Frequently asked questions
Do Multi 9 breakers have a 480 Vac delta rating?
FA87576
08 June 2022
Issue:Multi-9 (M9) breaker and 480 Vac breakers
Product Line:
Circuit Breakers
Resolution:
No, the Multi 9 breakers are not rated for 480 Vac delta.
The UL 1077 listed M9 is rated for 480Y/277 Vac, not 480 Vac delta.
The IEC version has a 440 Vac rating.
The UL 489 version has a 480Y/277 Vac rating (0.5 - 20 A), 240 Vac (0.5 - 35 A).