An electrical receptacle includes a detent for holding a terminal clamp in an open position. A terminal assembly having a terminal clamp, a terminal plate, and a terminal fastener. The terminal fastener can move the terminal clamp toward the terminal plate. The terminal clamp includes a tab that fits in a tab pocket formed in a middle housing of the receptacle. The tab pocket includes a detent for retaining the tab adjacent to a first end of the tab pocket. With the tab in this position, the terminal assembly is in the open configuration so that a space is formed between the terminal clamp and the terminal plate. In the open configuration an electrical wire can be disposed between the clamp and plate. To clamp the wire, the fastener is rotated to move the clamp toward the plate, and the detent releases the tab under application of force.