UK Continuity Between Line and Earth

[Jakedaniel]

Just tested the end to end resistance on a ring main at a socket outlet. Readings are spot on however when changing the crocodile clips I notice that I have around 600ohms of resistance between the Line and Earth conductors. The system is TT. What could be the cause of this?

 

[Rockingit]

Have a think about what you just typed....

 

[Wilko]

Hi - the answer depends on the details of how the measurement was done, but a diagram of TT might help .

 

[Lucien Nunes]

When set up for testing ring continuity, the earthing scheme in use shouldn't make any difference to the resistance reading L-E as both line and neutral should be disconnected from the rest of the installation.

OP: To slightly extend Rockingit's question, what would happen if there were in fact a 600Ω resistance L-E and the system were energised? What leakage current would flow? How much power would be dissipated?