In Ontario this rule applies:
14-418 Disconnecting Means
(1) A single disconnecting means shall be provided either integral with or adjacent to the distribution equipment:
(a) Within each unit of a multi-unit building, other than a dwelling unit;
(b) Within each area common to more than one building, such as an underground parking area; or
(c) Within each building when fed from another building.
(2) Subrule (1) does not apply to circuits from part of fire alarm, fire protection and emergency systems.
