Hi Amund, For 62368-1, what requirements are applied depends on whether you have a cemented joint or uncemented joint. See 5.4.4.5 (including the note which has examples), 5.4.7, G.13.4 and Figures O.6, O.7, O.8, O.14 and O.15.
On Tue, Nov 12, 2024 at 1:00 PM Amund Westin <[email protected]> wrote: > Hi Rich, > > > > Great summary. > > Through-holes is the case I’m struggling with now. > > > > 1. Through-holes. > > > 1. Solid insulation between the AC plane and the through-hole > conductor: No clearance and creepage requirements. > 2. *Solid insulation between the GND plane and the through-hole > 230VACconductor: No clearance and creepage requirements. * > 3. Air insulation between the through-hole conductor and the AC > plane: The separation must meet clearance and creepage requirements. > 4. *Air insulation between the through-hole 230VAC conductor and > the GND plane: The separation must meet clearance and creepage > requirements. * > > I have added our situation and assume that doesn’t change the facts. > > > > Do I understand this correct, that all kind of *clearance and creepage > requirements are though air insulation, and not through solid pcb > insulation?* > > Where in IEC62368-1 (or IEC60950-1) will I find these paragraphs regarding > “No clearance and creepage requirements”, as in the No.1 statement?. > > > > BR > > Amund > > > > > > > > > > On 2024-11-11 21:27, Richard Nute wrote: > > > > Hi Amund: > > > > 2. Plane separation. > > > 1. No air insulation between planes: No clearance and creepage > requirements: the planes can be adjacent. > 2. Air insulation between planes: The planes must be separated by > clearance and creepage requirements. > > > 3. Edges of the PCB. > > > 1. AC plane does not extend to the edge of the PCB: No clearance and > creepage requirements. > 2. AC plane extends to the edge of the PCB: Clearance and creepage > dimensions are required. > > > 4. Through-holes. > > > 1. Solid insulation between the AC plane and the through-hole > conductor: No clearance and creepage requirements. > 2. Air insulation between the through-hole conductor and the AC > plane: The separation must meet clearance and creepage requirements. > > > 5. Solid-air series construction. > > > 1. 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]> <[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:* [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:* [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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