BERTHOLD TECHNOLOGIES LB 6775, Operating Manual

Page: 25 / 118

LB 6775 2 Safety Manual / Explosion Protection Manual
63039BA26, Rev. 03, 07/2018
25
2.7 Connection Compartment
Screw Connections
NOTICE
If it cannot be excluded that the cable gland might have suffered damage (e.g.
by a mechanical shock), then the cable gland and in particular the threads
should be checked for damage and replaced if necessary.
•
Only such threaded joints should be permitted that at least technically meet the
standard level listed on the cover page of LB 6775 EC-type examination certifi-
cate.
•
Threaded joints must have at least degree of protection IP65 or Type for 4X for
HazLoc location “Divisions” installations.
•
Only use threaded joints that are suitable for the cable type (armoured, non-
armoured, ...) and the cable cross section.
•
When using adapters for thread adjustment (e.g. thread reduction), only one
adapter may be used.
•
Only replace threaded joints with those of the same type.
Connecting Terminals
•
Permissible max. conductor cross section rigid: 0,2 mm² ... 1,5 mm² (AWG 24 ...
16)
•
Permissible max. conductor cross section flexible : 0,2 mm² ... 1,0 mm²
•
Permissible max. conductor cross section wire end sleeves: 0,25 mm² ... 0,75 mm²
•
Lay the connecting cables in the connection compartment so that
o
no dirt and humidity gets into the connection compartment.
o
the conductors are not damaged when the cable insulation is removed.
o
the distances between bare conductors comply with the clearance and creep-
age distances.
o
the conductors are placed U-shape around the screw of the connection ter-
minal.
o
clamped conductors in the connection terminals meet a pull-out test ac-
cording to IEC 60947-1 for 1 minute:
- 30 N pull-out force for 0.5 mm 2 cross section and
- 50 N pull-out force for 2.5 mm 2 cross section
+
the conductive parts of the connection lines are completely in the terminals.
•
The connection of superfine stranded conductors of class 6, according to IEC
60228, is not permitted.