Q: Can I have multiple earthed neutrals (MENs) in sheds and outbuildings?
A: Yes - please read the notes in conjunction with the scenario depicted in the diagram below
This installation incorporates
At the main switchboard and distribution boards 1 and 2,
There is no MEN connection at distribution board 3, as the earthing is connected directly to the installation earthing system, this is known as a running earth in the sub-main.
The method of earthing a distribution board in an outbuilding must comply with either the system described in b or in c, (as per the diagram).
The neutral conductor supplying distribution board 2 does not rely on a terminal at distribution board in outbuilding 1 for its continuity.
Wiring Rule clauses (specific to this diagram)