Looking at the 2023 NFPA 70, 680.5
(C) Above 150 Volts to Ground.
Where required in this article, ground-fault protection of receptacles and outlets on branch circuits operating at voltages above 150 volts to ground, not exceeding 480 volts phase-to-phase, single- or 3-phase, shall be provided with SPGFCI protection not to exceed 20-mA ground-fault trip current.
Anyone know of supply source for Siemens special purpose GFCI breakers?
(C) Above 150 Volts to Ground.
Where required in this article, ground-fault protection of receptacles and outlets on branch circuits operating at voltages above 150 volts to ground, not exceeding 480 volts phase-to-phase, single- or 3-phase, shall be provided with SPGFCI protection not to exceed 20-mA ground-fault trip current.
Anyone know of supply source for Siemens special purpose GFCI breakers?