94 Publication 2100-IN012C-EN-P - April 2009
Chapter 9 Maintenance
18. Refer to individual user policies, NFPA 70B, Recommended
Practice for Electrical Equipment Maintenance for MCC Servicing
Guidelines.
Disconnect the Switch and
Contact Lubrication
If a switch that is used frequently becomes difficult to operate or is
located in a highly corrosive or caustic environment, it may require
lubrication. The lubricant to be used is NO-OX-ID Compound (catalog
number 2100H-N18 for a 1 pt can or catalog number 2100H-N18T for
a 1 oz tube). To obtain the lubricant, contact your local Rockwell
Automation Sales Office, distributor or Rockwell Automation.
1. Determine your unit type.
Plug-in Units
If a disconnect switch requires lubrication and is housed in a
plug-in unit, remove the plug-in unit from the MCC (For removal
of unit, refer to Chapter 4
, Installing and Removing Plug-in
Units, before lubricating the switch).
Frame Mounted Units
If a disconnect switch requires lubrication and is housed in a
frame mounted unit, turn off the power sources to the MCC so
the switch can be lubricated.
ATTENTION
Follow NFPA 70E safety guidelines when working on energized
equipment.
To prevent injury or death to personnel lubricating disconnect
switch contacts, make sure the MCC power source(s) is
disconnected and the respective disconnect(s) is locked in the
OFF/O position. For plug-in units, remove the unit from the
MCC.
To prevent personal injury or damage to equipment, make sure
that the unit handle operator is in the OFF/O position before
removing the unit.
ATTENTION
To prevent injury or death to personnel lubricating
disconnect switch contacts, make sure that the MCC
remote power sources are disconnected and the
respective disconnects are locked in the OFF/O position.
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