Technical FAQs

Ask a Question

What do the -M, -MW, and -W mean after part number QMB324?

QMB324 is a 200A Series D2 branch switch unit, may be used as replacement 200A switch for obsolete Series 1 thru 4 switches (see Supplemental Digest S&O173, page 13-3, -4).
QMB324M is 200A main switch unit, replaces obsolete Series 4.
QMB324MW is 200A main switch unit, replaces Series E1.
QMB324W is 200A current style Series E branch switch unit.



CTA-ID : 2025311
Was this helpful?
What can we do to improve the information ?