Mains n. : The farm attached to a mansion house.

Example:
How do you deactivate a Mains connected smoke alarm?

Taxonomy
voltage, volts, frequency, equipment, household, power, tolerance, conductors, appliances, lamps, wires, Mains electricity, mains, mains power, power supply, ground faults, free encyclopedia, socket.

Defination from the web:
mains power is referred to by a variety of formal and informal names, including household power, household electricity, domestic power, ... Worldwide, many different mains power systems are found for the operation of household and light commercial electrical appliances and lighting. ...