A SafeBloc is an accessory device, which can be used with other test equipment, as an adapter, to connect and test power cords and wiring harnesses for production testing purposes, prior to installation into equipment. Such testing would include Hipot and continuity testing of the power cord or wiring harness. The SafeBloc allows the bare wires of a power cord or wiring harness to be connected to the test equipment via clips inside the enclosure. Power can only flow through the device once it is closed and the test sequence is then started, ensuring that the test operator will not get shocked during the testing procedure. Power cord manufacturers and CEMs manufacturing custom wiring harnesses would be typical users of such a device.