ETL 1110-2-560
30 Jun 01
Table E-2
Failure Rate Data of Electrical Components from Reliability Analysis Center (1995)
Failure Rate
1
6
Component
per 10 Operating Hours
Arrester, Surge
2.6988
Cable (Summary)
1.1383
Above Ground (in conduit)
0.0300
Above Ground (no conduit)
0.4311
Aerial
0.6516
Below Ground (in duct)
0.5988
Below Ground (in conduit)
0.1876
Below Ground (direct buried)
2.5417
Capacitor Bank
4.5913
Circuit Breaker (Summary)
1.7856
Molded case
0.3574
Electric Motor (Summary)
9.2436
AC
6.8834
DC
14.4367
Fuse (Summary)
2.5012
Receptacle (Summary)
2.2727
Starter (Summary)
0.7636
Motor
0.0212
Switch, Disconnect (Summary)
4.5645
Switchgear (Summary)
0.5830
Bus (Summary)
0.5051
Bare
0.3890
Insulated
0.7925
Switch, Transfer (Summary)
6.3978
1
The summary data represent combined failure rate data merged from several different sources.
E-7
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