The diagram displays an automatic transfer switch designated as ATS, rated for 300 amperes at 480Y/277 volts, three-phase, three-wire with a solid neutral. Conduit and conductor runs are indicated entering and leaving the unit with associated circuit designations.
AUTOMATIC TRANSFER SWITCH "ATS." 300A, 480Y/277V-3Ø-3W W/ SOLID NEUTRAL. 230 230
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