Test chain is designed according to GB7000.1 and IEC60598-1 clause 4.26.3 & figure 29 . It is mainly applied to provided a prevent the impairing of safety due to unintended short-circuiting of uninsulated accessible SELV part of opposite polarity. The test chain is made by copper zinc alloy (Cu: 30%, Zn: 37%), the chain shall have a resistance value of 2.5Ω/m±20% when stretched with a load of 200g/m.
1) Made of 63%Cu/37%Zn.
2) Resistance value: 2.5Ω/m±20%
3) Length: 1m
4) Diameter: φ2mm