Autodesk 235B1-05A761-1301 - AutoCAD MEP 2010 User Manual page 831

load diagram A symbolic drawing, typically a 2D plan, that shows the layout of an electrical system.
main run See also trunk.
match lines Annotation referencing another drawing that contains additional sections of a model. For
example, a plan view of a building with the east side of the building in one drawing and the west side in
another drawing would have a match line on each drawing to show where the building was split.
material The substance that a part is made of, such as plastic, metal, or steel.
model (1) A 2D or 3D representation of one or more objects.
model (2) In Content Builder the parametric shape representing all possible sizes, and defined by parameters,
geometry, dimensions, and geometric constraints.
model space One of 2 primary spaces in which objects reside. Typically, a building model is placed in a 3D
coordinate space called model space. A final layout of specific views and annotations of this model is placed
in paper space. See also paper space.
module An assembly of self-contained, interconnected components that constitutes an identifiable device,
instrument, or piece of equipment.
MvBlock For multi-view block. A type of block that can contain multiple AutoCAD blocks set to display
differently in different views.
MvPart For multi-view part. An MvPart is a multi-view block with smart connectors. They include parts
such as access doors, coils, fans, filters, and pumps. See also MvBlock.
N.D. For nominal diameter.
name A character string used to identify a part. The name is predefined for parts from the catalog and
content, such as schematic symbols, and is user-defined for custom parts you create, such as MvParts.
network A group of interconnected building system runs.
neutral wire A common type of circuit wire. The neutral wire returns power from a panel or device to the
source. The neutral wire is connected at the main service panel. See also grounded conductor.
node anchor A feature that fastens, or anchors, an object to the node position of an object. The movement
of an anchored object is constrained by the other object. See also cell anchor.
nodes (1) An object snap specification to locate points, dimension definition points, and dimension text
origins.
nodes (2) Points to which an AEC object can be attached, controlling the position and rotation of the object.
nominal size Approximate dimensions of a part for ease of identification. For example, a pipe or conduit
1
may be referred to as / inch, although the actual dimension on the drawing is 0.2495 inch. Therefore, the
4
1
nominal size is / inch.
4
north arrow A graphical symbol used to designate the north direction in space on a site plan or other plan
view drawing.
O.D. For outside diameter.
object A collection of one or more graphical elements, such as lines, circles, polylines, text, or dimensions,
treated as a single element for creation, manipulation, and modification.
object anchor See also anchor.
Object Enabler See also AEC Object Enabler.
object snaps Methods for selecting commonly needed points on an object while you create or edit AutoCAD
drawing. See also snaps.
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