India has standardised on a plug which was originally defined in British Standard 546 (the standard in Great Britain before 1962). This plug has three large round pins in a triangular pattern. It is rated at 5 amps. Type M, which has larger pins and is rated at 15 amps, is used alongside type D for larger appliances in India, Sri Lanka, Nepal and Namibia. Some sockets can take both type M and type D plugs.
Although type D is now almost exclusively used in India, Sri Lanka, Nepal and Namibia, it can still occasionally be found in hotels and theatres in the UK and Ireland. It should be noted that tourists should not attempt to connect anything to a BS546 round-pin outlet found in the UK or Ireland as it is likely to be on a circuit that has a special purpose: e.g. for providing direct current (DC) or for plugging in lamps that are controlled by a light switch or a dimmer.
Countries Using Type D Electric Plug/Socket - Afghanistan, Bangladesh, Benin, Botswana, Cameroon, Chad, Dem. Rep. of Congo (Zaire), Dominica, Ecuador, El Salvador, Ethiopia, French Guiana, Ghana, Greece, Guadeloupe, Guyana, Hong Kong, India, Iraq, Jordan, Kenya, Lebanon, Libya, Macao, Madagascar, Maldives, Martinique, Monaco, Myanmar (Burma), Namibia, Nepal, Niger, Nigeria, Pakistan, Qatar, St. Kitts-Nevis, Senegal, Sierra Leone, Sri Lanka, Sudan, Tanzania, United Arab Emirates, Yemen, Zambia, Zimbabwe.