Hello,
I'm looking for an outside opinion on the "Final circuit" definition.
As per BS 7671, a final circuit is: A circuit connected directly to current-using equipment, or to a socket-outlet or socket-outlets or other
outlet points for the connection of such equipment.
Can the circuit between a distribution cabinet (say 1FC1 MCB) and a control cabinet (1FC1 MCB - 1TA1 AC/DC PSU) be considered a final circuit, or is it just a distribution circuit?
This tends to come up when selecting the appropriate Zs expected for this circuit, on whether it is a final circuit and thus 0.4s disconnection time must be selected, or a distribution circuit and then 5s is the required disconnection time.
Thank you,
Adrian
