Hi all,
in an industrial plant, I specified Eaton "DH367U" 800 A, Unused heavy duty switch, NEMA 4X enclosure, in a class I Division 2 area for maintenance of 400 HP motor. This switch is for is not intended to interrupt the current in normal condition. Over current and overload protection are being taken care at the upstream feeder.
I received an RFI from t asking "what purging system you need to install for this NEMA 4X since it is located in a class I Division 2 area".
I specified this safety switch based on my interpretation to the NEC 501.115 (B) (2): "Isolating Switches. Fused or un-fused disconnect and isolating switches for transformers orcapacitor banks that are not intended to interrupt current in the normal performance of the function forwhich they are installed shall be permitted to be installed in general-purpose enclosures."
Please advise/confirm whether this installation conform with Code requirements or is a violation.
Thanks.
in an industrial plant, I specified Eaton "DH367U" 800 A, Unused heavy duty switch, NEMA 4X enclosure, in a class I Division 2 area for maintenance of 400 HP motor. This switch is for is not intended to interrupt the current in normal condition. Over current and overload protection are being taken care at the upstream feeder.
I received an RFI from t asking "what purging system you need to install for this NEMA 4X since it is located in a class I Division 2 area".
I specified this safety switch based on my interpretation to the NEC 501.115 (B) (2): "Isolating Switches. Fused or un-fused disconnect and isolating switches for transformers orcapacitor banks that are not intended to interrupt current in the normal performance of the function forwhich they are installed shall be permitted to be installed in general-purpose enclosures."
Please advise/confirm whether this installation conform with Code requirements or is a violation.
Thanks.