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What is the replacement for a QMB310T, Series 1 through Series 4 switch?

Issue:
Product replacement

Product Line:
QMB branch switches

Environment:
Replacement switch

Cause:
Application and or maintenance

Resolution:
This will depend on the the existing QMB panelboard interior. If the panel has round busbars, there is NO replacement. Otherwise, the replacement switch would be a QMB323TD providing the interior is Type QM(31-inch wide) manufactured after 1961 but before October 1984 OR if the interior is type QW (38-inch wide) manufactured before 1984. If the existing interior is the QW type, with flat bus bar, the QMB310LEX plug-on extension assembly may also be required. Use the outside poles. 



CTA-ID : 2033039
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