360
Electrical Distribution: Design Criteria
The main distribution in the service zone will be made with wireways.
Their increase in cost over conduit is far outweighed by the ease of
addition or deletion of wires in future changes. All connections from the
wireways to junction boxes or fittings will be made by conduit.
363.4
SERVICE MODULE REQUIREMENTS
A service module of less than 15,000 square feet would not allow the most
economic use of electrical components. Using standard sized and rated
electrical equipment which is easily obtainable off-the-shelf is a key
requirement.
Branch circuit panels, using two section panels with 225 amp busing, and
75 KVA transformers could easily handle up to 20,000 square feet,
especially where the demand load is divided between normal and
essential networks. Thus a 75 KVA transformer could handle two 10,000-
square-foot service modules at the 4.4 watts per square foot required for
the 120Y208 volt service. Additional panels and transformers could be
added within the service bay as required.
363.5
FUNCTIONAL ZONE
In general, electrical distribution into the functional zone will be surface
mounted on partitions, either housed in separate prefabricated
components or in furred out extensions of the partitions. (See Sections
332.2 and 780.)
There are many approaches to prefabricated components. They basically
represent an attempt to rationalize the diversity of location and type of
service outlet required, especially where frequent change is expected.
The more elaborate forms, such as patient room consoles or service walls,
are often difficult to use effectively because of the haphazard way services
are usually designed and installed in current hospitals. The organized and
preplanned approach of the Prototype Design should improve this
situation. Early assessment of potential demands, even without detailed
specification of outlets, should allow for more reasonable and systematic
development of such appliances.
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