 applies is calculated is as follows:
For 0 < SD ≤ 45, AD = 2250 mm
For 45 < SD ≤ 350, AD = 2250 + ((SD - 45) × (750 ÷ 305))
For 350 < SD, AD = 3000 mm
Where:
SD = Span Distance
AD = Applicable Distance
Notes to Graph 6
(1) The applicable distance must be extended by an additional distance to allow for sag and sway of the cable. This is done by adding that distance to the applicable distance (see clause 29(2)(a)).
(2) A distribution company, or an owner or operator of a railway supply network or a tramway supply network, must assist a Council, if requested, by determining the additional distance (see clause 21(2)).
(3) The minimum clearance space for a span of an electric line to which this Graph and clause 29 apply is partially illustrated in Figures 1 and 5.
(4) The applicable distance for the first and last sixths of a span of an electric line to which clause 29 applies is 2250 millimetres.
FIGURE 1—PLAN VIEW OF ELECTRIC LINES IN ALL AREAS
Clauses 24, 25, 26, 27, 28 and 29,
Graphs 1, 2, 3, 4, 5 and 6
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FIGURE 2—INSULATED ELECTRIC LINES IN ALL AREAS
Clause 24, Graph 1
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FIGURE 3—INSULATED ELECTRIC LINES IN ALL AREAS AND UNINSULATED HIGH VOLTAGE ELECTRIC LINES (OTHER THAN 66 000 VOLT ELECTRIC LINES) IN LOW BUSHFIRE RISK AREAS
Clauses 24 and 26, Graphs 1 and 3
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FIGURE 4—UNINSULATED LOW VOLTAGE ELECTRIC LINE IN A LOW BUSHFIRE RISK AREA
Clause 25, Graph 2
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FIGURE 5—UNINSULATED 66 000 VOLT ELECTRIC LINE IN A LOW BUSHFIRE RISK AREA AND UNINSULATED ELECTRIC LINE IN A HAZARDOUS BUSHFIRE RISK AREA
Clauses 27, 28 and 29, Graphs 4, 5 and 6
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FIGURE 6—END VIEW OF THE TRANSMISSION LINE
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FIGURE 7—TREES ADJACENT TO THE TRANSMISSION LINE
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