PB 1.1-2007
Page ii
6.10 Debris ......................................................................................................................................12
6.11 Steps In Section 7 ...................................................................................................................12
Section 7 STEPS TO BE TAKEN BEFORE ENERGIZING.................................................................... 13
7.1 Accessible Electrical Connections........................................................................................... 13
7.2 Blocks and Packing Materials .................................................................................................13
7.3 Switches, Circuit Breakers, and Other Operating Mechanisms.............................................. 13
7.4 Short Circuits and Ground Faults............................................................................................ 13
7.5 Ground Fault Protection System ............................................................................................. 13
7.6 Adjustable Time Current Trip Device Settings ........................................................................ 13
7.7 Grounding Connections........................................................................................................... 13
7.8 Foreign Material....................................................................................................................... 14
Section 8 INSTALLATION OF CABINET FRONT.................................................................................. 15
8.1 Cabinet Front or Trim Package ............................................................................................... 15
8.2 Unpacking................................................................................................................................15
8.3 Covers and Doors....................................................................................................................15
8.4 Touch-Up.................................................................................................................................15
8.5 Front Alignment ....................................................................................................................... 15
Section 9 ENERGIZING EQUIPMENT....................................................................................................16
9.1 Qualified Personnel ................................................................................................................. 16
9.2 Load on the Panelboard .......................................................................................................... 16
9.3 Energized in Sequence ...........................................................................................................16
9.4 Loads Such as Lighting Circuits, Contactors, Heaters, and Motors ....................................... 16
Section 10 MAINTENANCE......................................................................................................................17
10.1 Maintenance Program ............................................................................................................. 17
10.2 Panelboard Which Has Been Carrying Its Regular Load for at Least 3 Hours.......................17
10.3 Inspect Panelboard Once Each Year...................................................................................... 17
10.4 Accumulation of Dust and Dirt................................................................................................. 17
10.4.1 Visible Electrical Joints and Terminals...................................................................... 17
10.4.2 Conductors and Connections.................................................................................... 17
10.4.3 Fuse Clip Contact Pressure and Contact Means...................................................... 18
10.4.4 Plug Fuses ................................................................................................................ 18
10.4.5 Conditions Which Caused Overheating.................................................................... 18
10.5 Proper Ampere, Voltage, and Interrupting Ratings ................................................................. 18
10.5.1 Mechanisms Free and in Proper Working Order ...................................................... 18
10.6 Operation of all Mechanical Components ...............................................................................18
10.6.1 Switch Operating Mechanisms ................................................................................. 18
10.6.2 Integrity of Electrical and Mechanical Interlocks....................................................... 18
10.6.3 Missing or Broken Parts............................................................................................ 18
10.6.4 Manufacturer’s Instructions.......................................................................................18
10.6.5 Accessible Copper Electrical Contacts, Blades, and Jaws.......................................19
10.7 Damaged Insulating Material and Assemblies........................................................................19
10.8 Moisture or Signs of Previous Wetness or Dripping................................................................19
10.8.1 Conduits Which Have Dripped Condensate .............................................................19
10.8.2 Cracks or Openings ..................................................................................................19
10.8.3 Insulating Material Which is Damp or Wet................................................................ 19
10.8.4 Component Devices Which Show Evidence of Moisture Damage...........................19
10.9 Before Cleanup and Corrective Action is Attempted............................................................... 19
10.10 Severe Electrical Short Circuit.................................................................................................20
10.11 Ground Fault Protection System ............................................................................................. 20
10.12 Insulation Resistance ..............................................................................................................20
10.12.1 Severe Short Circuit................................................................................................20
10.12.2 Parts Replaced........................................................................................................ 20
10.12.3 Panelboard Exposed to High Humidity ................................................................... 20
© Copyright 2007 by the National Electrical Manufacturers Association.