Line bushings



  • Space-saving construction as many single cores are gathered in one single sleeve thus requiring only one cable entry hole
  • Motor mains and thermoprotection cables can be exited in one common sleeve
  • Numbered cores simplify connections and eliminate the usual “Ring out“ in larger control systems
  • On the Ex d side, the cores are connected directly to the electrical load, intermediate terminals are no longer necessary
  • Small dimensions allow a rated insulation voltage of up to 3 kV
  • Blue cores for Ex i low power circuits
  • Permanent heat-resistance of the cores up to +110°C


Ex II 2G Ex db IIC
Ex I M2 Ex db I
Ex db IIC
Ex db I

Ambient temperature

-60 °C to +110 °C
depending on the lead used and static test pressure (temperature ranges apply to the “fixed installation” of leads)


EPS 13 ATEX 1619U
IECEx EPS 13.0045U
PTB 97 ATEX 1047 U
IECEx PTB 06.0093U
CSA 2227587
UL OWLJ8.E225236 Canada
UL OWLJ2.E225236 USA
UL OWLG8.E225236 Canada
UL OWLG2.E225236 USA
FM J.I. 1Q5A5.AE
TC RU C-DE.GB06.B.00504


A line bushing is a component for the electrical connection between a flameproof “d“ enclosure and an increased safety “e“ terminal box. The bushing consists of a threaded or non-threaded metal sleeve encapsulating one or more cores providing a flameproof barrier. The lengths of these leads vary according to their applications. The depth of engagement of the threaded sleeves and the joint length of the cylindrical sleeve in the wall of the “d“ enclosure must correspond to the EN 60079-0 and EN 60079-1 standards. After installation the bushing must be protected against rotation and accidental loosening. Recommendations are given under “Accessories“. Our standard bushings come with threaded sleeves from M10 to M48 or with cylindrical sleeves. They are equipped with cores with a 0.2 to 95 mm2 csa. and approved for nominal voltages between 250 V and 3 000 V. See also table “Electrical data“.

For the connection of intrinsically safe circuits in the “d“ area with the terminal strip in the connection compartment we provide line bushings with blue cores for “i“ low power circuits.

Technical data *

Dimensions see data sheet
Voltage Rated voltage: 690 V/1 000 V/3 000 V
Current see data sheet
Connection max. number of cores: 50 cores
Cross-section: 0.25 mm² to 120 mm² AWG24 to AWG1
Sleeve size: metric: M16 x 1.5 to M42 x 1.5
non-threaded: ∅ 22 mm to ∅ 36 mm
Sleeve material: Metal, bare, varnished or galvanised

*Refer to the documentation for more detailed information


Data Sheet - Line bushings

Customer requirements - Cable entries/line bushings

Operating Instructions - Line bushing Type 07-91-..