PB 1.1-2007
Page 19
10.6.4.3 Clean, Light Grease
If no instructions are given on the devices, sliding copper contacts, operating mechanisms, and interlocks
may be lubricated with clean, light grease.
10.6.4.4 Excess Lubrication
Wipe off excess lubrication to avoid contamination.
CAUTION—Hydrocarbon spray propellants and hydrocarbon based sprays or compounds will cause
degradation of certain plastics. Contact the panelboard manufacturer before using these products to clean,
dry, or lubricate panelboard components during installation or maintenance.
10.6.5 Accessible Copper Electrical Contacts, Blades, and Jaws
Clean and dress readily accessible copper electrical contacts, blades, and jaws according to the
manufacturer's instructions when inspection indicates the need.
10.7 DAMAGED INSULATING MATERIAL AND ASSEMBLIES
Look for and replace damaged insulating material and assemblies where sealing compounds have
deteriorated.
10.8 MOISTURE OR SIGNS OF PREVIOUS WETNESS OR DRIPPING
Look for any moisture or signs of previous wetness or dripping inside the cabinet.
NOTE—Condensation in conduits or dripping from outside sources is one known cause of panelboard malfunction.
10.8.1 Conduits Which Have Dripped Condensate
Seal off any conduits which have dripped condensate, and provide means for further condensate to drain
away from the panelboard.
10.8.2 Cracks or Openings
Seal off any cracks or openings which have allowed moisture to enter the enclosure. Eliminate the source of
any dripping on the enclosure and any other source of moisture.
10.8.3 Insulating Material Which is Damp or Wet
Replace or thoroughly dry and clean any insulating material, which is damp or wet or shows an
accumulation of deposited material from previous wettings.
10.8.4 Component Devices Which Show Evidence of Moisture Damage
Inspect all component devices. Replace any component device which shows evidence of moisture damage
or has been subjected to water damage or flooding. Additional information may be found in the NEMA
document “Guidelines for Handling Water Damaged Electrical Products.”
10.9 BEFORE CLEANUP AND CORRECTIVE ACTION IS ATTEMPTED
In the event of water damage, e.g., flooding or sprinkler discharge, the manufacturer should be consulted
before clean up and corrective action is attempted.
© Copyright 2007 by the National Electrical Manufacturers Association.
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