2Electrical PlansDisplays all of the circuits and systems to be used by the electrical contractor during installationItems to show on plansall outletsall light fixtures connected to switchesall switches connected to light fixturesall miscellaneous and low voltage itemsno connection necessary with low voltage itemspower panel and electrical meter
3Electrical Plans Methods used to show electrical systems on drawings 1 Add-on existing plans along with all other symbols, information, and dimensionscommon practice on simple floor planseliminates extra sheets and simplifies working drawingssometimes makes drawings difficult to read2 Separate sheets for electrical informationcommon practice on complex floor plansseparates electrical information from other drawing datarequires time to duplicate floor plans unless CAD dwgsadds more blueprints to set of working drawingsUse for class
5Size 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 circleSize of light fixture symbol = 1/4” diameter circleSize of fluorescent symbol = 1/8” x 1” (6”x48” real size)Size of switch symbol = 1/8” letteringSize of push button symbol = 3/16” squareSize of electrical panel = 3/8”long and fill 1/2 of wallSize of meter base, etc. = 1/4” square
6Outlets Symbol Wall View Description as shown on plan finished state explanation
13Electrical 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 cornerThere should be a duplex outlet in any usable wall space over 2’ longPlace a (one) duplex outlet in a hallway
15Electrical Code/Drafting Practice Kitchen /Bathroom areasusable counter space of 12” & greater require an outletoutlets 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 hoodrange outlet for electric rangeGFI or GFCI protection for any outlets in rooms with a water source.
22Special 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
23Electrical Symbol Schedule Purpose of schedule is to identify and describe electrical symbols used in the set of working drawingsCategoriesSymbolsDescriptions