SIST EN 50075:1997

SIST EN 50075:1997 is a Slovenian standard from SIST for flat non-rewirable two-pole plugs, 2.5 A 250 V, with cord, used to connect class II-equipment for household and similar purposes. It specifies a plug for indoor use, with no earthing contact and no special protection against ingress or water. The standard also applies, as far as reasonably possible, to plug portions of adapters and equipment such as razors, lamps with rechargeable batteries, and plug-in transformers.

What does SIST EN 50075:1997 specify?

SIST EN 50075:1997 specifies the product type, electrical rating, and intended use of a particular flat plug for household and similar applications. In practice, it tells manufacturers and buyers which kind of plug is covered and the environment in which it is meant to be used.

The scope is narrow and practical:

• flat non-rewirable two-pole plugs
• without earthing contact
• rated at 250 V a.c. and 2.5 A
• supplied with a cord
• intended for class II-equipment
• intended for indoor use
• no special protection against ingress or water

That combination matters because it defines a very specific connector for cord-connected equipment. If a product uses a different voltage, current, earthing arrangement, or outdoor/wet-location design, this standard is not the match.

The standard also extends, as far as reasonably possible, to plug portions of adapters and equipment such as razors, lamps with rechargeable batteries, and plug-in transformers. For product designers, that means the same plug rules may need to be checked at the appliance interface, not only on a standalone plug.

The operating environment is part of the scope as well. The plug is suitable for ambient temperatures not normally exceeding 25°C, with occasional exposure up to 35°C. That is useful for deciding whether a product fits normal indoor rooms and similar conditions.

What are the key requirements of SIST EN 50075:1997?

SIST EN 50075:1997 focuses on a fixed plug form with defined electrical limits and a defined use environment. The most important points are the plug construction, the rating, the indoor-only intent, and the way the standard reaches into adapters and appliance plug portions.

• Flat, two-pole, non-rewirable construction - The plug is not meant to be opened and reconnected by the user. In practice, this means the cord and plug are treated as a fixed assembly, which reduces user-assembly variation.
• No earthing contact - The plug is for equipment that does not use a protective earth connection. For buyers and designers, that means it is aligned with class II-equipment rather than earthed appliances.
• Rated 250 V a.c. and 2.5 A - The plug is defined for a specific electrical load. This matters when checking compatibility with appliances, cords, and national supply conditions.
• Supplied with a cord - The plug is intended as part of a cord-connected product, not as a loose field-wired part. In practice, manufacturers need to control the plug-cord assembly as a unit.
• Indoor use only, with no special ingress or water protection - The scope excludes wet or harsh exposure by design. This is important for product selection because it points to normal dry indoor environments.
• Temperature use range - The plug is suitable for usual ambient temperatures up to 25°C and only occasional short exposure up to 35°C. That helps with placement and storage decisions.
• Appliance plug portions are included where reasonably applicable - The standard reaches beyond the standalone plug to the plug part of some equipment and adapters. This matters for integrated products such as razors, rechargeable lamps, and plug-in transformers.

What terms does SIST EN 50075:1997 define?

SIST EN 50075:1997 uses a small set of technical terms that shape how the plug is understood and applied.

• flat non-rewirable two-pole plug - A plug with a flat form, two current-carrying poles, and a construction that is not intended to be rewired by the user.
• earthing contact - The contact that would provide a protective earth connection; this standard covers plugs without it.
• rated voltage - The voltage level the plug is designed to handle, here 250 V a.c.
• rated current - The current level the plug is designed to carry, here 2.5 A.
• class II-equipment - Equipment intended to provide protection by insulation rather than by a protective earth connection.
• plug portions - The plug end or plug interface that forms part of an adapter or appliance rather than a separate loose plug.
• ingress or water protection - Protection against entry of moisture or water, which is not specially provided here.

Who uses SIST EN 50075:1997?

SIST EN 50075:1997 is used by people who design, make, test, buy, or approve plug-connected household equipment. It is especially relevant when the product uses the exact plug type covered by the standard.

Typical users include:

• plug and cord assembly manufacturers
• appliance manufacturers for class II-equipment
• makers of adapters, razors, rechargeable lamps, and plug-in transformers
• test laboratories checking product conformity
• quality managers and buyers specifying acceptable plug types
• compliance and certification staff working on household and similar equipment

For engineering teams, the standard is useful when defining a connector interface and checking whether a product belongs to this plug family. For purchasing teams, it helps specify the right plug form and rating for sourced equipment.

What changed in SIST EN 50075:1997 from the previous edition?

SIST EN 50075:1997 is identified as identical to EN 50075:1990. The available document information states the equivalence, so the Slovenian standard adopts that European text for this reference.

What does the SIST EN 50075:1997 document contain?

SIST EN 50075:1997 contains the formal standard text for a defined plug type, together with its scope and identification details. The available material shows the standard title in several languages and the classification under plugs, socket-outlets, and couplers.

It also contains the scope statement that sets the product limits, electrical rating, intended use, and temperature conditions. That scope is the key part for design and procurement checks because it tells readers what type of plug is covered.

The document information identifies its relationship to EN 50075:1990 and places it in the plugs, socket-outlets, couplers area. For users, that signals that the standard belongs to the family of connector standards rather than a general appliance safety document.

Because the available text shown here is limited to the front matter and scope, the practical takeaway is the exact plug definition, the intended indoor application, and the use of the standard for appliance plug portions where applicable.