Power cord plug types: an introduction for buyers
Every power cord ends in plugs and connectors, and those ends decide whether a cord fits at all. This article introduces plug types and connector families in general terms, for buyers who are still learning the vocabulary. It describes no specific product and promises no fit for any device.
Copper cable-route diagram — the site's recurring motif. It is a schematic of a cord as a route from a power source to a device, not a photograph of a product, factory or customer project.
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Plugs, connectors and inlets: three words
Three words organise the vocabulary. A plug is the end that goes into an outlet or a socket; a connector is the end that goes into a device, or the general word for either end; an inlet is the socket on the device itself that accepts a connector. A complete cord has two ends, and both must fit: the plug must fit the power source, and the connector must fit the device's inlet. A buyer who names only one end has described half a cord. The inquiry should name both ends, or describe the source and the device fully enough that the supplier can identify both. Where the ends are standard and known, naming them is the fastest route to a matching proposal; where they are not known, describing them — shape, visible pins, markings — lets the supplier identify them.
Fit is pass-or-fail in a way that length and setting are not. A cord that is slightly too short can sometimes be rerouted; a cord whose plug does not fit cannot be used at all, and a cord whose connector does not fit the device's inlet cannot be used either. That is why connector questions belong at the start of an inquiry, not at the end: they filter the entire range before any other question matters. A buyer who starts with devices and ends, rather than with length or price, will rarely waste a round of correspondence on a cord that cannot fit.
Families, not single shapes
Plugs and connectors come in families: standard shapes shared across makers, so that equipment, cords and power sources from different sources can connect. The IEC system standardises several families for equipment power, and the C13 family, covered on the C13 guide page, is among the most familiar for computing and office equipment. Other families serve other equipment classes, other regions' outlets, and other device types. The family idea is what makes replacement cords possible: a device with a standard inlet can accept a cord from any maker whose connector belongs to the same family, provided the cord is otherwise suited to the device and setting.
Families also create a trap: two shapes that look similar may belong to different families, and a shape that fits loosely may not be a correct fit. Visual similarity is not compatibility, and a buyer should not force a connector that does not seat cleanly, or assume a loose fit is acceptable. Where the family is uncertain, describe the inlet and the outlet — their shapes, their markings, and the device and source they belong to — and let the supplier identify the family. A guessed family name that is wrong costs a round of correspondence; a description lets the supplier identify the family correctly, and the written confirmation of the proposed item's ends closes the question.
Regional outlets and travelling equipment
Outlets vary by region, and equipment that travels — or is bought in one region and used in another — meets that variation directly. A cord bought for one region's outlets may not fit another region's, even where the device end is identical, because the plug end is region-specific. Buyers equipping devices for another region should name the region of use in the inquiry, not just the device, so the supplier can propose a cord whose plug end matches the outlets where the device will actually run. The same applies to equipment fleets spanning regions: a fleet is not one plug job but several, and the inquiry should list the regions involved.
Detachable cords turn regional variation from a device problem into a cord problem, which is a benefit: the device stays, and only the cord changes. That benefit depends on the device having a standard inlet family, which most computing and office equipment does. Where a device's cord is fixed rather than detachable, regional variation is a device question, not a cord question, and the buyer should check the device's own documentation. Either way, the inquiry should state the region of use explicitly, because a supplier cannot infer it from the device alone.
Describing ends you cannot name
Many buyers cannot name their plug or connector family, and that is normal: families are a specialist vocabulary, and buyers meet it only when buying a cord. The remedy is description, not guessing. Describe the outlet: its shape, the number and arrangement of its holes or slots as visible, and any markings. Describe the device inlet the same way: its shape, its pins or holes, and any markings. Describe the device and the source themselves: what they are, where they were bought, and what they do. A supplier can identify a family from a full description far more reliably than from a guessed name, and the written confirmation of the proposed item's ends is the step that verifies the identification.
Photographs can help a description, where the inquiry channel allows them: a clear view of the outlet and of the device inlet, with any markings legible, is often enough for identification. But the written description remains the record: it is what the supplier confirms against, and what the buyer can check on delivery. A buyer who describes both ends, states the device and setting and distance, and asks for written confirmation of the proposed item's ends, has asked the complete connector question, and will rarely receive a cord that does not fit.
From plug types to a purchase
Plug types are the start of a power cord purchase, not the whole of it. After fit comes setting, distance, use pattern and written confirmation — the sequence the buying guide walks through in order. A buyer who has identified both ends should continue through that sequence rather than stopping at fit: a cord that fits but is too short, wrong for its setting, or unconfirmed for its devices is still the wrong cord. The power cord category page is the starting point for the family, and the C13 guide covers the most familiar equipment family in more depth.
The habit to keep from this article is simple: name both ends, or describe both ends fully, before any other buying question. Fit filters everything else, and a purchase that starts with fit will rarely waste time on a cord that cannot connect. Everything after fit — setting, distance, pattern, confirmation — builds on a cord that can actually plug in at both ends, which is the minimum a power cord must do, and the foundation every other quality rests on.
Related pages
C13 guide · Power cords · Buying guide · Computer cords
How to place an inquiry, step by step
- Send the use and the setting. Tell us what the cord will power, where it will run, and how far it must reach — indoors or outdoors, at home, in an office, in a workshop, or beside a vehicle or generator.
- Name the category. Pick one of the four main categories — power cords and extension cords, AC/DC power adapters, DC converter cable, or solar cable — and say whether you need a standard category item or a custom inquiry.
- Confirm specifications and terms in writing. Ask the supplier to confirm the specification of the item it proposes, the order quantity, the lead time and the certificate position for that item, in writing, before payment. Certificates are available upon request.
- Agree the sample step. Confirm whether the next step is a sample of a category item or a discussion of a custom design, and what check you will run on arrival — fit, reach, or behaviour in its real setting.
Send all of this in one message through the contact page: the use, the setting, the distance, the category, the quantity you have in mind, and the documents you need. That is the whole inquiry.
What to send us now
Send one message with the use (what the cord will power), the setting (where it will run), the distance it must cover, the category you need, the quantity you have in mind, and the documents you need — noting that certificates are available upon request. Say whether you need a standard category item, a custom inquiry, or a bulk inquiry. Use the contact page form. A message that specific is what turns four broad categories into a short, answerable question.