Paragraph 1.3
The location of the emergency source of electrical power and
associated transforming equipment, if any, and the main switchboard
shall be such as to ensure that a fire or other casualty in spaces
containing the main source of electrical power, associated transforming
equipment, if any, and the main switchboard or in any machinery space
of category A will not interfere with the supply, control and distribution
of emergency electrical power. As far as practicable, the space containing
the emergency source of electrical power, associated transforming
equipment, if any, the transitional source of emergency power and
the emergency switchboard shall not be contiguous to the boundaries
of machinery spaces of category A or those spaces containing the main
source of electrical power, associated transforming equipment, if
any, or the main switchboard.