Load control device having a reduced leakage through ground

A method to control an electric load device, comprising:

• maintaining, by electric load control circuitry, a controllably conductive device in a non-conductive state;
• wherein the controllably conductive device reversibly transitions between a conductive state and the non-conductive state, the controllably conductive device electrically coupled between a first terminal and a second terminal
• causing, by the electric load control circuitry, a first controllable switch included in a first zero-cross detect circuit to transition to a conductive state;
• wherein the first controllable switch reversibly transitions between the conductive state and a non-conductive state, the first zero-cross detect circuit electrically coupled between the first terminal of the controllably conductive device and a ground connection;
• receiving, by the electric load control circuitry, from the first zero-cross detect circuit an input signal indicative of a presence or an absence of an AC voltage;
• and
• responsive to the receipt, from the first zero-cross detect circuit, of the input signal indicative of the presence of the AC voltage at the first zero-cross detect circuit:
• causing, by the electric load control circuitry, the first controllable switch to remain in the conductive state;
• and
• receiving, by the electric load control circuitry, an AC source voltage zero crossing input signal from the first zero-cross detect circuit
• responsive to the receipt, from the first zero-cross detect circuit, of the input signal indicative of the absence of the AC voltage at the first zero-cross detect circuit:
• causing, by the electric load control circuitry, the first controllable switch to transition to a non-conductive state;
• and
• causing, by the electric load control circuitry, a second controllable switch included in a second zero-cross detect circuit to transition to and remain in the conductive state;
• wherein the second controllable switch reversibly transitions between the conductive state and a non-conductive state, the second zero-cross detect circuit electrically coupled between the second terminal of the controllably conductive device and a ground connection;
• and
• receiving, by the electric load control circuit, the AC source voltage zero crossing input signal from the second zero-cross detect circuit.

A non-transitory, machine readable, storage device that includes instructions that, when executed by electric load control circuitry, causes the electric load control circuitry to:

• maintain a controllably conductive device in a non-conductive state;
• wherein the controllably conductive device reversibly transitions between a conductive state and the non-conductive state, the controllably conductive device electrically coupled between a first terminal and a second terminal
• cause a first controllable switch included in a first zero-cross detect circuit to transition to a conductive state;
• wherein the first controllable switch reversibly transitions between the conductive state and a non-conductive state, the first zero-cross detect circuit electrically coupled between the first terminal of the controllably conductive device and a ground connection;
• receive from the first zero-cross detect circuit an input signal indicative of a presence or an absence of an AC voltage;
• and
• responsive to the receipt, from the first zero-cross detect circuit, of the input signal indicative of the presence of the AC voltage at the first zero-cross detect circuit:
• cause the first controllable switch to remain in the conductive state;
• and
• receive an AC source voltage zero crossing input signal from the first zero-cross detect circuit
• responsive to the receipt, from the first zero-cross detect circuit, of the input signal indicative of the absence of the AC voltage at the first zero-cross detect circuit:
• cause the first controllable switch to transition to a non-conductive state;
• and
• cause a second controllable switch included in a second zero-cross detect circuit to transition to and remain in the conductive state;
• wherein the second controllable switch reversibly transitions between the conductive state and a non-conductive state, the second zero-cross detect circuit electrically coupled between the second terminal of the controllably conductive device and a ground connection;
• and
• receive the AC source voltage zero crossing input signal from the second zero-cross detect circuit.