Andy maybe this post from 2010?


6.3.7 Joints and terminations
6.3.7.1 Joints and terminations of cables, cores and conductors shall be
made in accordance with manufacturers' instructions or the
appropriate part of SANS 10198. Flexible cables shall only be joined
using cable couplers or manufacturers' jointing kits. All joints shall be accessible, protected against strain, and protected in accordance
with 5.1.1, except for joints made and sealed permanently and intended
to be maintenance free. Amdt 1; amdt 3; amdt 4; amdt 5

5.1.1 Live parts
It shall not be possible to touch any live part within arm's reach with the
standard test finger (see SANS 60529/IEC 60529) Amdt 5
a) during normal operation, or
b) when a cover is removed, unless the cover is removed with the use of
a tool or a key.

The way i see it, you can remove a screw cap (porcelain midget) without tools, and 6.3.7 specifically refers to 5.1.1

The joint is also not protected against strain, as it can be separated quite easily at times. (depends on what day the screw connector was made )

What really bothers me is that you do need a tool to get into the roof in the first place.....