FAQ Search

How do you wire a QO/QOB shunt trip breaker (ex. QO120-1021)?

Connect the appropriate voltage (ie. 120V to 240V for the -1021 suffix) to the two terminals on the shunt trip. Land the switchleg from the source contact on one terminal ( either) and the neutral wire (L2 , X2 ) to the other terminal . The shunt trip has coil clearing contacts that open when the voltage is applied so either momentary or maintained contacts can be used to initiate voltage .


CTA-ID : 2008528
FA103075  |  14-Jan-2011  | Wiring
  • Please rate the content of this information
    Unhelpful 1 2 3 4 5 Helpful