48 Mechanical installationMiscellaneous Cable duct in the floor below the cabinetA cable duct can be constructed below the 500 mm wide middle part of the cabinet. Thecabinet weight lies on the two 50 mm wide transverse sections which the floor must carry.Prevent the cooling air flow from the cable duct to the cabinet by bottom plates. To ensurethe degree of protection for the cabinet, use the original bottom plates delivered with thedrive. With user-defined cable entries, take care of the degree of protection, fire protectionand EMC compliance. Arc weldingABB does not recommend attaching of the cabinet by arc welding. However, if arc weldingis the only mounting option, proceed as follows: Connect the return conductor of thewelding equipment to the cabinet frame at the bottom within 0.5 meters (1.5 ft) of thewelding point.Note: The thickness of the zinc coating of the cabinet frame is 100 to 200 micrometers.WARNING! Make sure that the return wire is connected correctly. Welding currentmust not return via any component or cabling of the drive. If the welding returnwire is connected improperly, the welding circuit can damage electronic circuits inthe cabinet.WARNING! Do not inhale the welding fumes.500 (19.68”) 50 (1.97”)500 (19.68”)50 (1.97”)
