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Larger equipment such as fridges can have longer leads, and in some cases a longer earth path as part of their construction, and a PAT tester can initially indicate a fail when carrying out the earth continuity test if it's over 0.2Ω. The test engineer should calculate the expected value using 0.1+R calculation, where R is the resistive value of the cable, depending on it's length and cross-section. IET code of practice has a table of these values.

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