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IEC 60320 appliance couplers: C13 / C14, C5 / C6, C7 / C8, C15 / C16, C17 / C18, C19 / C20, C21 to C24 (pin spacing, ratings, snap-in panel numbers)

What is the pin spacing of a C13 / C14 and a C19 / C20, what do the C-numbers mean, and what panel cutout does an inlet need? · Standard part · basis: IEC 60320-1 as tabulated by Wikipedia and Interpower's coupler sheet, plus Interpower, Farnell and Schurter datasheet text for panel numbers; numbers only

Also called: iec c13 c14 dimensions, c13 c14 pin spacing, c19 vs c13, c20 inlet cutout, iec c14 inlet panel cutout, iec 60320 c5 c6 cloverleaf, c7 c8 figure 8 connector, c15 c16 hot condition, c13 vs c15, c17 c18 connector, kettle lead c15, iec 60320 coupler chart, c14 inlet hole size, iec 320 c20

Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features

sizes: 17 in table

Notes

IEC 60320-1 appliance couplers come in pairs: a connector on a cord (C13) and an inlet on the equipment (C14). The pin-spacing column is the centre-to-centre spacing between the line and neutral pins: for the earthed pairs it is given horizontal (H) and vertical (V) as Wikipedia prints it from the standard. C13 / C14 is 14 mm × 4 mm, C19 / C20 is 13 mm × 8 mm, C5 / C6 (cloverleaf) 10 mm × 4.5 mm and C7 / C8 (figure 8) 8.6 mm.
The letters A to L are the interconnection couplers (a plug connector on the equipment and an appliance outlet on the cord, the same pin layout as the C-pair beside them in the table above). Interpower's sheet pairs C5 / C6 with A, B; C7 / C8 with C, D; C13 / C14 with E, F; C17 / C18 with G, H; C19 / C20 with I, J; C23 / C24 with K, L and does not map the others. Wikipedia's table gives the same pin spacing for the pairs (A / B 10 × 4.5, C / D 8.6, E / F 14 × 4, G / H 14, I / J 13 × 8, K / L 13). M to R (high-temperature interconnection types from a 2022 amendment) are not tabulated here.
The 10 A international ratings are 15 A in North America (UL / CSA 60320-3) and the 16 A types are 20 A there; the sheet gives all couplers at 250 V AC maximum. C3 / C4 and C11 / C12 are withdrawn.
Panel cutouts: the numbers printed as text by makers. They disagree with each other (20 × 27.5 on Interpower; 28.8 or 29.6 × 19.4 on one Farnell-hosted datasheet; the panel-cutouts page has 27.5 × 19.5 and notes 27.4 × 19.4 on some drawings), so no single cutout gauge is drawn. The cutout depends on the maker and the mounting (snap-in or screw), so use the one on the datasheet of the inlet you buy. The C20 and C8 cutout numbers are in the Schurter drawings but the text read does not say which number is which.
Left out: pin width and thickness, shell outlines and the slot positions of the connectors: they are in the paid IEC 60320-1 and were not published in the sources read. No files are drawn for that reason.
The C14 inlet and C13 outlet cutouts with their screw holes are on the page panel-cutouts.

IEC 60320 appliance couplers: C13 / C14, C5 / C6, C7 / C8, C15 /… size chart

connector / inlet	max current (A)	max pin temperature (°C)	earth contact	polarised	appliance class	pin spacing, centres (mm)	interconnection pair beside it (Interpower)
C1 (connector) / C2 (inlet)	0.2	70	no	no	II	6.6	not stated
C3 (connector) / C4 (inlet)	2.5	70	no	yes	II	10	not stated
C5 (connector) / C6 (inlet)	2.5	70	yes	yes	I	10 (H), 4.5 (V)	A / B
C7 (connector) / C8 (inlet)	2.5	70	no	no	II	8.6	C / D
C9 (connector) / C10 (inlet)	6	70	no	no	II	10	not stated
C11 (connector) / C12 (inlet)	10	70	no	yes	II	10	not stated
C13 (connector) / C14 (inlet)	10	70	yes	yes	I	14 (H), 4 (V)	E / F
C15 (connector) / C16 (inlet)	10	120	yes	yes	I	14 (H), 4 (V)	not stated
C15A (connector) / C16A (inlet)	10	155	yes	yes	I	14 (H), 4 (V)	not stated
C17 (connector) / C18 (inlet)	10	70	no	yes	II	14	G / H
C19 (connector) / C20 (inlet)	16	70	yes	yes	I	13 (H), 8 (V)	I / J
C21 (connector) / C22 (inlet)	16	155	yes	yes	I	13 (H), 8 (V)	not stated
C23 (connector) / C24 (inlet)	16	70	no	yes	II	13	K / L
panel cutout: C14, C16, C18 snap-in inlet	20 × 27.5 mm	panel 1.0, 1.5, 2.0, 3.0 mm	-	-	-	-	Interpower; the same cutout for all three
panel cutout: C14 / C18 snap-in inlet (Farnell-hosted datasheet)	28.8 × 19.4 mm for 0.8 to 1.5 mm panels; 29.6 × 19.4 mm for 1.6 to 2.0 mm panels	panel 0.8 to 2.0 mm	-	-	-	-	maker not named in the text read; two bands
panel cutout: C20 snap-in inlet (Schurter 1624)	not read (the drawing's numbers are not labelled in the text)	panel 1.5, 2.0, 2.5 mm (the order code also allows 3.0)	-	-	-	-	Schurter data sheet
panel cutout: C8 snap-in inlet (Schurter 2578)	not read (cutout numbers are not labelled in the text)	panel 1.5, 2.0, 2.5, 3.0 mm; a 1.0 mm variant has its own cutout	-	-	-	-	Schurter data sheet

Mating features

Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.

feature	exact	mates with	fit	files
C13 connector pins	14 mm (H) × 4 mm (V) centres, 10 A (15 A NA), 70 °C	C14 inlet (same spacing)	designed	all
C19 connector pins	13 mm (H) × 8 mm (V) centres, 16 A (20 A NA), 70 °C	C20 inlet	designed	all
C5 connector pins	10 mm (H) × 4.5 mm (V) centres, 2.5 A	C6 inlet (cloverleaf)	designed	all
C7 connector pins	8.6 mm centres, 2.5 A, unearthed	C8 inlet (figure 8)	designed	all
C15 connector pins	14 mm (H) × 4 mm (V) centres, 120 °C	C16 inlet	designed	all
C17 connector pins	14 mm centres, 10 A, unearthed	C18 inlet	designed	all

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Interpower	IEC 60320 coupler sheet: C-numbers, standard sheet pairs (A to L), current families	web	Publisher's page; dimensions are facts
Wikipedia	IEC 60320: appliance and interconnection coupler tables (max current, pin temperature, earth, polarised, class, pin spacing)	web	Publisher's page; dimensions are facts
Interpower	IEC 60320 C14, C16 and C18 snap-in inlets: panel cutout 20 x 27.5 mm, panel thickness 1.0 / 1.5 / 2.0 / 3.0 mm	web	Publisher's page; dimensions are facts
Farnell (datasheet 2612262)	IEC appliance inlet C14 / C18: panel cutout table by panel thickness (maker not named in the text read)	web	Publisher's page; dimensions are facts
Schurter	Type 1624: appliance inlet C20 acc. to IEC 60320-1, snap-in panel thickness 1.5 / 2 / 2.5 mm (datasheet and drawing)	web	Maker data sheet; numbers only
Schurter (enika.cz copy)	Type 2578: appliance inlet C8 acc. to IEC 60320-1, snap-in panel thickness 1.5 / 2 / 2.5 / 3 mm, 1.0 mm variant	web	Maker data sheet copy; numbers only
Schurter (product catalogue)	Type 1624 C20 inlet: datasheet page of the maker's catalogue (the maker's own drawing is here)	web	Maker catalogue; numbers only

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Plain text: sheet.txt · JSON: /api/geometry?object=iec-60320-appliance-couplers-c13-c14-c19-c20

Schematic, not to scale.