A buyer orders one product for five countries and expects one carton. Then the first shipment lands and four markets come back with the same complaint: the plug does not fit.
The failure is not that anyone forgot. It is that the power cord was treated as a packing item when it is really a certified component, and it was specified at the end of the project when it has to be decided at the start.
Plug shape and voltage are two separate problems
The first thing to separate is the two things everyone merges.
Plug shape is about the socket in the wall. It varies by country, and a few countries have their own regardless of their neighbours: the UK, Brazil, South Africa, India, Switzerland, Italy.
Voltage and frequency are about what the device can accept. Most modern switch-mode supplies are labelled for a wide input range, and those genuinely do run on both. Heater elements and motors usually do not, and they are single-voltage parts.
So the same device can be electrically fine in five countries and still be unsellable in four of them because nobody ordered the right cord.
The two are independent, and "100-240V" on the label answers only the second one.
The cord carries its own approval
Here is the part that catches people.
A detachable power cord is not covered by the approval of the device it plugs into. The cord is a component with its own approval, and the combination is what gets tested. When a product ships with a cord, the cord's approval and the moulded plug's approval are part of the file.
That is why a product approved with a European cord is not automatically approved with a British one. It is not a paperwork technicality. The plug differs, the cord standard differs, and the test file has to name what was actually tested.
It is also why the fix that seems obvious is the one that creates the problem. A distributor who cannot sell the fitted cord and swaps it for a local one has changed a certified part, and the approval no longer describes the product in the box.
Fixed or detachable changes the answer
Which cord arrangement you choose is a design decision with regulatory consequences.
A fixed, captive cord is part of the appliance. It is tested as part of the product, and it cannot be swapped by anyone downstream, which is exactly the protection you want. It also means the product SKU has to be built for its market, because you cannot change the cord at the destination.
A detachable cord with a standard inlet, such as an IEC C13 or a figure-8, separates the two approvals. The device is approved for the inlet, and the cord is approved as a cord. This is the arrangement that lets one product serve many markets, because the local cord can be fitted in the destination country or packed at the factory.
The cost of the second approach is the inlet itself and the volume behind it. The benefit is that you stop shipping five variants of the same housing.
The markets that need their own approvals
Then there are the countries where the cord is the smallest of the problems.
Brazil wants INMETRO. India wants BIS registration. Korea wants KC. Russia and Eurasia want EAC. These are national approvals held by a local entity, and they are a different class of thing from CE or FCC. They are usually applied for by the importer, not the factory, and they take months.
A supplier's honest answer here is narrow. For a smart switch or a doorbell, standard support typically covers CE, FCC, RoHS, UKCA, CCC and PSE. That list has apparent breadth and one conspicuous gap: it does not include UL or ETL, which is what the North American market actually asks for on electrical safety.
So the right way to handle a market outside that list is not to assume coverage. It is to ask, per market, whether there is a live file, and to treat "we can support the testing" as a different sentence from "we hold the approval."
What to put in the RFQ
Four lines, and they belong in the first email rather than after the sample.
The target market list, given before sampling and not after. This single change moves every downstream decision, because plug type, cord approval, label format and manual language all derive from it.
Plug type and cord length, named per market. "EU plug" is not a specification; there are several, and the length is a separate choice that affects both cost and the carton.
Whether the cord is fixed or detachable, and if detachable, which inlet. This decides whether market variants are five SKUs or one SKU with five cords.
Nameplate and manual localisation. The rating label has to show the voltage and frequency for the market, and several markets require the manual in the local language before the product can be sold.
Why this saves more than it costs
Every one of these is a decision that costs almost nothing at the tooling stage and costs a reprint, a re-test, or a rejected shipment later.
The pattern that produces the most damage is a buyer who specifies the product in detail, approves the sample, places the order, and only then mentions the countries. At that point the cord is the least of it, because the label, the carton, the manual and possibly the certification file were all built for an answer nobody had given yet.
It is a small subject with an outsized bill attached to it, and it is settled in one email if it is sent early enough.
Sourcing references: XingLiao ODM/ODM and the manufacturing programmes.
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