Supplemental and Obsolescence Digest Catalog (MAY 2023) This document is current but may reference obsolete products.

This updated catalog is based on the Supplemental Digest 178 printed in 2019. This book contains information on Load Centers, Heavy Duty Safety Switches and Accessories, Molded Case Circuit Breakers and Enclosures, Panelboards, Switchboards, Transformers, International Load Centers, International Safety Switches, International Circuit Breakers, International Panelboards, Obsolescent and Obsolete Circuit Breakers, Obsolete Motor Control Centers, Obsolescent Panelboards, I-Line Busway, Operating Mechanisms and Disconnect Switches, and Contactors and Starters. This document replaces Supplemental and Obsolescence Digest 177, document number SD_0100CT1502