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Key Points for Selecting Wire Diameter for SPD Surge Protective Devices
Aug 13 , 2026
Why Wire Diameter Matters? When a surge occurs, the connecting conductors serve as the path for discharging lightning current into the ground. Insufficient conductor gauge can lead to wire burnout, SPD failure, or even fire; conversely, a properly sized conductor ensures that surge current is rapidly and safely diverted to the ground. Conductor sizing is subject to specific requirements under nati...
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