Techniques for determining a potential electrical threat by a utility meter are described herein. A metrology unit of the meter is configured to receive electrical data associated with electrical usage at a location The meter is configured to determine, based on the electrical usage at the location and/or previous electrical data, abnormalities indicative of an unstable connection, such as a loose wire connecting a load to a power supply. The meter may employ a machine learned model or other algorithm to identify the loose wire or unstable connection and is configured to disconnect power to the location and/or send a message to an alarm device at the location and/or to a computing device remote from the location. In this way, the metrology unit can be used to mitigate potential electrical threats, such as fire, due to an unstable connection such as a loose connection.

Techniques for determining a potential electrical threat by a utility meter are described herein. A metrology unit of the meter is configured to receive electrical data associated with electrical usage at a location The meter is configured to determine, based on the electrical usage at the location and/or previous electrical data, abnormalities indicative of an unstable connection, such as a loose wire connecting a load to a power supply. The meter may employ a machine learned model or other algorithm to identify the loose wire or unstable connection and is configured to disconnect power to the location and/or send a message to an alarm device at the location and/or to a computing device remote from the location. In this way, the metrology unit can be used to mitigate potential electrical threats, such as fire, due to an unstable connection such as a loose connection.

The present disclosure provides a method and system for ground fault detection. The method may include obtaining an input voltage and a null-ground voltage; determining whether the null-ground voltage is less than a voltage threshold; if yes, further determining whether the null-ground voltage is less than a preset voltage; if yes, determining that the grounding state is normal; if the null-ground voltage is greater than or equal to the preset voltage, determining that the grounding state is abnormal; if the null-ground voltage is greater than or equal to the voltage threshold, determining that the live wire and the null wire are reversed; in the case that the live wire and the null wire are reversed, determining whether the difference between the input voltage and the null-ground voltage is less than the preset voltage; if yes, determining that the grounding state is normal; if no, determining that the grounding state is abnormal.

Tools and techniques are described to automate commissioning of physical spaces. Controllers have access to databases of the devices that are controlled by them, including wiring diagrams and protocols, such that the controller can automatically check that each wire responds correctly to stimulus from the controller. Controllers also have access to databases of the physical space such that they can check that sensors in the space record the correct information for device activity, and sensors can cross-check each other for consistency. Once a physical space is commissioned, incentives can be sought based on commissioning results.

Tools and techniques are described to automate commissioning of physical spaces. Controllers have access to databases of the devices that are controlled by them, including wiring diagrams and protocols, such that the controller can automatically check that each wire responds correctly to stimulus from the controller. Controllers also have access to databases of the physical space such that they can check that sensors in the space record the correct information for device activity, and sensors can cross-check each other for consistency. Once a physical space is commissioned, incentives can be sought based on commissioning results.

Tools and techniques are described to automate line testing when wiring devices (such as equipment and sensors) to controllers. Controllers have access to databases of the devices that are controlled by them, including wiring diagrams and protocols, such that the controller can automatically check that each wire responds correctly to stimulus from the controller. After testing, a reporting device rapidly shows the results of the line testing.

Tools and techniques are described to automate line testing when wiring devices (such as equipment and sensors) to controllers. Controllers have access to databases of the devices that are controlled by them, including wiring diagrams and protocols, such that the controller can automatically check that each wire responds correctly to stimulus from the controller. After testing, a reporting device rapidly shows the results of the line testing.

A load control device for controlling an amount of power delivered from an alternating-current (AC) power source to an electrical load may be configured to determine if a miswire condition exists at the load control device. For example, a control circuit of the load control device may be configured to detect a hot-to-dimmed-hot miswire condition in which a dimmed-hot terminal may be coupled to a hot side of the AC power source and a hot terminal may be coupled to the electrical load. In addition, the control circuit may be configured to detect a neutral-to-accessory-terminal miswire condition in which the hot terminal may be coupled to the hot side of the AC power source and an accessory terminal may be coupled to a neutral side of the AC power source. The control circuit may maintain a controllably conductive device non-conductive in response to determining that one of the miswire condition exists.

A load control device for controlling an amount of power delivered from an alternating-current (AC) power source to an electrical load may be configured to determine if a miswire condition exists at the load control device. For example, a control circuit of the load control device may be configured to detect a hot-to-dimmed-hot miswire condition in which a dimmed-hot terminal may be coupled to a hot side of the AC power source and a hot terminal may be coupled to the electrical load. In addition, the control circuit may be configured to detect a neutral-to-accessory-terminal miswire condition in which the hot terminal may be coupled to the hot side of the AC power source and an accessory terminal may be coupled to a neutral side of the AC power source. The control circuit may maintain a controllably conductive device non-conductive in response to determining that one of the miswire condition exists.

Methods and systems for detecting a neutral voltage connection, involve determining when a value of a neutral current is equal to zero, wherein the neutral current comprises a difference between a current flowing through two legs of an electrical meter to an end customer, wherein each of the two legs comprises a first voltage with respect to a ground and a second voltage with respect to one another; and verifying that the neutral current has been detected to zero, in response to determining that the value of the neutral current is equal to zero.