Dave Plowman (News) wrote:

better than a simple volt meter. But the correct tester will draw a very
high current for an instant thus checking the earth is doing its job
correctly - ie capable of drawing enough current in event of a fault to
trip the circuit protector within the design time.

Which raises an interesting point; many modern loop testers have a "no
trip" test facility that enables measurements to be made without
tripping any RCD on the circuit. With the increasing use of RCDs this
will become the typical way a test like this is done.

How many of them I wonder are still able to do a high current test
without tripping the RCD?



--
Cheers,

John.

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