PB 1.1-2007
Page 17
Section 10
MAINTENANCE
10.1 MAINTENANCE
PROGRAM
A maintenance program for panelboards should be conducted on a regularly scheduled basis in accordance
with the following:
10.2
PANELBOARD WHICH HAS BEEN CARRYING ITS REGULAR LOAD FOR AT LEAST 3
HOURS
A panelboard which has been carrying its regular load for at least 3 hours just prior to inspection should be
field tested by feeling the deadfront surfaces of circuit breakers, switches, interior trims, doors, and
enclosure sides with the palm of the hand. If the temperature of these surfaces does not permit you to
maintain contact for at least 3 seconds, this may be an indication of trouble and investigation is necessary.
Thermographic (infrared) scanning has become a useful method of investigating thermal performance.
WARNING—HAZARDOUS VOLTAGES IN ELECTRICAL EQUIPMENT CAN CAUSE SEVERE
PERSONAL INJURY OR DEATH. UNLESS OTHERWISE SPECIFIED, INSPECTION AND
MAINTENANCE SHOULD ONLY BE PERFORMED ON PANELBOARDS TO WHICH POWER HAS
BEEN TURNED OFF, DISCONNECTED AND ELECTRICALLY ISOLATED SO THAT NO ACCIDENTAL
CONTACT CAN BE MADE WITH ENERGIZED PARTS. FOLLOW ALL MANUFACTURER’S
WARNINGS AND INSTRUCTIONS.
Safety related work practices, as described in NFPA 70E, should be followed at all times.
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.
10.3
INSPECT PANELBOARD ONCE EACH YEAR
Inspect the panelboard once each year or after any severe short circuit.
10.4
ACCUMULATION OF DUST AND DIRT
If there is an accumulation of dust and dirt, clean out the panelboard by using a brush, vacuum cleaner, or
clean lint-free rags. Avoid blowing dust into circuit breakers or other components. Do not use a blower or
compressed air.
10.4.1
Visible Electrical Joints and Terminals
Carefully inspect all visible electrical joints and terminals in the bus and wiring system.
10.4.2
Conductors and Connections
Visually check all conductors
and connections to be certain that they are clean and secure. Loose and/or
contaminated connections increase electrical resistance which can cause overheating. Such overheating is
indicated by discoloration or flaking of insulation and/or metal parts. Pitting or melting of connecting surfaces
is a sign of arcing due to a loose or otherwise poor connection. Parts which show evidence of overheating
or looseness should be cleaned and re-torqued or replaced if damaged. Tighten bolts and nuts at bus joints
to manufacturer’s torque specifications.
© Copyright 2007 by the National Electrical Manufacturers Association.
Summary of Contents for Pow-R-Line SPX0361126
Page 2: ......
Page 4: ......
Page 6: ......
Page 7: ...TAB 1 Switchboards ...
Page 8: ......
Page 10: ......
Page 11: ...Instruction Data ...
Page 12: ......
Page 37: ...Component Data ...
Page 38: ......
Page 43: ......
Page 44: ......
Page 48: ......
Page 66: ...3 6 IM02601001E www eaton com Mechanical Installation ...
Page 114: ...14 IM02601001E www eaton com Using the I O Option Cards ...
Page 134: ...9 14 IM02601001E www eaton com Functions on the Web Server Pages Events Page ...
Page 156: ...10 22 IM02601001E www eaton com Setup on the Web Server Pages ...
Page 166: ...A 2 IM02601001E www eaton com Navigation Maps Main Menu Screens Sheet 1 ...
Page 167: ...www eaton com IM02601001E A 3 Navigation Maps Operating Mode Screens Sheet 2 ...
Page 168: ...A 4 IM02601001E www eaton com Navigation Maps Reset Mode Screens Sheet 3 ...
Page 169: ...www eaton com IM02601001E A 5 Navigation Maps Configuration Mode Screens Sheet ...
Page 170: ...A 6 IM02601001E www eaton com Navigation Maps ...
Page 172: ...B 2 IM02601001E www eaton com DIP Switch Description ...
Page 240: ...C 68 IM02601001E www eaton com Modbus Register Maps ...
Page 241: ......
Page 242: ......
Page 259: ...Shop Drawings ...
Page 260: ......
Page 262: ......
Page 264: ......
Page 266: ......
Page 268: ......
Page 270: ......
Page 272: ......
Page 274: ......
Page 275: ...Date PDF Generated 10 19 2012 Page 1 of 1 ...
Page 276: ......
Page 278: ......
Page 280: ......
Page 282: ......
Page 284: ......
Page 286: ......
Page 288: ......
Page 289: ...TAB 2 Panelboards ...
Page 290: ......
Page 292: ......
Page 293: ...Instruction Data ...
Page 294: ......
Page 296: ......
Page 325: ...Spare Parts ...
Page 326: ......
Page 371: ...Drawings ...
Page 372: ......
Page 374: ......
Page 376: ......
Page 378: ......
Page 380: ......
Page 382: ......
Page 384: ......
Page 386: ......
Page 387: ...TAB 3 Dry Type Transformers ...
Page 388: ......
Page 390: ......
Page 391: ...Instruction Data ...
Page 392: ......
Page 401: ...Drawings ...
Page 402: ......
Page 404: ......
Page 405: ...TAB 4 Molded Case Circuit Breakers ...
Page 406: ......
Page 408: ......
Page 409: ...Instruction Data ...
Page 410: ......
Page 417: ...TAB 5 Safety Switches ...
Page 418: ......
Page 420: ......
Page 421: ...Instruction Data ...
Page 422: ......
Page 424: ......
Page 452: ......
Page 453: ...Spare Parts ...
Page 454: ......
Page 467: ...Drawings ...
Page 468: ......
Page 470: ......
Page 471: ...Item 001 Cat DH261FGK ...
Page 472: ......
Page 474: ......
Page 475: ...Item 002 Cat DH261FGK ...
Page 476: ......
Page 478: ......
Page 479: ...Item 003 Cat DH261FGK ...
Page 480: ......
Page 482: ......
Page 483: ...Item 004 Cat DH261FGK ...
Page 484: ......
Page 486: ......
Page 487: ...Item 09 Cat DH364NRK ...
Page 488: ......
Page 490: ......
Page 491: ...Item 011 Cat DH324NGK ...
Page 492: ......
Page 494: ......
Page 495: ...Item 013 Cat DH362FRK ...
Page 496: ......
Page 498: ......
Page 499: ...Item 015 Cat DH321NRK ...
Page 500: ......
Page 502: ......
Page 503: ...Item 017 Cat DH362FRK ...
Page 504: ......
Page 506: ......
Page 507: ...Itm 019 Cat DH221NGK ...
Page 508: ......
Page 510: ......
Page 511: ...Item 021 Cat DH361UGK ...
Page 512: ......
Page 513: ...TAB 6 Enclosed Control NEMA ...
Page 514: ......
Page 516: ......
Page 517: ...Instruction Data ...
Page 518: ......
Page 550: ......
Page 551: ......
Page 552: ......
Page 561: ......
Page 562: ......
Page 578: ......
Page 579: ...Drawings ...
Page 580: ......
Page 582: ......
Page 584: ......