The IPC 2221 voltage and spacing standards have two general voltage levels for creepage and clearance, which it defines as “Low Voltage” and “High Voltage”, Some of the “High Voltage” would be considered SELV (Safety Extra Low Voltage), the IPC 2221 Low Voltage is <15 V DC or AC RMS, […]
IPC-2221
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Using IPC 2221 to work out creepage and clearance track widths for use in KiCad for both Low and High Voltages.