Siemens 1PH818 Operating Instructions & Installation Instructions page 134

Technical specifications
B.1 Tightening torques for screw and bolt connections
Applications
The above-mentioned tightening torques apply for the following applications:
● Case A
● Case B
● Case C
134
Applies to electrical connections in which the permissible torque is normally limited by the
bolt materials and/or the current carrying capacity of the insulators, with the exception of
the busbar connections in case B.
Applies to bolts screwed into components made from materials with lower property class
(e. g. aluminum) and to bolts with property class 8.8 according to ISO 898-1.
Applies to bolts with property class 8.8 or A4-70 according to ISO 898-1, however only to
bolts screwed into components made from materials with higher property class, e.g. cast
iron, steel or cast steel.
Note
Non-standard tightening torques
Different tightening torques for electrical connections and bolted connections for parts with
flat seals or insulating parts are specified in the relevant sections and drawings.
SIMOTICS M-1PH8 1PH818., 1PH822.
Operating Instructions 07/2016