In electrical infrastructure, the
safety and reliability of grounding and earthing systems are of paramount
importance. One of the most widely used materials in these systems is galvanized steel wire strand, commonly
referred to as galvanized strand for
earthing. These conductors play a critical role in dissipating fault
currents safely into the ground, protecting both equipment and human life from
electrical hazards.
To regulate and ensure the quality and
safety of such essential components, the Bureau
of Indian Standards (BIS) has established the Indian Standard IS 12776:2002, which governs the manufacturing and
performance requirements for galvanized steel wire strands used in earthing
systems. In line with this standard, the Ministry
of Commerce and Industry has introduced a draft Quality Control Order (QCO) in 2025 under which BIS
certification will be mandatory for galvanized strands intended for earthing
applications.
Galvanized strand for earthing is made
by twisting together multiple galvanized steel wires to form a strong, durable
conductor. These strands are coated with zinc (galvanized) to protect them from
corrosion, making them ideal for outdoor and underground applications where
they may be exposed to moisture, chemicals, or varying environmental
conditions.
The strength and conductivity of the
stranded wire, combined with its corrosion-resistant properties, make it
suitable not just for earthing but also for applications such as guy wires in
telecommunication and power transmission systems, overhead ground wires, and
even in structural reinforcement.
The Indian Standard IS 12776:2002, titled “Galvanized Strand for Earthing”,
provides comprehensive specifications that manufacturers must comply with to
ensure the strand is suitable for use in electrical earthing systems. This
standard lays down the requirements concerning the mechanical strength, dimensional
accuracy, galvanizing quality, and
electrical performance of the
product.
It covers key technical aspects such
as:
These requirements aim to ensure that
the galvanized strand can withstand both the electrical and environmental
stresses it may encounter throughout its operational life.
To conform to IS 12776:2002 and
qualify for BIS certification, manufacturers must subject their products to a
series of rigorous tests. These tests verify not only the raw material quality
but also the performance and longevity of the finished product. Some of the key
tests include:
These tests are conducted at various
stages of production and are often witnessed or audited by BIS representatives
during the certification process.
With the increasing emphasis on safety
and quality, the Ministry of Commerce
and Industry has proposed the Steel
Wire Ropes, Strands, Ring Net Panels, Rope Net Panels and Rolls (Quality
Control) Order, 2025, which includes galvanized strands for earthing under
mandatory certification. Once implemented, this order will require all
manufacturers—domestic and international—to obtain BIS certification under Scheme-I of the BIS (Conformity Assessment)
Regulations, 2018.
This certification process includes:
Products that meet the standards will
be authorized to bear the ISI mark,
indicating conformity with Indian quality and safety norms.
BIS certification under this standard
involves a rigorous conformity assessment process to ensure product quality and
adherence to regulatory norms. The steps typically include:
To apply for BIS certification, manufacturers need to submit the following documents:
● Application form
● Manufacturing process details
● Quality control plan
● Test reports from BIS-approved laboratories
● Factory layout and equipment details
● Proof of business registration
● Product specifications and technical details
● Declaration of conformity to Indian standards
Additionally, manufacturers may be required to provide proof of compliance with environmental and safety regulations, depending on the specific type of product being certified.
Earthing systems are integral to the
safe operation of every electrical installation. Any compromise in the quality
of conductors used in grounding can lead to serious risks, including equipment
failure, electrocution, and fire hazards. Ensuring that galvanized strands meet
BIS standards through proper certification significantly reduces these risks.
For government tenders, utility
contracts, and large-scale infrastructure projects, BIS certification is not
just a legal necessity but a mark of credibility and trust. It provides
assurance to project developers, consultants, and end-users that the product
has undergone comprehensive quality checks and complies with national
standards.
As India advances toward enhanced
infrastructure and electrical safety norms, the role of certified materials
like galvanized strand for earthing
becomes increasingly vital. The implementation of IS 12776:2002 and its
mandatory BIS certification under the forthcoming Quality Control Order will
set a higher benchmark for safety and performance in electrical grounding
systems.
Manufacturers looking to enter or
expand in the Indian market must act proactively to align with BIS
requirements. This not only ensures legal compliance but also builds long-term
trust with customers, contractors, and regulatory authorities.
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