Method and system for detecting miswiring of a power supply for a domestic appliance

A system for detecting miswiring in an alternating-current (AC) power supply having a first hot line, a second hot line, and a neutral line, for an appliance having a light electrical load powerable between the first hot line and the neutral line, and a heavy electrical load powerable between the first and the second hot lines, the system comprising:

• a voltage sensor configured to send a voltage signal representative of a potential difference between the first hot line and the neutral line;
• a phase sensor configured to send a phase signal representative of a phase difference between the first hot line and the second hot line;
• a control module coupled to receive the voltage signal and the phase signal and identify a first fault condition indicating that the second hot line and the neutral line are reversed when the voltage signal exceeds a nominal voltage of the first hot line by a voltage threshold, and to identify a second fault condition indicating that the first hot line and the neutral line are reversed when the phase signal is within a phase threshold measured from 0 degrees;
• and
• wherein when the appliance is connected to the AC power supply, the system is configured to disconnect the heavy electrical load and the light electrical load from the AC power supply in the first fault condition;
• and to disconnect only the heavy electrical load from the AC power supply in the second fault condition.