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Minimum Size of Earthing Conductors

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Minimum Size of Earthing Conductors

Nominal area active
conductors mm2
For copper active
conductors mm2
For aluminium active
conductors mm2
1
1*
 
1.5
1.5*
 
2.5
2.5
 
4
2.5
 
6
2.5
2.5
10
4
2.5
16
6
4
25
6
6
35
10
6
50
16
10
70
25
10
95
25
16
120
35
25
150
50
25
185
70
35
240
95
50
300
120
70
400
120
95
500
120
95
630
120
120
*Refer Wiring Rules, AS/NZS 3000 regarding 1.5 earthing conductors

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