Can a QO1HT handle tie be used to tie 3 single pole QO or QOB breakers together?
Electrical Distribution Equipment
No. These handle ties are made to link only two single pole breakers together to provide a common on/off capacity.
The correct handle tie to use for this application is either QOHT2 for 2 single pole breakers or QOHT3 for 3 single pole breakers. Another option for 3 single pole breakers that includes a padlock attachment is QO3HT.