Transcript 20 Electrical Plans

Electrical Plans
Electrical Plans
• Displays all of the circuits and systems to
be used by the electrical contractor during
installation
• Items to show on plans
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all outlets
all light fixtures connected to switches
all switches connected to light fixtures
all miscellaneous and low voltage items
• no connection necessary with low voltage items
– power panel and electrical meter
Electrical Plans
Methods used to show electrical systems on drawings
– 1 Add-on existing plans along with all other symbols, information, a
dimensions
• common practice on simple floor plans
• eliminates extra sheets and simplifies working drawings
• sometimes makes drawings difficult to read
– 2 Separate sheets for electrical information
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common practice on complex floor plans
separates electrical information from other drawing data
requires time to duplicate floor plans unless CAD dwgs
adds more blueprints to set of working drawings
Electrical Plans Example
Size and Drafting the Symbols
As noted on handout (units given below are full size units taken
from the 16 scale)
– Size of outlet symbol = 1/8” diameter circle
– Size of light fixture symbol = 1/4” diameter circle
– Size of fluorescent symbol = 1/8” x 1” (6”x48” real size)
– Size of switch symbol = 1/8” lettering
– Size of push button symbol = 3/16” square
– Size of electrical panel = 3/8”long and fill 1/2 of wall
– Size of meter base, etc. = 1/4” square
Outlets
• Symbol
– as shown on
plan
• Wall View
– finished state
• Description
– explanation
Duplex Outlet with Switch
Appliance vs. Voltage and Symbol
• Refrigerator
120 volts
• Stove
240 volts
• Hood
120 volts
R
H
• Oven
240 volts
• Garbage Disposal 120 volts
• Dishwasher
120/240 volts
O
GD
Appliance vs. Voltage and Symbol
• Clothes washer
120 volts
• Clothes dryer
240 volts
• Air Conditioner 120/240 volts
• Water heater
• Furnace
AC
240 volts
120/240 volts
WH
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