LIM N/V FI codes?

[buzzlightyear]

Because you can't see it, so N/V.

Really .not just another dollar in there bank account

The book is a Guide, very help full if you don't understand how thing work.

 

[Cables]

Regardless of whether you can gain access to certain parts of the circuit is irrelevant, if the ocpd is rated more than the conductor size then its a c2 .either one is an unsatisfactory report , as in further investigation .a locked room could be a commercial kitchen pantry .lots of current flowing thru 2 legs of a radial 2.5 mm circuit protected by say a c32amp mcb

Although I agree, an OCPD should not be rated higher than the conductor size, it may not warrant a C2.
Let’s say a 3amp switched fuse at a boiler 2.5mm, 32amp OCPD, single circuit.
Overload would not be possible on the cable so would not warrant a C2.
Or a 1.5mm spur of a ring circuit, same scenario.

Certainly not what you would do, but acceptable should it be found.

 

[Tom256]

In your given example of a 1.5mm spur off a ring circuit. This is not ok unless via a fused spur as overload is indeed possible.

Overload protection is required (Shall requirement) at the point a reduction of the current carrying capacity of conductors occurs EXCEPT where 433.2.2 applies.

Although I agree, an OCPD should not be rated higher than the conductor size

There are still checks and balances at play. The calculation for cable size where overload protection is not required is based on Ib (design current) and would be considered accordingly. In these circumstances the cable rating [as installed] must exceed the load yet may not neccessarily exceed the rating of the overcurrent device. It could therefore be higher and 'should not' is not relevant. This would need to be determined as part of the calculations associated with the inspection should there be reason for concern.
As a part of this the adiabatic check within regulation 434.5.2 is applied as it would be for the cpc

 

[Cables]

In your given example of a 1.5mm spur off a ring circuit. This is not ok unless via a fused spur as overload is indeed possible.

By my use of words “Same Scenario” meant, a 1.5 spur from a 32amp circuit (ring) via a switched fuse, maybe should have made that clearer.