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Power factor correction capacitor bank maintenance checklists

Power factor correction capacitor bank maintenance checklists for the quarterly and annual rounds: 2 free lists, 30 items and 27 photo requirements, each item naming what to look for and the photo evidence it needs. Work is commonly verified against NEC (NFPA 70) and NFPA 70B; the edition in force is the AHJ's call on each project.

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The power factor correction capacitor bank rounds

Power factor correction capacitor bank QuarterlyPower factor correction capacitor bank quarterly maintenance checklistCan condition, fuse indicators, stage switching and controller reading checked energized15 items12 photosPower factor correction capacitor bank AnnualPower factor correction capacitor bank annual maintenance checklistDe-energized inspection after full discharge, done during the outage alongside the NETA testing tech15 items15 photos

Where each walk sits in the schedule

  1. 01quarterly

    Power factor correction capacitor bank quarterly maintenance checklist

    Every quarter, timed against a loaded part of the day so the controller is actually calling stages in and the power factor reading means something.

    Run by: The facility electrician on the quarterly round, reading the bank energized through the door or viewing window.

  2. 02annual

    Power factor correction capacitor bank annual maintenance checklist

    Once a year during a scheduled shutdown, coordinated with the NETA technician so the bank is locked out, the discharge resistors are given their full time to bleed the cans down, and it's inspected and tested before returning to service.

    Run by: The facility electrician recording the inspection during a planned outage, inspecting cans and connections after discharge while the testing firm performs the electrical tests.

What most often fails on a power factor correction capacitor bank

  • A bulging or seeping can noticed but written off as 'always looked like that', so a failing capacitor is left switching in and out.
  • The controller reading a healthy power factor while a whole stage's contactor has stopped pulling in, and no one cross-checks the amps.
  • A blown capacitor fuse whose indicator has popped, missed because the door stays shut and the indicators are never read.
  • Work started on the bank before the discharge resistors have had their full time to bleed the stored charge, leaving live cans behind an open disconnect.
  • A capacitor that already reads low on the testing tech's meter left in service because it 'still switches', so the bank quietly loses correction.
  • Reactor and connection torque checked but the discharge resistors themselves never inspected, so a failed resistor leaves the next crew a charged can.

Verified against

Families only, never clause numbers. Adoption varies by jurisdiction; confirm the edition your authority having jurisdiction enforces before you run a walk against it.

Common questions

5 answers

Which power factor correction capacitor bank maintenance rounds do these checklists cover?
Power factor correction capacitor bank quarterly maintenance checklist (quarterly): Every quarter, timed against a loaded part of the day so the controller is actually calling stages in and the power factor reading means something. Power factor correction capacitor bank annual maintenance checklist (annual): Once a year during a scheduled shutdown, coordinated with the NETA technician so the bank is locked out, the discharge resistors are given their full time to bleed the cans down, and it's inspected and tested before returning to service.
Who runs the power factor correction capacitor bank maintenance round?
The facility electrician on the quarterly round, reading the bank energized through the door or viewing window. The facility electrician recording the inspection during a planned outage, inspecting cans and connections after discharge while the testing firm performs the electrical tests.
What most often fails on a power factor correction capacitor bank?
A bulging or seeping can noticed but written off as 'always looked like that', so a failing capacitor is left switching in and out. The controller reading a healthy power factor while a whole stage's contactor has stopped pulling in, and no one cross-checks the amps. A blown capacitor fuse whose indicator has popped, missed because the door stays shut and the indicators are never read. Work started on the bank before the discharge resistors have had their full time to bleed the stored charge, leaving live cans behind an open disconnect.
Which standards is power factor correction capacitor bank work verified against?
NEC (NFPA 70), published by the National Fire Protection Association; NFPA 70B, published by the National Fire Protection Association. Adoption varies by jurisdiction. Confirm the edition your authority having jurisdiction enforces before you run a walk against it.
Can I run these checklists in RTI?
Yes. Start a free RTI workspace and load any of the 2 lists (30 items in total). The Photo Gate holds the submit button until every mandatory item is answered and its photos are attached, and approved inspections roll into a branded turnover package with a tamper evident audit trail.

Run these lists with the Photo Gate.

Tag one area, scan it, and the submit stays locked until the photos exist.

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