Manual | MNS-SG Operation and Maintenance 45
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Torque fasteners
8.1.
Torque table
Torque fasteners as specified below when assembling the
switchgear. The Eslok® fasteners provided are
maintenance free. See Eslok® fasteners in this manual for
more information.
Busbar torque values (copper-to-copper)
Ground bars
Initial tightening torque values
MNS-SG torque table
UNION DESCRIPTION
SCREW
Metric (Nm)
English
(ft/lbs)
Splice kit connections
Copper-copper, other
connectors (splice kit)
M12
70
52
Breaker connections
Breaker stabs
M12
70
52
Breaker grounding stab
M12
70
52
Busbar ground connections
Copper-copper for
grounding
M12
60
44
Copper-copper for
grounding
M10
50
37
Copper support for
grounding
M10
40
30
Copper support for
grounding
M8
30
22
Insulating barrier and support connections
GPO3 glastic inserts
M6
20
15
GPO3 glastic-Iron
M6
20
15
GPO3 glastic-Iron
M8
25
18
GPO3 glastic-brass
M8
25
18
GPO3 glastic-copper
M12
50
37
Exterior metal panels and enclosures
Iron-iron
M8
20
15
Iron-iron
M6 Self-
tapping
4.7
35
Insulators-iron
M12
60
44
Insulators-copper
M12
50
37
MBB and Insulators
M12 Hexagon screw and nut
Torque 70 Nm (52 ft/lbs)
Connection bar from cradle to cable compartment
M12 Hexagon screw and nut
Torque 70 Nm (52 ft/lbs)
Connection bar from cradle to DBB
M12 Hexagon screw and nut
Torque 70 Nm (52 ft/lbs)
Connection Link and DBB
M12 Hexagon screw and nut
Torque 70 Nm (52 ft/lbs)
Connection Link and DBB
M12 Hexagon screw and nut
Torque 70 Nm (52 ft/lbs)
Ground bar connections
M12 Hexagon head screw and nut
Torque 60 Nm (44 ft/lbs)
M6 Pan head self-taping screw
Torque 4.7 Nm (3.5 ft/lbs)
