Labels:book | bookcase | bulletin board | earth | encyclical | poster | rock | sky | vegetarianism | waterfall | windowpane OCR: 23 ELECTRICAL WIRING and LAYOUT SYMBOLS SWITCH OUTLETS SIGNALING SYSTEM OUTLETS SINGLE-POLE SWITCH NURSE CALL (ANY SYSTEM TYPE) DEVICES DOUBLE- -POLE SWITCH NURSES ANNUNCIATOR THREE -WAY SWITCH CALL STATION SINGLE-CORD, PLOT LIGHT FOUR WAY SWITCH CALL STATION DOUBLE -CORD KEY-OPERATED SWITCH MICROPHONE -SPEAKER SWITCH AND PILOT LAMP CORRIDOR DOME LIGHT, ONE LAME SWITCH FOR LOW-VOLTAGE TRANSFORMER SWITCHING SYSTEM ANY OTHER ITEM ON SAME SYSTEM SLM MASTER SWITCH FOR LOW-VOLTAGE (USE NUMBERS AS REQUIRED SWITCHING SYSTEM PAGING SYSTEM DEVICES (ANY TYPE) SWITCH AND SINGLE RECEPTACLE KEYBOARD SWITCH AND DOUBLE RECEPTACLE FLUSH ANNUNC IATOR DOOR SWITCH TIME SWITCH TWO -FACE ANNUNCIATOR ANY OTHER SCB CIRCUIT BREAKER SWITCH (USE NUMBERS ITEM AS ON SAME REQUIRED) SYSTEM S wCB WEATHER PROOF CIRCUIT F ...