SIST EN 50075:1997

Overview

SIST EN 50075:1997 specifies requirements for flat non-rewirable two-pole plugs, rated 2.5 A and 250 V AC, supplied with a cord for indoor connection of class II equipment. As a harmonized Slovenian standard identical to EN 50075:1990, it covers flat non-rewirable plugs without earthing contact, designed for safe and reliable use in household and similar environments. The standard is managed by the Slovenian Institute for Standardization (SIST) and supports equipment operating at ambient temperatures up to 25°C, occasionally reaching 35°C.

This standard ensures interoperability and safety for electrical plugs used in a broad range of domestic and small-scale commercial applications, contributing to the overall quality and consistency of electrical installations.

Key Topics

• Flat Non-rewirable Two-Pole Plugs
  The standard details the design, dimensions, and essential safety requirements for flat style, non-user-serviceable two-pole plugs. These are intended for use with class II (double insulated) electrical equipment, where no earthing contact is needed.

• Electrical Ratings
  Specifies a rated current of 2.5 A and a rated voltage of 250 V AC, appropriate for typical low-power domestic devices.

• Cord Integration
  Describes plugs supplied with an attached cord, ensuring secure and reliable connections. Rewiring by the end-user is not permitted, increasing safety.

• Indoor Use and Environmental Conditions
  Limits use to indoor environments with no special protection against water ingress, supporting reliable performance in standard domestic indoors where the ambient temperature does not normally exceed 25°C but may reach 35°C occasionally.

• Interchangeability and Compatibility
  Stipulates requirements to enable safe connection with corresponding socket-outlets, supporting uniformity across brands and equipment.

Applications

SIST EN 50075:1997 is widely applied in the manufacturing and certification of:

• Household Appliances
  Often specified for devices such as electric shavers, kitchen gadgets, desk lamps, and low-power domestic electronics fitted with a cord and plug.

• Class II Equipment
  Used for equipment designed with double insulation and no earth connection, guaranteeing user safety via construction rather than grounding.

• Adapter Plugs and Plug-in Devices
  Pertains to plug portions of adapters or portable devices including chargers, plug-in transformers, and battery-driven appliances where the plug design is integral.

• Small Office Equipment
  Includes certain small office electronic products designed for household voltage systems without earthed plugs.

The standard's requirements, such as fixed cord attachment and defined ratings, are specifically intended to minimize electrical hazards and ensure safe everyday use by non-technical users.

Related Standards

For broader context and compliance, consider the following related standards:

• EN 50075:1990
  The European standard on which SIST EN 50075:1997 is based, widely recognized across Europe.

• IEC 60884-1
  General standards for plugs and socket-outlets for household and similar purposes, providing overarching product requirements.

• EN 60309 Series
  Covers plugs, socket-outlets, and couplers for industrial purposes, relevant for higher current and outdoor applications.

• SIST EN 60320 Series
  Specifies requirements for appliance couplers for household and similar general purposes.

By adhering to SIST EN 50075:1997 and these related standards, organizations ensure the safe, standardized production and application of electrical plugs and equipment across domestic settings, promoting safety, compatibility, and consumer confidence.