I have posted a piece here which is also on the TT topic, but is more general and I think a new thread would be better. Your voice is heard. See below.
Of course all sizes of fuses are safe. It is the backup ability which is important for CUs, see the specification of the CU. The requirements for other switchgear are different, in breaking capacity and protection.
Of course all sizes of fuses are safe. It is the backup ability which is important for CUs, see the specification of the CU. The requirements for other switchgear are different, in breaking capacity and protection.