Mechanical installation
67
Electric welding
It is not recommended to fasten the cabinet by welding. If the other fastening
methods cannot be used, follow the welding instructions below.
Cabinets without flat bars at the base
• Connect the return conductor of the welding equipment to the cabinet frame at
the bottom within 0.5 metres of the welding point.
Cabinets with flat bars at the base
• Weld only the flat bar under the cabinet, never the cabinet frame itself.
• Clamp the welding electrode onto the flat bar about to be welded or to the next flat
bar within 0.5 metres of the welding point.
WARNING! If the welding return wire is connected improperly, the welding circuit
may damage electronic circuits in the cabinet. The thickness of the zinc coating of
the cabinet frame is 100 to 200 micrometres; on the flat bars the coating is
approximately 20 micrometres. Ensure that the welding fumes are not inhaled.
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