A type test sample is operated at 0,9 to 1,1 times its rated voltage with its nominal load. A test chain is hung over accessible uninsulated SELV parts. The test chain shall form the shortest possible path by being loaded at each end, subject to a maximum of 250 g with a weight equal to: (15 ‘X’) g
Where ‘X’ is the distance between conductors in the unloaded state, in centimetres.
The test chain shall not melt through, nor shall any part of the type test sample reach a temperature exceeding the values of Tables 12.1 and 12.2.
- Chain of 1 m length of an uncoated metal, made of 63 % Cu/37 % Zn.
- The chain shall have a resistance value of 2,5 Ω/m ± 20 % when stretched with a load of 200 g/m.