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Type D power plug diagram
Old British plugBS 546Indian plug

Type D

Type D is an old British standard plug with three large round pins arranged in a triangular pattern. While phased out in the UK, it remains the dominant plug type in India, Nepal, and some African countries.

⏚ Grounded220-240V50Hz3 Pins5A

Technical Specifications

Pin Shape
Large round pins in triangle
Number of Pins
3
Grounded
Yes
Voltage
220-240V
Frequency
50Hz
Max Amperage
5A

Pin Dimensions

pin Length20.6mm
pin Diameter7.1mm
pin Spacing19.1mm
grounding Pin Diameter7.1mm

History

Type D was developed in Britain in 1947 as part of the BS 546 standard. After World War II, Britain switched to the Type G plug, but Type D remained in use in former British colonies, particularly in South Asia.

Safety Features

Type D features a grounding pin for safety. The large pin spacing makes it relatively safe, as small objects are less likely to make contact with live parts. However, it lacks the safety shutters found in modern designs.

Compatibility

Type D outlets may sometimes accept Type C plugs, though this varies by socket design. Type M plugs (larger variant) are sometimes found alongside Type D in the same countries.

Travel Tips

  • Essential for travel to India, Nepal, and Sri Lanka
  • Some hotels in India offer universal outlets, but don't count on it
  • Type D adapters can be hard to find outside of South Asia - buy before you go
  • Some modern buildings in India are transitioning to Type C/Type M

Frequently Asked Questions

What is a Type D power plug?

Type D is an old British standard plug with three large round pins arranged in a triangular pattern. While phased out in the UK, it remains the dominant plug type in India, Nepal, and some African countries.

Which countries use Type D plugs?

Type D plugs are used in 30+ countries, primarily in South Asia, Parts of Africa, Middle East. Popular countries include Bangladesh, Bhutan, Botswana, Chad, Democratic Republic of the Congo.

Is Type D a grounded plug?

Yes, Type D is a grounded (earthed) plug with 3 pins, providing protection against electrical faults.

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