Bus Bars and Incoming Line Compartments
WARNING: There is a hazard of electrical shock
or burn whenever working in or around electrical
equipment before working on it.
Maintenance of bus and incoming and line lug
connections should be performed at least
annually, or more frequently, depending on
maintenance policy. The procedure outlined
below should be followed at the time of
installation to locate and tighten any connections
which may have loosened during shipment and
CAUTION: Never brush or sandpaper the bus
because this will remove plating and cause
oxidation. Use a cleaning fluid approved for such
use. Do not use cleaning fluid on insulators.
Uncover all bus connections by removing the top
unit in each vertical section (See Procedure M-
17, page 18).
M-6 If bus barriers have been provided, remove
the top vertical bus barriers in the following
Remove retaining screws from the vertical
Remove front barrier from vertical bus by
lifting and pulling toward you.
Remove retaining screws from the horizontal
bus barriers and remove right or left hand
barriers for access to splice bar connections
(only on sections adjacent to your shipping
Examine all bus bars and connectors Replace
any parts that are badly discolored, corroded or
pitted or have been subjected to excessive
CAUTION: Do not attempt to clean bus bars or
connectors which are in any way damaged.
Replace them with new parts.