Missing C3/C4 on IEC 60320 (IEC 320) Reference Chart – IEC 60320 Connectors & Plugs | StayOnline
Posted by jpluimers on 2025/12/29
I do like the [Wayback/Archive] IEC 60320 (IEC 320) Reference Chart – IEC 60320 Connectors & Plugs | StayOnline ¹, but it lacks combo C3/C4 plug/inlet:
C3 C4 From: IEC 60320 – Wikipedia (and yes: I had an old radio in my youth requiring this plug)
I bumped into the reference chart because I forgot the search term IEC 60320, and therefore searching my earlier blog posts on it ².
I did remember C13/C14 (normal appliance couplers) and C19/C20 (higher power device couplers), so I used the query [Wayback/Archive] c20 c19 amperage – Google Search giving me this table:
IEC-60320 (IEC320) Reference Chart
IEC-60320 Plugs and Connectors C15A/C16A 250 Volts 10 Amps 125/250 Volts 15 Amps C17/C18 250 Volts 10 Amps 125/250 Volts 15 Amps C19/C20 250 Volts 16 Amps 125/250 Volts 20 Amps C21/C22 250 Volts 16 Amps 125/250 Volts 20 Amps
That was Google’s abstract of the above reference.
I had to query [Wayback/Archive] c20 c19 wikipedia – Google Search to get at the above Wikipedia page.
¹ Links from the reference
These gave me an idea to what kind of coupler products are available.
- [Wayback/Archive] IEC 60320 C20 to C13 Black Cords
- [Wayback/Archive] C19 C20 Power Cord | StayOnline
- [Wayback/Archive] IEC 60320 C20 to C21 Black Cords
- [Wayback/Archive] NEMA 5-15 to C19 Cords
- [Wayback/Archive] IEC 60320 Female Connectors
- [Wayback/Archive] IEC 60320 C20 Block Plug Adapters
Related:
- USA: NEMA connector – Wikipedia
- Most of EU: Schuko – Wikipedia
- World: AC power plugs and sockets – Wikipedia
- World: Mains electricity by country – Wikipedia
² Related blog posts
- Some notes on apcupsd, a SUA3000XLI and a SUA48XLBP battery pack
- C13/C14 wiring diagram live/neutral/earth
- DB-9 connectors are actually named DE-9 (via D-subminiature – Wikipedia) – future scheduled blog post
--jeroen
The Wiert Corner - irregular stream of stuff 
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