Modifying Fixed Units - Hach sc200 User Manual

Model 6 Motor Control Centers
Section 10—Expansion

Modifying Fixed Units

94
1. Turn off all power supplying this equipment before working on or inside
the equipment, and follow lockout/tagout procedures. Always use a
properly rated voltage sensing device to confirm the power is off.
2. If drilling holes in the back of the MCC unit saddle is required, do not drill
through the back of the saddle more than 0.1875 in. (5 mm). Use a drill
stop device for this procedure.
3. Perform the required modifications. Use thread-forming screws to mount
devices. Do not use bolts and nuts, as they could loosen over time and
cause property damage or personal injury. The hardware must not extend
beyond the back of the MCC unit saddle more than 0.25 in. (6 mm) or
beyond the sides and bottom pan by more than 0.125 in. (3 mm).
4. Make sure that proper electrical spacing
of opposite polarity and an exposed or uninsulated dead metal part is
maintained.
5. Use a vacuum cleaner to remove all debris left in the unit as a result of
the modifications. Do not use compressed air to blow out the unit,
because all debris may not be fully removed.
6. Perform the recommended maintenance procedures beginning on 56 of
this manual.
7. Use a megohmmeter to perform an insulation test as outlined on 66.
8. Follow the procedures for "Energizing the MCC" on page 54.
© 1999–2012 Schneider Electric All Rights Reserved
80459-641-01E
10/2012
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between uninsulated live parts