Table 1 and Table 2 are based on standard IEC 62305-3 Ed 2. The tables list minimum dimensions for the lightning protection system equipment.
The following table lists the different materials and shapes that are used in air terminals, down conductors, and ground electrodes, including the cross-sectional area.
Material | Configuration | Cross-sectional Area | |
---|---|---|---|
Copper, tin-plated copper | Solid tape |
50 mm2 (AWG 0) |
|
Solid round1 |
50 mm2 (AWG 0) |
||
Stranded 1 |
50 mm2 (AWG 0) |
||
Solid round 2 |
176 mm2 (AWG 350) |
||
Aluminum | Solid tape |
70 mm2 (AWG 00) |
|
Solid round |
50 mm2 (AWG 0) |
||
Stranded |
50 mm2 (AWG 0) |
||
Aluminum alloy | Solid tape |
50 mm2 (AWG 0) |
|
Solid round |
50 mm2 (AWG 0) |
||
Stranded |
50 mm2 (AWG 0) |
||
Solid round 2 |
176 mm2 (AWG 350) |
||
Copper-coated aluminum alloy | Solid round |
50 mm2 (AWG 0) |
|
Hot-dipped galvanized steel | Solid tape |
50 mm2 (AWG 0) |
|
Solid round |
50 mm2 (AWG 0) |
||
Stranded |
50 mm2 (AWG 0) |
||
Solid round 2 |
176 mm2 (AWG 350) |
||
Copper-coated steel | Solid round |
50 mm2 (AWG 0) |
|
Solid tape |
50 mm2 (AWG 0) |
||
Stainless steel | Solid tape 3 |
50 mm2 (AWG 0) |
|
Solid round 3 |
50 mm2 (AWG 0) |
||
Stranded |
70 mm2 (AWG 00) |
||
Solid round 2 |
176 mm2 (AWG 350) |
The following table lists the different materials, shapes, and sizes that are used in ground electrodes.
Material | Configuration | Dimensions | |||
---|---|---|---|---|---|
Earth Rod Diameter | Earth Conductor | Earth Plate | |||
Copper, Tin-plated copper | Stranded | – |
50 mm2 (AWG 0) |
– | |
Solid round |
15 mm (0.59 in) |
50 mm2 (AWG 0) |
– | ||
Solid tape | – |
50 mm2 (AWG 0) |
– | ||
Pipe |
20 mm (0.79 in) |
– | – | ||
Solid plate | – | – |
500 × 500 mm (19.69 × 19.69 in) |
||
Lattice plate 5 | – | – |
600 × 600 mm (23.62 × 23.62 in) |
||
Hot-dipped galvanized steel | Solid round |
14 mm (0.55 in) |
78 mm2 (AWG 000) |
– | |
Pipe |
25 mm (0.98 in) |
– | – | ||
Solid tape | – |
90 mm2 (AWG 000) |
– | ||
Solid plate | – | – |
500 × 500 mm (19.69 × 19.69 in) |
||
Lattice plate 5 | – | – |
600 × 600 mm (23.62 × 23.62 in) |
||
Profile | 6 | – | – | ||
Bare steel7 | Stranded | – |
70 mm2 (AWG 00) |
– | |
Solid round | – |
78 mm2 (AWG 000) |
– | ||
Solid tape | – |
75 mm2 (AWG 000) |
– | ||
Copper-coated steel | Solid round | 14 mm (0.55 in) 8 |
50 mm2 (AWG 0) |
– | |
Solid tape | – |
90 mm2 (AWG 000) |
– | ||
Stainless steel | Solid round | 15 mm (0.59 in) 8 |
78 mm2 (AWG 000) |
– | |
Solid tape | – |
100 mm2 (AWG 0000) |
– |