360
Electrical Distribution: Organization
362.1.2
Channels
The electrical and communications mains will be horizontally distributed in
a channel located on the same side of the service zone as the service bay
electrical room. Similarly to the plumbing subsystem, in areas of heavy
demand such as nursing units or radiology, a supplementary supply main
should be run down the opposite side of the module.
The space reserved for electrical main distribution and branches will be
based on the maximum load capacity potential of the service module.
362.2
SERVICE BAY
The service bay will contain the electrical room with all equipment for
electrical distribution and communications for the service module. This will
include all the transformers and the branch panel boards for the 208Y120
volt circuits. The branch circuit runs from these panel boards will not be
the most economic, but positioning the panels centrally either in the
functional zone or in the service zone would lead either to obstructions
during plan changes in the first case, or to a lack of direct access in the
latter, and also unnecessarily complicate the problem of industrial safety in
the service zone.
The only exception to the centralizing of equipment in the service bay will
be the isolation transformers and panel boards for the ungrounded circuits
for surgery and ICU areas. They might be located in the functional zone
and their location would only change as surgical suite layouts varied.
Other transformers are associated with the various networks but are
generally provided with the equipment requiring that particular modified
supply, for example the voltage transformers for radiology equipment.
The 480Y277 volt distribution will be transformed down to 208Y120 volts
at the service bay.
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