What are the standard plug and socket ratings in India?

The standard ratings are 6 A, 10 A, and 16 A at a rated voltage of 250 V (Clause 9, Table 2).

Are shutters mandatory for electrical sockets?

Yes, as per the 2019 revision, all socket-outlets must be provided with shutters to prevent accidental contact (Clause 11.6).

What is the difference between a 6A and 16A socket?

They have different pin diameters and spacing (as per Standard Sheets 1 and 2) to prevent a high-power 16A plug from being inserted into a lower-rated 6A socket and circuit.

What is the main type of plug and socket specified in IS 1293?

The code primarily specifies the dimensions for Type D plugs and sockets, which is the 3-pin standard widely used across India.

IS 1293

: 2019

Plugs and socket-outlets of rated voltage up to and including 250 V and rated current up to and including 16 A

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This standard specifies the requirements and testing methods for plugs and socket-outlets with a rated voltage up to 250 V and rated current up to 16 A, intended for household and similar purposes in India. It covers crucial aspects like dimensions, electrical safety (including mandatory shutters), mechanical strength, and material properties to ensure interchangeability and safe operation. The code is largely harmonized with the international standard IEC 60884-1.

Specifies requirements for plugs and fixed or portable socket-outlets for household and similar purposes.

Quick Reference Values

Standard Rated Voltage250 V

Standard Rated Currents6 A, 10 A, 16 A

Max Terminal Temperature Rise50 K

Mandatory Shutter RequirementShutters are compulsory for all socket-outlets

Glow Wire Test Temperature (current carrying parts)850 °C

Minimum Withdrawal ForceNot less than 1.4 N per pin

Standard Plug/Socket ConfigurationType D (3-pin)

Practical Notes

The 2019 revision makes shutters mandatory for all socket-outlets, a major safety improvement over the 2005 version.

Avoid using non-standard 'universal' or 'multi-pin' sockets as they often provide poor contact, leading to overheating and significant fire risk.

Ensure the correct rating is used: 6A for small appliances (lights, fans, chargers) and 16A for high-power appliances (geysers, air conditioners, heaters).