Hi Amund:
1. Plane separation. a. No air insulation between planes: No clearance and creepage requirements: the planes can be adjacent. b. Air insulation between planes: The planes must be separated by clearance and creepage requirements. 2. Edges of the PCB. a. AC plane does not extend to the edge of the PCB: No clearance and creepage requirements. b. AC plane extends to the edge of the PCB: Clearance and creepage dimensions are required. 3. Through-holes. a. Solid insulation between the AC plane and the through-hole conductor: No clearance and creepage requirements. b. Air insulation between the through-hole conductor and the AC plane: The separation must meet clearance and creepage requirements. 4. Solid-air series construction. a. Such construction constitutes a capacitive voltage divider. Most of the voltage is across the air insulation. However, the solid insulation most likely has more than adequate electric strength. The air can be ignored. Best regards, Rich From: Amund Westin <[email protected]> Sent: Monday, November 11, 2024 4:38 AM To: [email protected] Subject: [PSES] SV: [PSES] SV: [PSES] Creepage Live-Ground In other words, is it allowed to have GND and LIVE in adjacent PCB layers? BR Amund Fra: Amund Westin Sendt: 11. november 2024 10:25 Til: <mailto:[email protected]> [email protected] Emne: [PSES] SV: [PSES] Creepage Live-Ground Ref. picture below . would the clearance be different in a case if we had a solid ground plane and solid LIVE AC plane on a PCB? Let's say the planes were layer 2 and 3 in a 4-layer PCB. There must be some connection point to both layers, which could look like the picture below, but let's say the there is a connection area on the PCB where the GND and LIVE are >> 20mm from each other. But the two layers are maybe 0.5mm from each other. BR Amund Fra: Amund Westin Sendt: 5. november 2024 14:51 Til: <mailto:[email protected]> [email protected] Emne: [PSES] Creepage Live-Ground Pin with 230VAC through the FR4 PCB with spacing to the inner ground plane. Creepage: Which table in the EN 62368-1:2020 apply? BR Amund _____ This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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