240634 / 8146662300
2019-05-27·BA00·III·en·04
Mounting and Installation
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Safety temperature monitor and limiter
Series 8146/5041-STW, 8146/5041-STB,
8146/5051-STW+STB
Terminal blocks in Ex e enclosure
7.3.4 External Wiring
Protective conductor
• Always connect the protective conductor.
• Regardless of the operating voltage, connect all uncoated and non-energised metal
parts to the protective conductor system.
• The neutral conductor is considered a live conductor and it has to be installed
accordingly.
• Inactive metal parts are insulated in accordance with IEC/EN 61439 and not connected
to PE.
Observe the following when working on terminal blocks:
• Observe the test certificate of the terminals.
• Terminal bridging is only permitted if original Ex accessories are used.
• If necessary, retrofit required partitions.
• For additional splice protection, use core end sleeves or cable lugs.
• Make sure that the cross section of the splice protection matches the
conductor cross section.
DANGER
Explosion hazard due to insufficient protective measures!
Non-compliance results in severe or fatal injuries.
• Select suitable cables to ensure that the maximum permissible
conductor temperatures are not exceeded.
• When using core end sleeves, attach them using a suitable tool.
• Observe the insulating capacity and separation distances between
intrinsically safe and non-intrinsically safe circuits according to
IEC/EN 60079-14, section 12.
• Use only separately tested cable entries and stopping plugs with
an EU Type Examination Certificate.
• Guide the conductor insulation so that it reaches the terminal.
• Do not damage the conductor when removing the insulation
(e.g. nicking).
• Always connect the protective conductor.
Information regarding the equipotential bonding (PA), earthing (PE) and
intrinsically-safe circuits is given in the documentation of the installed
devices.
