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What is the clearance needed from the top of an Arc resistant Model 6 Motor control Center, to the ceiling, for C37.20.7 ANSI Rating ?

Issue:
What is the clearance needed from the top of an Arc resistant Model 6 Motor control Center, to the ceiling, for C37.20.7 ANSI Rating ?

Product Line:
Model 6 Motor Control Center

Environment:
Application

Cause:
Product Features

Resolution:
The minimum clearance in order to keep the ANSI C37-20-7 rating, would need to be at least 28.5" . Found in the attached Data Bulletin 8998DB1301, page 2, below. 
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