A factory acceptance test is usually arranged for one reason: somebody wants to see the cable before it is on a ship.
What actually gets checked depends on what was agreed in the contract, and an inspection with no agreed scope tends to produce a signature and very little else.
The useful preparation is a short list of what will be seen, measured and signed, circulated before the drums are built rather than after.
What Gets Checked Before the Drums Leave
Four families of check appear in most programmes.
| Check | What it covers | Applies to |
|---|---|---|
| Conductor resistance | Confirms the conductor meets its class | Every length |
| Voltage and insulation check | Confirms the insulation holds its duty | Every length |
| Dimensions and construction | Diameter, thickness, sheath and armour | Sample or as agreed |
| Identification and packing | Drum marking, length and protection | The consignment |
Which of these applies to every drum and which to a sample is a contract decision.
A factory acceptance test starts with an agreed scope, because an inspection without one produces a signature and no evidence.
Where a Witness Adds Value
A witness does not repeat the manufacturer's measurements. The value is in watching how the measurements are made, how the instruments are set up, and how the results are written down.
A witness who arrives with the specification in hand can also settle small questions on the spot, such as whether a drum marking matches the agreed format, instead of turning them into correspondence afterwards.
That works when the visit is planned. A factory acceptance test arranged after the testing is finished lets a witness inspect the drums but not the test, and the two are not the same thing.
Cable inspection at works covers routine checks on every length plus the checks that apply to the drums, the packing and the identification.
Reading the Test Certificate
Five elements turn a certificate into evidence.
Drum or length reference
Without an identifier that matches the drum on arrival, the record cannot be tied to the cable being installed.
Measured values beside limits
A figure on its own says little. The specified limit next to it says whether the length passed.
Method and conditions
Temperature and method both affect a reading, so both belong on the record.
Instrument and calibration
The equipment used and the date of its calibration are part of the result rather than a formality.
Signature and date
Who tested it, who witnessed it, and when the record was completed.
Witness testing cable adds a second pair of eyes and a second signature, and it works best when the programme is fixed in advance.
Documents That Travel With the Drums
Four documents cover most consignments.
- The test records for the lengths in the consignment, tied to the drum numbers.
- The packing list, including drum numbers, lengths and gross weights.
- The drum marking format, where the contract specifies one, so the receiving check is quick.
- Any deviation or concession agreed before shipment, in writing.
A consignment that arrives with the first three and without the fourth has usually had a conversation nobody recorded.
Pre shipment inspection cable usually sits between the works test and the loading date, which is why the notice period matters.
Case: A Record That Did Not Match the Drum
Situation: A contractor received a consignment with test records attached, and the receiving check found the lengths on the drums did not match the lengths on the records.
Finding: The drum numbers had been reused from an earlier project for internal purposes, and the records referenced those numbers instead of the delivery. The cable was correct and the paperwork disagreed with it.
Decision: The consignment was held while the records were reissued against the delivery numbers, and the contract was amended so drum marking matched the shipping documents.
Result: Later consignments cleared the receiving check in minutes, because the drum number on the cable was the same one printed on the record.
A cable test certificate without a drum reference is hard to tie back to the cable that arrives on site.
Who Owns Which Part
Four parties, four different jobs.
| Party | Owns | Provides |
|---|---|---|
| Manufacturer | The test programme and the records | Test results and packing list |
| Buyer | The specification and the scope | Contract and acceptance criteria |
| Witness or inspector | Independent observation | A report against the agreed scope |
| Carrier and receiver | The consignment in transit | Delivery and receiving records |
The boundaries between those rows are worth writing down before the visit.
Sampling Versus Testing Every Length
A factory acceptance test does not treat every check the same way. Some are performed on each length produced, and others on a sample taken from the batch.
A sample check describes the batch it came from. A routine check describes the individual length, which is what matters when a fault later has to be traced back to a drum.
The contract should say which checks are routine, which are sample based, and what happens if a sample fails. Silence on that last point is where arguments begin.
Planning the Visit
Three arrangements separate a useful visit from a long day.
Fix the programme
Testing happens at a point in production that cannot be moved freely, so the visit date has to be agreed around the real schedule.
Confirm the scope in writing
Which tests will be seen, which records will be reviewed, and which drums will be available on the day.
Agree what a failed result triggers
Re-test, rework or rejection, and who decides, settled before anyone is standing in the test bay.
Things That Get Missed
The gaps tend to be the same ones.
- A scope agreed by email that never made it into the contract.
- Test records issued without drum references.
- A witness visit timed before the drums in question have been produced.
- Packing and marking checked only after the consignment has been loaded.
- Deviation notes agreed verbally and never issued.
None of those gaps shows up until the consignment is on site.
Closing the Loop After the Visit
The visit ends with a report, and the report is what makes the factory acceptance test count later. A short record of what was seen, what was tested and what was agreed is worth more than a detailed note that arrives a month after the drums.
Where a deviation was accepted, the acceptance belongs in the same record, with the reason and the name of whoever agreed it.
That file then does the work at the far end, when a receiving check, an installer or a future maintenance team needs to know what was actually supplied.
RFQ Inputs for Works Testing
These details let the test programme and the shipment records line up.
- the construction and quantity being ordered
- which checks are routine on every length and which are sample based
- the acceptance criteria for each check
- whether witnessing is required, and at which stage of production
- the notice the works needs before a witnessed test
- the drum marking format required for the delivery
- the documents that must travel with the consignment
- how a failed result will be handled, and who decides
Technical references such as IEC 60502, IEC 60228 and IEC 60332 can align cable construction and test terminology. The approved project specification, applicable local rules and qualified design authority still govern the final system decision.
JINCHUAN Cable Support for works testing and shipment documentation for cable orders
JINCHUAN Cable records the tests applied to each length and issues the results against the drum numbers in the consignment, so a factory acceptance test has something to refer to.
Review the cable range and the manufacturing profile, then send the scope so the test programme and the records match it.
Write the scope before the drums are built, and the factory acceptance test produces evidence instead of a handshake.
FAQ
What is a factory acceptance test for cable?
It is an inspection at the works covering the tests and checks agreed in the contract, carried out on the cable and the consignment before shipment.
Which checks are performed on every length?
Conductor resistance and the insulation voltage check are normally routine, while dimensional and construction checks may be sampled.
Does a witness have to be present for the test to be valid?
No. The programme runs against the specification, and a witness adds independent observation rather than making the result valid.
How far ahead should a witnessed test be booked?
Far enough that the works can schedule the drums for that date. The notice period is best agreed in the contract.
What should be on the test record?
A drum reference, the measured values beside the specified limits, the method and conditions, the instrument and its calibration, and a signature with a date.
What is the difference between a routine check and a sample check?
A routine check applies to each length produced, while a sample check describes the batch the sample came from.
Can the visit be combined with a pre shipment inspection?
Often yes, but the two look at different things, and packing and marking can only be confirmed once the consignment is assembled.
What happens if a result fails?
Re-test, rework or rejection, decided under the contract and agreed before the test rather than during it.
Does it replace site testing?
No. The works test covers the cable as supplied, and site testing covers the installation after it has been laid and jointed.
How can JINCHUAN Cable support a works visit?
JINCHUAN Cable can schedule the drums for an agreed date, provide the test records for the consignment and confirm the marking that will be applied.
