What safety issues should be paid attention to when using LED street lights

Electrical safety is a core element in the design and application of LED street lights. As an electronic device, the complex electrical system of the power line, signal line and control line inside the LED street light, if there are design defects, aging, damage or poor connection, it is very easy to cause short circuit or overload, resulting in serious safety accidents such as fire. Therefore, in the purchase and installation process of LED street lights, the quality of the power supply must be strictly controlled. The power supply should pass relevant certifications such as 3C, CE, UL, etc. to ensure that it can operate safely and stably in high temperature environments. At the same time, when choosing cables, brands that have passed 3C certification should be given priority. Copper wire is especially recommended because it has better conductivity and stability than inferior aluminum-clad copper wire.

When installing LED street lights, it is crucial to follow strict safety regulations. The power supply should be installed inside the street light and fixed, and must not be exposed to sunlight in an external way to avoid aging and damage of the power supply due to factors such as high temperature and ultraviolet rays, thereby causing safety hazards. The protection level of the power supply must reach IP67 and be potted to effectively prevent power failure caused by moisture or salt spray. In addition, the connection between the power supply and the accessible metal parts of the street lamp must be good to ensure the reliability of the electrical connection. The insulation voltage and insulation resistance of the power supply must also comply with relevant standards. For example, the insulation voltage requirement for input to output is 3.75kV AC/10mA, the insulation voltage for input to safety ground is 1.5kV AC/10mA, and the insulation resistance of input to output and output to safety ground must reach ≥10MΩ/500V DC/90% RH.

In terms of wiring, there are also many safety precautions for the power connection line of LED street lights. The power connection line at the input end should be a soft cable with a wire diameter of 1mm2, usually a 3×1mm soft cable; and the power connection line at the output end should also be a soft cable with a wire diameter of 0.75mm2, usually a 2×0.75mm soft cable. The input line should use a soft cable or soft wire, and be equipped with a soft wire fixing frame to clamp the soft cable or soft wire to prevent the line from loosening or being damaged due to external force. The wire ends of the input lines can be tinned or coppered, or insulated terminals can be installed (placed in the street light power box). The internal wiring should be protected by yellow wax tubes. If the wires need to be connected, wire connectors should be used as much as possible. All wires should be fixed with nylon cable ties to ensure that the lines are neat and firm.

In addition to electrical safety and installation specifications, the physical structure safety of LED street lights cannot be ignored. LED street lights are usually composed of multiple modules. If these modules are not installed firmly or are subjected to external forces, they may fall off or fall over, posing a potential threat to pedestrians and vehicles passing by. Therefore, during the installation process, it is necessary to ensure that the mechanical loading of the lamp meets the standards. For example, the mechanical loading should reach 4 times the weight, and the suspension system should not be deformed under a constant load for 1 hour. In addition, a 60N tensile force and a 0.25N·m torque test are required to ensure the stability of the lamp under various environmental conditions.