Schedule 1 Authorised Manufacturers' and authorised repairers' tests and testing methods for alternating current watthour meters Northern Ireland 1Pre-heating 2Non-registration test 3Accuracy tests 4Methods of accuracy test 5Conditions for all testing 1Test loads 7Multi-register meters 8Ployphase meters 9Margins of Error 10Insulation property test ← Signature Schedule 1 Paragraph 1 →