How long can a cb scheme case report be used?

A: Three years from issue. Past that, testing is repeated. Within the three years, an unchanged structure can be cited for transfers to different countries as often as needed.

How many models does one report cover?

A: As many as the family allows. Identical shell, latch and sealing let cavity and insert variants share a report; a new parting line or opening needs its own assessment.

Does a report remove the need for national testing?

A: No. Japan adds ordinance items, Korea adds labelling and an audit, China needs a domestic applicant, India needs local samples. Acceptance of data is not exemption from testing.

How many samples should be prepared?

A: At least 2, one for testing and one retained. After drop or immersion work the tested unit is spent, so the retained sample must be drawn separately and kept for 3 years.

What does a four-country transfer cost in time?

A: About 12 weeks against 16 weeks, with cost near one third to one half of the four-country route.

Cb Scheme Case: CB Scheme for Cases

Quick answer: A cb scheme case report buys one test round instead of four: 2 samples, about 6 weeks, and a report usable for 3 years across 50-plus member countries.

One test round, two documents
Fifty-plus members, three tiers of acceptance
Six weeks against sixteen
A three-year report and the model family
Four differences that stop a transfer
FAQ

1. One test round, two documents

Two samples, 6 weeks, one report. The arithmetic only works if the report stays valid long enough to carry several shipments, which is why the 3-year life matters more than the test.

The certificate and the report do different jobs. The certificate is the single page a regulator reads: model, standard, verdict. The report is the file a destination authority works through line by line, holding raw data, photographs and any retest record. Send the certificate alone and the transfer stalls.

Document	Issued by	Content	Valid for	Use at transfer
Test certificate	Certification body	Model, standard, verdict	Tied to report	Main document
Test report	Accredited laboratory	Data, photos, retest record	3 years	Checked against national differences
National difference list	Accredited laboratory	Clauses that differ locally	Tied to report	Decides whether retesting is needed
Retest record	Accredited laboratory	Failed items, new values	Tied to report	Explains a structural change

Within the IECEE scheme, testing runs along two standards: IEC 62368-1 for electrical safety and IEC 60529 for enclosure protection. An unpowered shell needs the first applied only to the electrical assembly inside it, while the second covers the whole case. IP54 to IP67 is a change of sealing geometry and pressure relief, not of gasket thickness.

2. Fifty-plus members, three tiers of acceptance

The same report lands in one of three tiers. Tier one accepts the data and issues on document review, often inside 2 weeks. Tier two accepts it but demands national additions, usually plug type, nameplate language and a factory audit. Tier three rejects the conclusion and requires a domestic applicant to file again.

CB scheme case pallets wrapped in clear film, beige shells stacked eight high, black strapping over the load, plain white wall behind

Japan sits in tier two: its PSE route takes the data but adds ministerial ordinance items, Japanese nameplate text and a Japanese plug, roughly 4 weeks. Korea is also tier two with finer edges: Korean label text, an audit booked 2 weeks out, and a model string that must match the report exactly.

China is tier three. CCC does not let an overseas applicant swap a report for a certificate; a domestic entity must file again, and only the data can be cited.

India leans the same way: BIS registration needs local samples, and shipping plus clearance commonly adds 10 weeks.

Country	Accepts report	Extra requirement	Added time
Japan	Partly	Ordinance items, Japanese nameplate	4 weeks
Korea	Partly	Korean label, factory audit	6 weeks
China	No	Domestic applicant refiles	8 weeks
India	Partly	BIS registration, local samples	10 weeks

3. Six weeks against sixteen

A single-country test runs about 6 weeks: 5 days transport, 15 days testing, 10 days for one retest round. Four countries done separately start at 16 weeks, and one failure pushes the rest back.

The cb scheme case route compresses testing into one round and leaves the four destinations with difference work only, landing near 12 weeks.

Cost follows a 1 : 3 ratio: with a single-country test as 1, four separate tests approach 3, and one report transferred to four countries sits near 1.6. The gap comes from repeated samples and retests, not scope.

Route	Test rounds	Time	Report reuse
Single country	1	6 weeks	None
Report to 1 country	1 plus differences	8 weeks	About 80%
Report to 4 countries	1 plus 3 difference sets	12 weeks	About 70%
Four countries separately	4	16 weeks	None

4. A three-year report and the model family

Three years means the report can be cited repeatedly, not that the product may drift.

CB scheme case showroom shelves of black, orange and blue shells, a long platform holding large cases with metal corners, light wood floor

How the family is drawn decides how many variants one report covers. Identical shell structure, latch type and sealing method usually allow different cavity sizes and insert layouts to sit inside one family. Change the parting line or add an opening and the case counts as structurally modified, which triggers an assessment.

Two samples is the floor: one tests, one is kept. A destructive programme consumes the test sample, so a case dropped and immersed cannot double as the retained unit.

Keep the retained unit for 3 years, matching the report: a cavity-matched sample answers what photos cannot.

5. Four differences that stop a transfer

Most transfer rejections come from four items: plug and cord, nameplate language, factory audit, and applicant identity.

The first two are hardware and artwork, quick to fix. The last two set the schedule: audits in Korea and India take 2 weeks each, a Chinese applicant 4 weeks, and a shipment booked early simply waits.

Difference	Triggered in	What is added	Time
Plug and cord	Japan, Korea, India	New plug type and retest	1 week
Nameplate language	Japan, Korea	Japanese or Korean field	3 working days
Factory audit	Korea, India	First audit and closure	2 weeks
Applicant identity	China	Domestic legal entity	4 weeks

Schedule backwards from the sailing date: subtract 10 weeks for transfer and retest, then plan production. Done the other way, samples finish before certificates exist.

Conclusion

A cb scheme case programme saves samples, shipping and retest rounds rather than test items: one round, one report good for 3 years, and a door into 50-plus members. Put Japan, Korea, China and India into a 12-week plan before samples are moulded, and the 6 weeks of testing will not be wasted.

This article covers case-side specifications only and does not address any handling, loading or use of the contents.