Electrical connection
Explosion-protected machines
122 56100000002002, 01/2016
6.6 Final checks
Before closing the terminal box/terminal base of the machine enclosure, check the
following:
● Establish the electrical connections in the terminal box in accordance with the
details in the sections above and tighten with the correct torque.
● Maintain air clearances between non-insulated parts:
≥ 5.5 mm up to 690 V, ≥ 8 mm up to 1000 V.
● Avoid protruding wire ends!
● In order not to damage the cable insulation, freely arrange the connecting cables.
● Connect the machine corresponding to the specified direction of rotation.
● Keep the inside of the terminal box clean and free from trimmed-off ends of wire.
● Ensure that all seals and sealing surfaces are undamaged and clean.
● Correctly and professionally close unused openings in the terminal boxes.
Before closing the terminal box, check that
● the air clearances for explosion-protected machines (with the exception of
machines for Zone 22) between non-insulated parts are maintained: ≥ 10 mm to
690 V.
● the minimum creepage distance for explosion-protected machines (with the
exception of machines for Zone 22) between non-insulated parts is maintained:
≥ 12 mm to 690 V.
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