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 LANTNAVFACENGCOM A&E GUIDE
3/93
equipment such as motorized doors, civil equipment such as lift stations and
pumps, and structural equipment such as cranes. The electrical engineer
must ensure that the required information is contained on the project
drawings for miscellaneous equipment even if it must be added to the
electrical drawings.
A.5.4.4
COMMENTS
a. Specifically identify each piece of equipment (e.g., unit heater No. 1,
unit heater No. 2, etc.).
b. See Figures 13 through 15 for typical illustrations of how to properly
display equipment on the contract drawings.
MOTOR CONTROL EQUIPMENT
A.5.5
A.5.5.1
EQUIPMENT SELECTIONS
The choice between using motor control centers (MCC's), motor starter
panels, combination starters, and individual starters and disconnects must be
evaluated. Several points for consideration are:
a. Centralized control location necessary or required.
b. Quantity of motors and equipment to be controlled.
C. Sizes of motors and equipment.
d. Economic considerations (price comparisons).
A.5.5.2
SELECTION GUIDANCE
a. Individual motor starters and disconnects are preferred over
combination starters and are usually more cost effective.
b. Individual motor starters and disconnects are usually preferred and are
more economical than MCC's and motor starter panels, especially
where smaller motors and scattered loads are involved.
c. Motor starter panels would be preferred over MCC's where a
centralized control location is required, where NEMA Size 0 starters
can be used, or where a wall mounted versus floor mounted equipment
panel is desirable.
Attachment A-27
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