Electricians, simply plug your Insulation and Continuity tester (digital or analogue) into the Calibration Checkbox to test for continuity readings (0.5 to 10 ohms) and insulation resistance (0.5 to to 50 Mohms).

This Calibration Check Box enables electricians to meet the requirements for Part P and BS 7671 for certification purposes and for those registered on the Domestic Installer Scheme to meet their requirements. The NICEIC state in their handbook that it is a necessity to maintain records of the measurements characteristics and consistency of continuity and insulation resistance test instruments against a proprietary resistance checkbox. This Calibration Check Box CCB1 will help you to do two tests on site (insulation test  and continuity test ) in order to meet the Part P regulations; the other earth loop impedance and RCD tests are allowed to be done back in your company offices using a known wall socket.  The CCB1 Calibration Checkbox is an essential tool for all electricians, its not big so can easily fit in an electricians tool kit.

This means that the CCB1 calibration checkbox complies with the requirements to regularly check the accuracy of your test instruments at regular intervals.

This Calibration Checkbox is manufactured with high specification resistors that will not be damaged by a 1000V DC insulation test