I need an additional circuit, but the CU is full. Is it permissible to
move a circuit to a new CU and use the freed-up fuse to feed the new
CU?
(Yes I know I need about Part P)

In article .com,
says...
I need an additional circuit, but the CU is full. Is it permissible to
move a circuit to a new CU and use the freed-up fuse to feed the new
CU?
(Yes I know I need about Part P)



Would be a better option in most cases to split the supply via a Henley
block to feed both CUs directly, or replace the existing CU with a
larger one if space permits.

Just my off-the-cuff opinion!

In article ,
Gary Cavie writes:
In article .com,
says...
I need an additional circuit, but the CU is full. Is it permissible to
move a circuit to a new CU and use the freed-up fuse to feed the new
CU?
(Yes I know I need about Part P)

Would be a better option in most cases to split the supply via a Henley
block to feed both CUs directly, or replace the existing CU with a
larger one if space permits.

Just my off-the-cuff opinion!

This is better, but the OP's suggestion is also allowed.
Would suggest using a BS1361 cartridge fuse on the way which
feeds the second CU, as it will offer better discrimination
than daisy-chaining MCB's, where you'll likely find they both
trip on short circuit faults.

--
Andrew Gabriel