The Kewtech range of 17th Edition certification books are fully up to date and comply to BS7671 amendment 3. The family tree is split into two streams, new installations and existing installations. The testing results schedules are common to both streams.

TC5 is the Schedule of Test Results for up to 12 ways. It is used with the Electrical Installation Certificate (New Installations) TC1 & TC8. And with the Electrical Installation Condition Reports (existing installations) TC3 & TC4. All pages are duplicated.
For incoming supplies up to 100 A use TC1 plus the results pages either TC5 or TC6
For incoming supplies over 100 A use TC8 plus the results pages either TC5 or TC6