Emergency Light Test Switch.

Indeed you can record the deviation provided you have assessed that it is no less safe than a compliant installation.


Use of switching of a circuit breaker on-load (light or heavy) would hinge on if you think a monthly operation counts as 'infrequent', and if this is in accordance with the manufacturers instructions as to the duty cycle of the device - which is what I was getting at.


537.3.1.1 mandates selection of devices for functional switching (so we're back in that loop....) in accordance with table 537.4 and other regulations also refer to it, so although it is headed 'guidance' it's perhaps a bit more than that 


Is using a FCU unsafe? - almost certainly not.  Is it fully compliant with the regs? - not in my view.  Are you likely to get pulled up on it? - probably not unless someone picky is involved (I come across too many of those...).  Might it confuse someone else who comes along later? - probably.

Indeed you can record the deviation provided you have assessed that it is no less safe than a compliant installation.


Use of switching of a circuit breaker on-load (light or heavy) would hinge on if you think a monthly operation counts as 'infrequent', and if this is in accordance with the manufacturers instructions as to the duty cycle of the device - which is what I was getting at.


537.3.1.1 mandates selection of devices for functional switching (so we're back in that loop....) in accordance with table 537.4 and other regulations also refer to it, so although it is headed 'guidance' it's perhaps a bit more than that 


Is using a FCU unsafe? - almost certainly not.  Is it fully compliant with the regs? - not in my view.  Are you likely to get pulled up on it? - probably not unless someone picky is involved (I come across too many of those...).  Might it confuse someone else who comes along later? - probably.