GI Strip
IS 2062 vs IS 2633 for GI Earthing Strip
IS 2062 and IS 2633 often appear together in conversations about GI earthing strip. They are sometimes used as if they describe the same thing. They do not.
The distinction becomes easier when the product is viewed as two layers: a mild-steel strip forms the base material, and a zinc coating provides the galvanised surface. IS 2062 relates to the base steel. IS 2633 relates to testing the uniformity of the zinc coating on galvanised articles. A clear specification can address both without turning either standard into a blanket statement about the complete earthing system.
Base Steel
What IS 2062 tells the buyer
For GI earthing strip, IS 2062 is the material reference for the hot-rolled structural-steel base. It answers a question about the steel beneath the galvanised coating.
That is different from the dimensional requirement on the purchase order. A BOQ may call for 25×6 mm, 40×6 mm or another approved size. The dimensions identify the section being purchased; the IS 2062 reference identifies the base-steel specification. The GI strip sizing guide covers the size chart itself.
It is also different from IS 3043. IS 3043 is the Code of Practice for Earthing and guides the overall system design and conductor sizing. Describing a strip by the system code alone leaves the actual material standard unclear. A better description identifies the product as GI earthing strip, states the required dimensions and records IS 2062 for the base steel where the consultant’s schedule requires it.
Coating Test
What IS 2633 tells the buyer
Galvanising is not the same subject as the base steel. IS 2633 is used for testing the uniformity of the zinc coating on galvanised articles.
This means an IS 2633 reference should not be presented as proof of the steel grade, strip size or electrical-system design. It concerns the zinc coating’s uniformity test. Likewise, a coating-uniformity test should not be described as a coating-thickness reading. The two observations answer different questions and should remain separate in inspection records.
The practical lesson is simple: a single “IS compliant” label hides important detail. Procurement and quality teams should ask which part of the product the cited standard addresses and what evidence is actually available for that supply.
Thickness
Where coating thickness fits
Coating thickness and coating uniformity are two different observations of the galvanised surface, and neither is the same question as the grade of the base steel. A thickness reading is a measurement in microns; a uniformity test asks whether the deposit is continuous. Keeping them apart in an inspection record avoids a common misreading.
Global Electric Company makes no public claim that a Material Test Certificate verifies zinc coating, and publishes no coating figure. If coating evidence is needed for a particular lot, ask at enquiry stage; it has to stand on its own record, naming the lot, the samples, who measured them, with what instrument and when.
For a project handover, the most useful document is not the one with the most standards printed on it. It is the one that clearly identifies the supplied product and reports only evidence that can be traced to that material or lot. Reading a material test certificate goes through this block by block.
The Enquiry
How to write a clearer GI strip enquiry
A strong enquiry gives the supplier enough information to identify the trade line without guessing. Include:
- Product — GI earthing flat strip
- Approved size — width × thickness
- Quantity — kilograms or metres
- Base material requirement — IS 2062 where specified
- Galvanising or coating requirements — exactly as stated in the consultant’s documents
- Delivery location
- Any document requirement, stated by product
Avoid copying a collection of standard numbers from an old BOQ unless the current consultant has approved them. Each reference should have a defined purpose.
If the project requires a specific test method or acceptance criterion, reproduce that wording exactly in the enquiry. Do not ask the supplier to infer it from a generic phrase such as “all relevant standards.” The consultant or quality plan must define what is required.
Handover
How the standards appear at handover
At handover, the GI strip line should remain traceable from the BOQ to the purchase order, invoice and applicable certificate. The product description and dimensions should be consistent across those records.
A Material Test Certificate ships with every order and identifies the supplied consignment; it is not presented as independent verification of grade or zinc coating. Other earth-pit products follow different certificate rules. GI pipe and wire use the supplier’s certificate passed on as received. GI and copper plates do not have a test certificate. Combining every product under one generic MTC promise would weaken, not improve, the handover record.
In Short
The short version
IS 2062 and IS 2633 are complementary references, not substitutes:
- IS 2062 addresses the base steel used for GI strip.
- IS 2633 addresses testing of zinc-coating uniformity on galvanised articles.
- IS 3043 is the Code of Practice for the overall earthing system.
Keeping those roles separate makes the BOQ clearer, the quotation more accurate and the handover file easier to defend.
Review the current GI earthing strip range, then use the Strip Weight Calculator to convert an approved size and length into a planning quantity before requesting a quotation. If the specification calls for copper rather than galvanised steel, see copper earthing strip stocked in Bengaluru.
Related Guides
Related guides
- GI Earthing Strip Sizes — IS 3043 strip sizing and the full size chart.
- MTC Explained — identify its issuer, its consignment and its limits.
- Copper vs GI Earthing — when GI is enough, and when copper earns its premium.
Send the Size and the Standard You Have Been Given
Send the strip size, the quantity and the base-material requirement from your consultant’s schedule. We will tell you what we stock against it and which document comes with it.