This document provides specifications for a Cummins SC138 diesel generating set with a 125 kVA prime power rating and 138 kVA standby power rating. Key details include: the generating set is powered by a Cummins 6BTAA5.9-G2 diesel engine; it has a Stamford or Leroy Somer alternator; a ComAp AMF20 control panel; and is available with or without soundproofing. Standard features include automatic start, an 8-hour fuel tank, a steel base, and voltage regulation within ±0.5%.