Patent ID: 8547084

Claim:
A voltage reference selector for use in conjunction with a multi-meter in taking electrical measurements from an electrical control panel, the voltage reference selector comprising: a housing; a switch carried by the housing and having a first switch input, a second switch input, a third switch input and a first switch output; a first voltage reference input carried by the housing and in electrical communication with the first switch input, the first voltage reference input configured to receive a first voltage reference cable electrically coupled to an AC voltage reference from an electrical control panel; a second voltage reference input carried by the housing and in electrical communication with the second switch input, the second voltage reference input configured to receive a second voltage reference cable electrically coupled to a ground voltage reference from the electrical control panel; a third voltage reference input carried by the housing and in electrical communication with the third switch input, the third voltage reference input configured to receive a third voltage reference cable electrically coupled to a DC voltage reference from the electrical control panel; and a first output carried by the housing and in electrical communication with the first switch output, the first output configured to receive a first multi-meter cable electrically coupled to a voltage reference input of a multi-meter; the switch operable to selectively electrically connect inputs to the first, second and third switch inputs respectively from the first, second and third voltage reference cables to the first switch output for electrical connection to the multi-meter.