The US NEMA socket system is used in following countries

• Antigua
• Aruba
• Bahamas
• Barbados
• Belize
• Bermuda
• Brazil
• Caiman Island
• Canada
• Costa Rica
• Dominican republic
• Ecador
• El Salvador
• Guam
• Guatemala
• Haiti
• Honduras
• Jamaica
• Mexico
• Montserrat
• Nicaragua
• Panama
• Philippines
• Puerto Rico
• Saudi Arabia
• Taiwan
• Thailand
• Trinidad and Tobago
• USA
• Venezuela
• Vietnam

Switches and systems