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Guide to commercial installations | Part 2 Panelboard: Standards and Regulations
7
So, in conclusion, the relevant design current must not
exceed the
I
nA or
I
nc of the associated panelboard having
taken any applicable diversity (loading factors) into account.
Accessibility
You should ensure that equipment is located to facilitate its
operation, inspection and maintenance.
Since only skilled or instructed persons should operate a
panelboard the location of the board, or use of key locks for
its door should be considered.
If door locks are used, it helps if people can see the devices
and determine whether they have tripped, so consider using
a glazed door.