EE21: GALVANIZED IRON (GI) EARTH STRIP SIZE FOR VARIOUS APPLICATIONS

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According to NEC minimum 2,5m electrode must be in contact with ground.

NoEquipmentsEarth Strip Size
1HT switchgear, structures, cable trays & fence, rails, gate and steel column55 X 6 mm (GI)
2Lighting Arrestor25 X 3 mm (Copper)
3PLC Panel25 X 3 mm (Copper)
4DG & Transformer Neutral50X6 mm (Copper)
5Transformer Body50X6 mm (GI)
6Control & Relay Panel25 X 6 mm (GI)
7Lighting Panel & Local Panel25 X 6 mm (GI)
8Distribution Board25 X 6 mm (GI)
9Motor up to 5.5 kw4 mm2 (GI)
10Motor 5.5 kw to 55 kw25 X 6 mm (GI)
11Motor 22 kw to 55 kw40 X 6 mm (GI)
12Motor Above 55 kw55 X 6 mm (GI)
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