Prints and Drawings Flashcards
What is the purpose of prints and drawings?
To convey info about how a building or object is built and wired, and or used for troubleshooting
What are the three types of electrical drawings?
Schematic, wiring, single-line
What is the purpose of a schematic drawing?
Show electrical operation and electrical relationship between components.
What are schematics most often used for?
Used to design or explain operation
What is another name for a schematic diagram?
Ladder
What is the purpose of a wiring diagram?
To show exactly how and where wires are connected and how wires are run between devices
What is the purpose of a single line diagram?
Shows the distribution of electrical energy from the line side.
What are wiring diagrams used for?
Useful for the initial wiring or tracing wires
What are single line diagrams usually used for?
Shows how major components are related. Riser diagrams usually show how power equipment is distributed across multiple floors.
What is another name for wiring diagram?
Connection diagram, sometimes called a highway type
What is point-to-point?
A type of wiring diagram, an individual wire is drawn for each connection.
The different between block and riser diagram?
Block diagram does not show position of components, riser diagram can give specific locations of components.
Where can you find electrical symbols on prints?
The legend
The two types of construction and assembly drawings.
Pictorial, orthographic projections
Three types of pictorial drawings.
Oblique, isometric, perspective
Describe visible lines.
Continuous solid line to show edges of an object
Describe hidden lines.
Short dashed lines. They show edges of objects that are hidden behind surfaces that are closer to view.
Describe centre lines.
A long dash followed by a short dash followed by a long dash, repeat. Shows the centre of an arch or circle
Describe section lines.
Diagonal lines to show an area has been cut or sectioned
Describe cutting plane lines.
Long dash followed by two short dashes followed by a long dash, repeat. Shows how a building is sectioned or an object is cut. Arrows indicate the direction you are looking when viewing the section
Describe phantom lines.
Short dashed lines, slightly larger than hidden lines. Show an alternate positions.
Describe long break lines.
Looks like a heart pulse. Used to show a view has been removed from the plan when there is not enough room or not necessary to show the whole object. does not mean it has been removed from real life.
Describe short break lines.
Looks like a squiggle. Used the same as a long break line but for short distances
Describe contour lines.
Used on plans to show elevation, think of looking at google maps. Lightweight irregular shaped lines are used.
What are cut break lines?
The difffrrent types of terminators
Slash, arrowhead, dot
What are dimension line?
Dimension lines are placed between extension lines to show the exact measurement of an object
What are extension lines?
Extend outward from either side of an object, dimension lines are placed inside
What is a leader line?
Used to point out locations on a drawing so a description can be given. Straight or wavy line with an arrowhead terminator.
What type of view does ‘site plan’ show?
Top view
What type of view does an ‘elevation’ show?
Side view
What does 1:2 scale represent?
What does 2:1 scale represent?
Reduced
Enlarged
The most common type of scale for electrical drawings
Metric
What are the names of divisions of working drawings?
Architectural, structural, mechanical, plumbing, electrical
What is the purpose of construction working drawings?
To provide all information necessary for all trades to construct without further explanation.
What is the final version of prints called?
As-is
What are the five types of working drawings?
Site/plot plans, plan drawings, elevation drawings, sectional drawings, detail drawings.
What type of plan is usually a floor plan?
Architectural
What is the real name for the eyeball?
Section reference symbol
What is a detail drawing?
Shows a small part of the plan in a more detailed view, with specific dimensions and pictorials.
Describe a shop drawing.
Drawings used by equipment manufacturers to show details of custom made equipment.
Drawings are usually made by the manufacturer or engineer.
Very useful to electricians.
Why are shop drawings so useful to electricians?
They show exact shapes and sizes of electrical equipment that will be installed.
Where can you find a list of all drawings in a set of prints?
Index
What are the two types of reference lines?
Grid lines, bay lines.
What are grid lines?
Evenly spaced numbers and letters across the exterior of the plan, used to pin point. Think of battleship.
What are bay lines?
Reference guide lines for specific objects. Drains through beams, posts, etc.
What is a schedule?
Method of presenting information in table like form
What are the different types of schedules?
Lighting, panel board, door, window, flooring, transformer
What is a specification?
A written description of work to be done. Usually supplied in a separate document or book containing standards and divisions.
Which specification divisions relate to electrical?
Div 23, 26, 27, 28
What is division 23?
HVAC
What is division 26?
Electrical. Materials, wiring methods, power, distribution and lighting.
What is division 27?
Communications. Data and extra low voltage
What is division 28?
Electronic safety and security. Alarms, surveillance, monitoring and control.
What is the most important division for electricians?
Decision 26.
Why is division 26 so important to electricians?
Includes scope of work, standard of workmanship, building codes, specs of equipment, testing instructions, mounting and installation heights, FA specs, material specs
What plan shows the ceiling structure and lighting layout?
Reflective ceiling.
What plan shows how all the parts of an individual detail drawing fit together?
Assembly drawing.
What drawing usually shows a parts list?
Assembly drawing.
What type of drawing provides information on parts and assembly?
Working detail-assembly drawing.
