Agarwal Enterprises

GI (galvanized iron) earthing strips are typically 25x3mm, 25x6mm, 32x6mm, or 50x6mm in dimension. They are commonly available in lengths ranging from 5.5m to 10.0m. The zinc coating, achieved through hot dip galvanization, is usually around 80 microns thick. Here's a more detailed look at the specifications:Dimensions:

• Width: 25mm, 32mm, or 50mm.
• Thickness: 3mm or 6mm.
• Length: 5.5m to 10.0m. 

Galvanization:

• Method: Hot dip galvanization. 
• Coating: Typically 70 to 80 microns (average). 
• Finish: The coating should be uniform, clean, smooth, and continuous, free from defects like pitting, laminations, rust, or scale. 

Other Specifications:

• Material: GI steel, conforming to relevant Indian Standards like IS:2629, IS:2633, IS:4759, and IS:6159. 
• Defects: The strips should be free from any electrical or mechanical defects. 
• Quality: Should be free from transit damage and come with a material test certificate from a Government-approved lab. 
• Coefficient of Linear Expansion: Around 11.5 x 10^-6/°C. 

Standards:

• IS:1852, IS:2062, IS:2633, IS:4759:These Indian Standards are often referenced for the material composition and galvanizing process of GI earthing strips. 
• IS:12776 (2002):This standard specifies the requirements for galvanized strand for earthing.