A Type A inspection body is an independent third-party organisation that has no stake in the items it inspects: it does not design, make, supply, install, buy, own, use or maintain them. The classification comes from ISO/IEC 17020, the international standard for inspection bodies, and in India accreditation against it is granted by the National Accreditation Board for Certification Bodies (NABCB). Tender authorities ask for Type A because it gives them the clearest assurance of impartiality.
ISO/IEC 17020 in brief
ISO/IEC 17020 specifies requirements for the competence, impartiality and consistent operation of bodies that perform inspection. Inspection here means examining a product, process, service or installation and determining its conformity with specified requirements, often using professional judgement as well as measurement.
That makes it different from:
- ISO/IEC 17025, which covers testing and calibration laboratories, and
- ISO/IEC 17065, which covers product certification bodies.
In India, NABCB accredits inspection bodies against ISO/IEC 17020. NABCB is a constituent board of the Quality Council of India and, according to its website, a signatory to the international mutual recognition arrangements of the International Accreditation Forum and the International Laboratory Accreditation Cooperation, which supports acceptance of accredited inspection reports across borders.
Type A, Type B and Type C
The 2012 edition of the standard classifies inspection bodies by their independence. NABCB’s inspection bodies page summarises the three types:
| Type | Who it inspects for | Independence requirement |
|---|---|---|
| Type A | Any client, as a third party | Not engaged in design, manufacture, supply, installation, purchase, ownership, use or maintenance of the items inspected |
| Type B | Only the organisation it belongs to | Forms a separate, identifiable part of the parent; inspection staff kept separate from other functions |
| Type C | Its own organisation and external clients | May be part of an organisation involved in design or manufacture; must have safeguards to separate inspection from those activities, and the same person must not do both for the same item |
Two points are often misunderstood:
- The types measure independence, not quality. A Type C body can be fully competent. It simply has a relationship with the items that a buyer may need to manage.
- Type A is about the organisation, not just the inspector. Independence must hold at the level of the legal entity and any related companies, not only for the individual sent to the factory.
Why tenders and buyers ask for Type A
Utilities, PSUs, EPC contractors and government departments often specify a “NABCB-accredited Type A inspection agency” for pre-dispatch or stage inspection. The reasons are practical:
- No commercial conflict. The inspector cannot benefit from a pass or fail, because the body does not make, sell or use the equipment.
- Accountability. Accreditation means the body’s procedures, records, inspector competence and impartiality controls are independently assessed and periodically re-assessed.
- Defensible decisions. If a lot is rejected or accepted and the decision is later challenged, an accredited third-party report carries more weight with auditors and vigilance.
- Consistency across suppliers. The same independent body can inspect bids from several manufacturers on the same basis.
How to verify an inspection body
A logo on a letterhead is not enough. Before appointing an agency, or when evaluating a bidder’s nominated agency:
- Search the NABCB directory of accredited bodies for the organisation’s name or certificate number.
- Check the type shown on the certificate. If the tender asks for Type A, a Type C accreditation does not meet the requirement.
- Check validity dates, and that the accreditation is not suspended.
- Read the scope. Accreditation is granted for specific product groups, standards and inspection stages (for example, stage-wise or final inspection of transformers). An agency accredited for pressure vessels is not accredited for energy meters.
- Check the accredited locations. Only the offices listed on the certificate are covered for the activities shown.
- Ask for the accredited report format. Reports issued under accreditation should identify the accreditation and stay within scope.
What a good tender clause looks like
Vague clauses invite disputes. A clearer formulation specifies:
- accreditation by NABCB (or an accreditation body that is a signatory to the ILAC MRA for inspection) to ISO/IEC 17020 as a Type A body;
- a scope covering the specific equipment and inspection stage being procured;
- validity at the time of inspection, not only at bid submission;
- independence from the supplier and its group companies; and
- the standards and tests the inspection must witness or verify, along with sampling rules.
Note: ISO/IEC 17020 was revised in 2026. Accreditation bodies including NATA and the Singapore Accreditation Council report that ISO/IEC 17020:2026 was published in March 2026, that it reworks the independence categories into “Type A” and “Type non-A”, and that they are allowing a transition of about three years. At the time of writing, NABCB’s accreditation certificates still cite ISO/IEC 17020:2012, and we have not seen a published NABCB transition policy for the 2026 edition. Type A remains the category to ask for; buyers who write long-term framework contracts may want to refer to “ISO/IEC 17020 (current edition)” rather than a specific year.
Accreditation, certification and empanelment are different
Buyers sometimes treat these terms as interchangeable. They are not:
| Term | What it means | What it tells a buyer |
|---|---|---|
| Accreditation (ISO/IEC 17020) | An accreditation body such as NABCB has assessed the inspection body’s competence and impartiality for a defined scope | The body is competent to inspect the listed items at the listed stages |
| ISO 9001 certification | A certification body has audited the organisation’s quality management system | The organisation runs a managed system; it says nothing specific about inspection competence |
| Empanelment | A buyer or authority has added the agency to its approved list | The agency met that buyer’s criteria at the time, which may or may not include accreditation |
For a tender that calls for an accredited Type A inspection body, only the first row answers the question.
Type A inspection in practice
For electrical equipment, a Type A inspection assignment typically includes:
- reviewing the purchase order, approved drawings, guaranteed technical particulars and quality plan;
- checking the calibration status of the manufacturer’s test instruments;
- witnessing routine and acceptance tests on samples selected by the inspector;
- verifying dimensions, markings, packing and quantities; and
- issuing an inspection report or certificate stating what was inspected, against which requirements, and the result.
The value of independence shows most clearly when results are marginal or a lot is rejected. An inspector with no stake in the outcome can record the facts plainly.
How Aaditech can help
Aaditech Inspections & Services is accredited by NABCB as a Type A inspection body under ISO/IEC 17020:2012, certificate IB 024. Our accredited scope covers electrical equipment, including cables and conductors, energy meters, transformers, switchgear and controlgear, capacitors, motors, lamps, wiring accessories and insulating materials, with stage-wise and final inspection. For buyers and tender authorities who need independent inspection of electrical equipment, see our third-party inspection service.