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FPE Stab-Lok CPSC Calibration Tests FPE Stab-Lok HAZARDS & REPAIRS WEBSITE SUMMARY OF the FPE Stab-Lok PROBLEM FPE HAZARD ARTICLES, STUDIES Summary of the FPE Stab-Lok Hazard How to Identify FPE Stab-Lok How to Repair FPE Stab-Lok FPE- Fires Waiting to Happen, Debate Waiting to End FPE Technical Report - Independent Research 2007 New Jersey FPE Class Action 2005 FPE St Louis Seminar 2004 Federal Pioneer Recall 1997 EXXON Buys a Scandal 1980 FPE HISTORIC DATES 1950-Present FPE Pre-1970 STAB-LOKS OK? FPE Stab-Lok TECHNICAL REPORT HOW TO IDENTIFY FPE & FP REPORTS OF FPE FAILURES HOW TO REPORT FPE INCIDENTS FPE REPAIR ELECTRICIANS FPE REPLACEMENT BREAKERS FPE REPLACEMENT PANELS FPE REPLACEMENT PANEL COSTS CAN'T AFFORD A NEW ELECTRIC PANEL? FEDERAL PIONEER in CANADA FPE Stab-lok: FIRES WAITING TO HAPPEN FPE HISTORY ADVICE TO HOME BUYERS w/ FPE PANELS HOME INSPECTION LANGUAGE for FPE Stab-Lok IAEI LETTER FPE Stab-Lok Hazard Summary Page for Public Use More Information Mobile ViewInspectAPedia Blog - News Updates AIR CONDITIONING & HEAT PUMPS BOOKSTORE ELECTRICAL ENERGY SAVINGS ENVIRONMENT EXTERIORS HEATING HOME INSPECTION INSULATION INTERIORS MOLD INSPECT/TEST PLUMBING ROOFING SEPTIC SYSTEMS SOLAR ENERGY STRUCTURE VENTILATION WATER SUPPLY ACCURACY & PRIVACY POLICIES CONTACT |
© Copyright 2010 InspectAPedia.com, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use page top links to major topics or use links at the left of each page to navigate within topics and documents at this website. Green links show where you are in a document series or at this website. FPE Stab-Lok Calibration Test Report - Failure Rate SummaryCPSC-C-81-1429 December 30, 1982 1.0 SUMMARYCalibration tests have been performed on 122 two-pole Federal Pacific Electric circuit breakers. The calibration tests were performed -in accordance with UL Standard 489 except for or a difference in the sequence of calibrations. UL 489 is the applicable standard that the breakers are presumed to meet. In most cases, the calibration tests were repeated after 500 off-on mechanical operations of the toggle handle.. The circuit breakers tested were supplied by CPSC and came from several sources. Most were provided to CPSC by Federal Pacific Electric, some were purchased new by CPSC staff members at retail outlets, and a few were removed from existing installations. The breaker ratings tested were 30 A (30 two-pole breakers tested), 40A (35), 50A(20), 60A(7) and 80A (30). The tests include performance at 100%, 135%, and 200% of ratings, and dielectric tests. A substantial number of breakers failed the calibrations testing, both before and after the mechanical toggle operations. Failures were evident with both poles carrying current as well as with one-pole operation. Specifically, the failures are summarized as follows:
The failures appeared. among breakers of all ratings, none were failure-free. Most of the "no-trip' conditions were sustained for four hours well beyond the UL specification. These were not marginal failures with respect to the failure criteria. The data suggests that, on the average, the mechanical operations result in increased failures. This was .'not strictly the case on a sample-to-sample basis. The failures relate to hazardous conditions in at least two ways. First, a fault in the wiring or utilization equipment which causes excessive- current-can result in fire if the circuit is not opened by the breaker -- this is its principal functional requirement. Secondly, it was determined in these tests that some of the breakers overheat to hazardous levels when subjected to overcurrent conditions (due to their own failure to trip) for sustained periods of time. The overheating can result in incapacitation of the breaker (i.e.: it will no longer open under any condition), and the temperature can be high enough to ignite fire in the vicinity of the breaker, as evidenced by charring of the case on some samples. NOTE: this text is quoted verbatim from pages 3-5 of "Calibration and Condition Tests of Molded Case Circuit Breakers, Final Report: Contract CPSC-C-81-1429 December 30, 1982," obtained from the US Consumer Product Safety Commission as a FOIA request. . ... Technical Reviewers & References
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