Light Fixtures

• Ceiling/Wall fixtures– surface– recessed

• Fan (exhaust)

• Junction box

• Fluorescent fixtures

Switches

• Single Switch

• 3-way Switch

• 4-way Switch

• Dimmer Switch

• Timer Switch

Electrical Symbols - Miscellaneous

Electrical Code/Drafting Practice• Duplex convenience outlets (wall plugs) should be a

maximum of 12’ apart. Closer spacing is desirable, although economy is a factor. Code reads: “no point along a wall is further than 6’ from an outlet.”

• Duplex convenience outlets should be no more than 6’ from a corner

• There should be a duplex outlet in any usable wall space over 2’ long

• Place a (one) duplex outlet in a hallway

Outlet Placement Example

Electrical Code/Drafting PracticeKitchen /Bathroom areas– usable counter space of 12” & greater require an outlet– outlets are required every 48” of counter space (with new

code text is in error)– note mounting height for outlets above counter (+44”)– special purpose outlets for garbage disposal, dishwasher,

separate oven, and hood– range outlet for electric range– GFI or GFCI protection for any outlets in rooms with a

water source.

Switch/Outlets Examples

Switching Examples

Switching• Switch symbol and

fixture are connected with a dashed line using a irregular curve

• Single Switching

• 3-Way Switching

• 4-Way Switching

Switching an Outlet

Switching a Porch Light

+(MOUNTING HEIGHT)

Electrical Plan Example

Special Project Elect Plans (50 Points)

• Add electrical symbols and all electrical information to your plans:– Foundation plan (3 light +switch, one outlet and

special purpose outlet for water heater)– First level floor plan (two exterior WP outlets, lights

at all entrances, elect range w/ hood above, garbage disposal, dishwasher outlet, and washer/dryer outlets)

– Second level floor plan (exhaust fans in bathrooms, 3-way switch to 1st floor for stair light)

– Complete an electrical schedule (10 points) for all the symbols used similar to one shown in Handout

Electrical Symbol Schedule

• Purpose of schedule is to identify and describe electrical symbols used in the set of working drawings

• Categories– Symbols– Descriptions