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1TTS900001M0902
Switchboard earthing must be performed by means of copper conductor whose cross-sectional area is
not inferior to that of the earth busbar.
The doors are earthed by means of yellow-green copper conductors (cross-sectional area 2.5 mm
2
). No
connexion is necessary, if no energized element is connected to the door (≤ 50 V AC or ≤ 120 V DC).
Anyway, the connections of the protective conductor screwed on the painted surfaces must be
fastened by means of lock washers.
4.3.2 Protection Degree
According with the required protection degree, it is necessary to take care to seal the compartments in
the place of installation.
• For protection degrees ≥ IP X2 or ≥ IP 5X splice bar flanges must be sealed, if they had not yet been
sealed. To seal the splice bar flanges, use an adhesive sealant tape of 15 x 2 mm (GSIN100021P0010)
and apply it after cleaning the internal part of the flanges. The tape must protrude 3 mm from the edge
of the internal part of the flanges.
• For protection degrees ≥ IP X1 or ≥ IP 4X it is necessary to put a gasket between the compartments
(compartment/compartment) in the shipping division.
4.4 Final Preparations
• Remove the safety devices for the transportation of the heavy components of the apparatus.
• Assemble the equipment, as circuit breakers, fuses, lamps, meters. The various components are
opportunely labelled. Follow the enclosed assembly instructions.
• Remove foreign materials, as tools, packaging material and residuals.
• Clean the insulating parts by means of an antistatic cloth. Do not use carbon tetrachloride, trichlorethylene
or hydrocarbon solvents.
• Close the doors.
4.5 Check Operations
• Check the busbar connection to the transportation units. Tightening torque, Annexe A.
• Check base frame fastening.
• Check that the required protection degree is achieved, especially concerning the bottom closing.
• General visual inspection: appearance, completeness, labels, foreign materials in the switchboard,
and dirt.
• Check that cables connection and wiring connection has been carried out completely and correctly.
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