This transfer switch was returned from a customer job with no functional defects. The item may be missing original packaging and may have been used for testing or demo purposes.  There are holes from former conduit use (see photograph).
 
ASCO Transfer Switches make backup power possible. They enhance power availability by transferring electrical loads to alternate sources of power. From simple backup solutions to mission-critical facilities, transfer switches connect backup power to enhance safety and sustain operations.  The Series 300 has a standard design for commercial and light industrial facilities that are simple to procure, install and commission.
 
Product Range: 
Voltages (115-600 V)
Ampacities (30-3000 A)
Poles (2, 3, or 4)
Withstand & Closing Ratings (22-200 kA)
Time-Based Ratings (36-65 kA)
 
Product Highlights:
Outpatient Healthcare Facilities • Small & Midsize Businesses • Light Industrial Applications • Integrated & StandAlone Quick Connects