That seventh, flat note takes the C chord from its bright, airy sound to the slightly more wavering, tentative tone you hear when strumming a C7.

Mains Plug, UK to IEC 60320 C7 Power Cords / Electrical Power

Appliances can be used in another country easily, with a simple change of the power supply cord (including a connector and a country-specific plug).Cables with a C13 connector at one end and a type E plug connector at the other are commonly available.

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Due to the range of voltages available, different types of cable assemblies will suit varying requirements. Kettle plug" (often "jug plug" in Australian or New Zealand English) is a colloquial term used for the high-temperature C16 appliance inlet (and sometimes for C15 connector that the plug goes into). Unpolarized C7 connectors can be inserted into the polarized inlets; however, doing so might be a safety risk if the device is designed for polarized power.Instead, a country-specific power supply cord can be included in the product packaging, so that model variations are minimized and factory testing is simplified. The most common ones are "IEC connector" for the common C13 and C14, the "figure-8 connector" for C7 and C8, and "cloverleaf connector" or "Mickey Mouse connector" for the C5/C6. On “Baby Love,” the C7 chord provides that “question mark” to what feels like a one-sided relationship. They are identified by letters, not numbers, with one letter identifying the plug connector, and the alphabetical next letter identifying the mating appliance outlet. Appliance outlet: "part of the interconnection coupler which is the part integrated or incorporated in the appliance or equipment or intended to be fixed to it and from which the supply is obtained".

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High Powered Blade Server Chassis such as the HPE c7000 utilize multiple C20 inlets for power due to the high power consumption of the each blade server within. A C8B inlet type is defined by the standard for use by dual-voltage appliances; it has three pins and can hold a C7 connector in either of two positions, allowing the user to select voltage by choosing the position the connector is inserted.

These have largely been supplanted by cordless shavers with rechargeable batteries or corded shavers with an AC adapter. The IEC 60320 C8 Inlet is commonly found on standard power supplies for electronic devices that are double insulated, due to the fact there is no grounding conductor.