Hello, isolator switch help

[westward10]

Apologies it is not ver clear. I carried out continuity testing at the isolater switch and extractor fan. When turned on it was fine. When the isolater was turned off it gave a reading. At all other parts of the circuit, when the power was off I got a reading greater than 19.99M Ohms as expected. After the isolater it dropped to less than 1M ohm.
Surely this reading should be higher?

Continuity testing is carried out at the ohms scale not Mohm. Are you doing insulation resistance testing. As for the neutral wires having blue tape on them indicating switch live did you not test them to verify.

 

[Wilko]

Hi - is the new fan still connected during the IR tests?