Metering apparatus for load centers

An apparatus comprising:

• a housing configured to be mounted at a breaker position of a load center;
• at least one connector supported by the housing and configured to be electrically coupled to a bus bar of the load center;
• a control circuit in the housing, electrically coupled to the at least one connector and configured to perform at least one electrical measurement;
• and
• an interface device supported by the housing, operatively coupled to the control circuit and configured to communicate the at least one electrical measurement to a user.

An apparatus comprising:

• a housing configured to be mounted at a breaker position of a load center;
• at least one electrical connector supported by the housing and configured to be electrically coupled to bus bar of the load center;
• an alphanumeric display disposed at a face of the housing;
• and
• a control circuit in the housing, electrically coupled to the at least one electrical connector and configured to perform at least one electrical metering operation and to display a result of the at least one electrical metering operation on the alphanumeric display.