I would say NO.  On some models the lower right quadrant it will have a screw and the iso is behind it.  Eitherway a 2 pole isolator would be better as a test point and more importantly it gives a place that you can Lock Off for safe working. 

That photo is a bit fuzzy in the key area - I can read the bar code but not the text to the right of it, but  if you can tell us what I hope is the meter model no. in the text above the centre seal wire, we can look it up and probably be pretty certain.

(The white screwslot in the body above the RH terminal cover looks interesting - and I hope identifies as one of these LG 5258 series 

If so, and only if so,  L+G consider it to be an "isolation switch")

Mike.

Hello Mike,

Well done... always on the ball. I'll see if I can get that model No! 

Thanks, Tom

Hello, Sergio,

Thanks for your reply and, I agree!! 

Regards... Tom

Hello, been out, all day, and just come back to see if I can make out the text, above the central seal... I cannot make out what it is, either! 

Anyways, thanks for replying... good luck!

regards... Tom