Clearance Creepage: reinforced
Minimum electrical clearance and creepage distances per IEC 60664-1:2020 (insulation coordination for low-voltage equipment up to 1000V AC / 1500V DC) and IPC-2221B (PCB conductor spacing). Indexed by insulation type (functional, basic, supplementary, reinforced, double, ipc_pcb), pollution degree (1–3), overvoltage category (I–IV), and working voltage (V). Clearance is shortest air-path distance; creepage is shortest surface-path distance. Critical for PCB layout, enclosure design, and product safety compliance (CE, UL, CSA).
| insulation type | record id | altitude correction factor | application note | clearance mm (mm) | creepage mm (mm) | material group | overvoltage category | pollution degree | standard | working voltage V (V) |
|---|---|---|---|---|---|---|---|---|---|---|
| reinforced | reinf_pd1_ovc1_150 | 1 | Reinforced insulation; PD1; OVC I; 150V; reinforced = basic one impulse level up | 0.3 | 1.2 | any | I | 1 | IEC60664-1 | 150 |
| reinforced | reinf_pd1_ovc1_300 | 1 | Reinforced insulation; PD1; OVC I; 300V | 0.6 | 1.6 | any | I | 1 | IEC60664-1 | 300 |
| reinforced | reinf_pd1_ovc1_50 | 1 | Reinforced insulation; PD1; OVC I; = 2× basic clearance per IEC 60664-1 Table F.2 next impulse step; used for double-insulated Class II products | 0.16 | 0.8 | any | I | 1 | IEC60664-1 | 50 |
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