UL 508 Industrial Control Equipment – Underwriters Laboratories
IEC 60947 Low Voltage Switchgear and Controlgear – International Electrotechnical Commission
ANSI/IEEE C62.41 – American National Standards Institute/Institute of Electrical & Electronics Engineers
A. Manufacturer Warranty: The manufacturer shall guarantee the equipment to be free from material and workmanship defects for a period of five years from the date of manufacture when installed and operated according to the manufacturer’s requirements.
The equipment shall be immune to electrostatic discharge per IEC 61000-4-2, Level 3, 6kV contact discharge and 8kV air discharge.
The equipment shall be immune to electrical fast transient bursts exceeding IEC 61000-4-4, Level 4. Specified limits shall be 2kV line-to-line and 4kV line-to-ground.
The equipment shall be immune to electrical surges per IEC 61000-4-5. Specified limits shall be Level 3, 4kV line-to-line, and Level 4, 4kV line-to-ground.
Dielectric Isolation: Equipment withstands an alternating current potential of 1000V plus twice the rated voltage of the equipment for 1 minute without breakdown between uninsulated live parts and the enclosure with the contacts open and closed; between terminals of opposite polarity with the contacts closed; and between uninsulated live parts of different circuits.