First of all, class 2 power supply is a safety standard for US market. The UL power supply 5 A should meet the output current to 5A and 100w. Class 2 LED drivers 100w that are listed or part of a listed system comply with UL 1310 Standard for Safety for Class 2 Power Units which requires the output voltage to pose no risk of fire or electric shock which makes secondary circuit protection unnecessary.
When it comes to voltage limits of CLASS 2 power supplies that can be contacted with live parts:
UL1310 standard led power supply stipulates that the output end of CLASS 2 power supply equipment should provide output cords, wiring terminals, insulated leads or output wiring terminals.
After the protective cover of the power supply, the partition or the protective gear that can be disassembled without tools are taken away, according to different test needles (Picture 1), articulation detector (Picture 2) or touch detector (Picture 3) The degree of contact with live parts has different requirements for the maximum voltage at the output. Before the test, it is necessary to confirm that the non-insulated live parts must be fixed on the surface of the substrate or accessories. The minimum acceptable distance cannot be reduced due to rotation or displacement.
At the same time, the live parts that pose a risk of electric shock must be enclosed or placed to reduce Access to dangerous places.
