Why are there different sections on an EICR for isolators, switching off for mechanical maintenance and emergency switching?

Because they're different functions, often need different equipment and are needed in differing situations (you normally don't need an E-stop for a shower). Though I'd admit that the difference between isolation and switching off for mechanical maintenance is very small these days - I wonder how many have noticed that a normal lightswitch is no longer acceptable for changing a lamp?

   - Andy.

Why are there different sections on an EICR for isolators, switching off for mechanical maintenance and emergency switching?

Because they're different functions, often need different equipment and are needed in differing situations (you normally don't need an E-stop for a shower). Though I'd admit that the difference between isolation and switching off for mechanical maintenance is very small these days - I wonder how many have noticed that a normal lightswitch is no longer acceptable for changing a lamp?

   - Andy.

AJJewsbury said:

I wonder how many have noticed that a normal lightswitch is no longer acceptable for changing a lamp?

You mean that you check? ;-)

I am only being slightly tongue in cheek - it is difficult to know with a pull-cord or even multi-way wall switches.

it is difficult to know with a pull-cord or even multi-way wall switches

It's a (theoretical) problem even with simple 1-way plateswitch installed the right way up. The issue is that BS 7671 now demands proper isolation for mechanical maintenance (which re-lamping is still included in) - and according to table 537.4 ordinary lightswitches (to BS EN 60669-1) don't provide isolation.

   - Andy.

Yes, but see note 4.