ReadTheSet
Electrical, scale 1/8" = 1'-0"

E-101, Level 1 Power and Lighting Plan

Receptacles, switches, home runs, panel tag, lighting fixture types.

The drawing

E-101 Level 1 Power and Lighting Plan, Millbrook Branch LibraryARCH D sheet, 36 by 24 inches. Drawn at 1/8" = 1'-0". Use the layer tray and the measure tool below the drawing.ABCDE123VESTIBULE101LOBBY102CIRCULATION DESK103CHILDREN'S LIBRARY104COMMUNITY ROOM105CORRIDOR114STAIR 1112ELEVATOR113TOILET108TOILET109ELECTRICAL111MECHANICAL110STAFF WORKROOM107STORAGE106XXXXGFCIGFCIGFCISSSSSSSS3S3LP1-1LP1-2LP1-3LP1-4LP1-5LP1-6LP1-7LP1-8LP1-9LP1-10LP1-11LP1-12LP1-13LP1-15LP1-17LP1LP1, 225 A, 120/208 VOLT, THREE PHASE, FOUR WIREN08'-0"16'-0"24'-0"32'-0"1/8" = 1'-0"1 LEVEL 1 POWER AND LIGHTING PLANSCREENED BACKGROUND IS A-101, FOR REFERENCE ONLYELECTRICAL LEGENDType A recessed trofferType B recessed downlightXType C exit signDuplex receptacle, 18 in above the floorGFCIGround fault receptacleQuadruplex receptacleSSingle pole switch, 48 in above the floorS3Three way switch, one of a pairPanelboard, tagged to its scheduleSDSmoke detector, on the fire alarm circuitLP1-1Home run to the panel, with panel and circuitELECTRICAL GENERAL NOTES01. Circuit numbers shown on a home run are panel and circuit. LP1-3 iscircuit 3 in panel LP1 in Electrical 111.02. Mount receptacles 18 in to centre above the finish floor and switches48 in to centre unless an interior elevation says otherwise.03. Every receptacle within 6'-0" of a sink is ground fault protected,whether or not the plan marks it.04. Exit signs and emergency lighting are on a single circuit with integralbattery back up, and stay on when the branch circuit is off.05. Provide a separate neutral for every branch circuit. Shared neutrals arenot permitted on this project.06. Coordinate every ceiling device with the reflected ceiling plan and withthe ductwork on M-101 before rough in.07. Label every panel directory in typed form with the room names used onthe architectural plans.PANEL LP1 SCHEDULECKT123456789101112131415171921DESCRIPTIONVestibule 101 and Lobby 102 lightingLobby 102 receptaclesChildren's Library 104 lightingChildren's Library 104 receptaclesCommunity Room 105 lightingCommunity Room 105 receptaclesCorridor 114 and Stair 112 lightingStaff Workroom 107 receptaclesToilet 108 and 109 lighting and exhaust fanToilet 108 and 109 ground fault receptaclesExit signs and emergency lightingCirculation Desk 103 receptacles and dataCirculation Desk 103 and Storage 106 lightingExterior wall packs and site lightingWater heater WH-1Mechanical 110 and Electrical 111 lighting and receptaclesElevator 113 cab lighting and receptacleFire alarm control panelBREAKER20 A20 A20 A20 A20 A20 A20 A20 A20 A20 A20 A20 A20 A20 A40 A20 A20 A20 APOLES111111111111112111LOAD VA96010801180108011201440640108042036024014405207806000720480300LP1: 120/208 volt, three phase, four wire, 225 A bus, 42 spaces, surface mounted in Electrical 111.LIGHTING FIXTURE SCHEDULETYPEABCDDESCRIPTIONRecessed troffer, 2'-0" by 4'-0"Recessed downlight, 6 in apertureExit sign, single face, with directional arrowWall pack, exterior, full cut offLAMPLED, 3500 K, 4000 lumensLED, 3000 K, 1100 lumensLED with integral batteryLED, 4000 K, 3000 lumensWATTS3814426MOUNTINGRecessed in lay in ceilingRecessed in gypsum ceilingWall or ceiling mountedSurface, 10'-0" above gradeNorthgate Design StudioArchitecture and interiorsStructural and civil: Kestrel EngineeringPROJECTMillbrook Branch Library412 Kestrel Avenue, MillbrookMillbrook Public Library DistrictProject number 2026-114ISSUE2026-08-14 Issued for constructionSCALE1/8" = 1'-0"DRAWNKECHECKEDQAREVISIONSNODATEDESCRIPTIONSHEET TITLELevel 1 Power and Lighting PlanSHEET NUMBERE-101
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How to read this sheet

An electrical plan is two drawings printed on top of each other: the lighting and the power. Both sit on the same screened architectural background from A-101, and neither of them is drawn to scale in the way a wall is. An electrical symbol shows what a device is and roughly where it goes; the exact mounting height comes from the notes and the interior elevations, not from measuring the plan.

Read the lighting first. Each fixture is a symbol with a type letter behind it, and the type letter is the link to the lighting fixture schedule at the bottom of the sheet. Type A is the recessed troffer that lights the large rooms. Type B is the small downlight used in the vestibule, the corridor and the toilet rooms. Type C is an exit sign, and it is drawn wherever an exit has to be marked. The schedule gives the lamp, the wattage and the mounting for each type, so counting fixtures on the plan and reading the schedule row is how you get a load or a lamp order.

Now read the power. A circle with a line through it and a stem is a duplex receptacle, two outlets. The same symbol with extra bars is a quadruplex, four outlets. The one marked GFCI is ground fault protected, which is what goes anywhere near water. An S is a single pole switch and an S with a small 3 is a three way switch, always one of a pair, so the corridor lights can be turned on from either end.

The part that ties the sheet together is the home run. A home run is a short line ending in an arrow with a label like LP1-3 beside it. Read it as panel LP1, circuit 3. The arrow does not show the route of the wire; it says that everything on that branch goes back to that circuit in that panel. Now find panel LP1 on the plan, in Electrical 111, and find circuit 3 in the panel schedule. The schedule row names the circuit, gives the breaker size in amperes, the number of poles, and the connected load in volt amperes. Every home run label on this plan has a row, and reading tag to row is the drill.

Two things new readers get wrong. First, a two pole breaker occupies two spaces and serves a 208 volt load such as the water heater, so a 40 A two pole entry is not the same as two 20 A single pole entries. Second, spare and space are different: a spare is a breaker installed with nothing on it, a space is an empty slot with no breaker at all.