An example of 'unexpected may be if the same style of switch board or link box was used for two wildly dissimilar voltages where different safety regimes may operate - say identical boxes but one at 690V 3 phase (not to be left open with the power on) the other with telcoms or alarm wiring at 48 or 24VDC (where maybe you would be more or less worried about access! ).
On well managed estates the house style tends to trump the minimum requirement, and all boards of a certain type carry some sort of label, if there is scope for confusion or not.
(" 3 phase panel no 6, warehouse lighting" that sort of thing, or a cryptic code that tells those in the know where to isolate it. )
An example of 'unexpected may be if the same style of switch board or link box was used for two wildly dissimilar voltages where different safety regimes may operate - say identical boxes but one at 690V 3 phase (not to be left open with the power on) the other with telcoms or alarm wiring at 48 or 24VDC (where maybe you would be more or less worried about access! ).
On well managed estates the house style tends to trump the minimum requirement, and all boards of a certain type carry some sort of label, if there is scope for confusion or not.
(" 3 phase panel no 6, warehouse lighting" that sort of thing, or a cryptic code that tells those in the know where to isolate it. )
