On Nov 17, 9:13*pm, John Rumm wrote:
js.b1 wrote:
If you have an earth rod, that requires a specialised tester - which
it is useful to have (although cheaper to put a shed on wooden
sleepers and not use Class-1 tools outside :-)

A standard EL tester will do most earth rods ok - although it does not
test the effect of long duration high current leakages. Having said
that, the system RCDs ought to prevents those from occurring.

Indeed, I was checking around earlier tonight and it appears that
most sparks are just using bog standard EFLI for TT domestic.
Better to whack in another 4ft and use decent Furse etc.

In some ways you could argue that TT is safer with class I tools
outside, since there is little chance of the earth taking on a
potential significantly different from that of the local ground.

That is the point - although there are not many class-1 tools.
Still surprised they do not do 110V hedge trimmers, petrol is
not ideal (ok electric is as noisy) and cordless too wimpy.