An electrical schematic shows the wiring layout for typical obstruction light fixtures mounted on the cab roof connected to a terminal cabinet located at the console access level. The system integrates a time clock and a photo-electric control switch to automate fixture operation. A twelve-inch by twelve-inch by six-inch NEMA 12 terminal cabinet houses a ten-point terminal strip, a hand-off-auto switch, an amber pilot light with an "Obstruction Lights Off" label, and a two-ampere ammeter mounted in the hinged door. Cabinet identification includes a nameplate reading "Obstruction Light Test Panel".
OBSTRUCTION LIGHT FIXTURES (TYP.) TIME CLOCK 12" X 12" X 6" NEMA 12 TERMINAL CABINET WITH HINGED DOOR. LOCATED IN CONSOLE ACCESS LEVEL 10 POINT TERMINAL STRIP HAND-OFF-AUTO SW MOUNTED IN DOOR 2A - AMP METER MOUNTED IN DOOR CABINET NAME PLATE "OBSTRUCTION LIGHT TEST PANEL" AMBER PILOT LIGHT MOUNTED IN DOOR LABEL "OBSTRUCTION LIGHTS OFF" A H O A NEUTRAL CAB ROOF FLSPL-CAB PC PHOTO-ELECTRIC CONTROL SW CONSOLE ACCESS LEVEL
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