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Timothy O'Hearn, PE
Electrical Engineer

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PDHonline Course Provider Biography

Timothy L. OHearn graduated from Wichita State University in 1981 with a BSEE degree. He is a senior member of IEEE, technical author, past chairman of a local section of IEEE and is a member of the IEEE Industry Applications Society. He is a registered professional engineer in several states. He is experienced in the design of electrical distribution systems for large industrial facilities.

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Course No. Courses Provided by Timothy L. O'Hearn, PE PDH Units Current Price Buy Quiz
E106 Sizing Supply Conductors for Two-Speed Single Winding Induction Motors 2 $59 Buy Quiz
E121 Calculating Motor Start Time 3 $89 Buy Quiz
E163 Substation Design Guide 15 $349 Buy Quiz
E194 Power System Analysis 15 $349 Buy Quiz
E209 IEEE Red Book, Part 1 12 $299 Buy Quiz
E210 IEEE Red Book, Part 2 12 $299 Buy Quiz
E224 Grounding of Industrial and Commercial Power Systems 12 $299 Buy Quiz
E279 IEEE Recommended Practice for Powering and Grounding Electronic Equipment 15 $349 Buy Quiz
E289 National Electrical Safety Code 15 $349 Buy Quiz
E322 NFPA Standard for Purged and Pressurized Enclosures for Electrical Equipment 5 $129 Buy Quiz
E323 IEEE Standard for Standard General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers 5 $129 Buy Quiz
E324 IEEE Guide for the Application of Electric Motors in Class I, Division 2 Hazardous (Classified) Locations 5 $129 Buy Quiz
E327 IEEE Standard for Metal-Clad Switchgear 5 $129 Buy Quiz
E333 IEEE Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis 9 $219 Buy Quiz
E340 Form-wound Squirrel-Cage Induction Motors-500 Horsepower and Larger 5 $129 Buy Quiz
E362 Protection of Primary and Secondary Substation Transformers 5 $129 Buy Quiz
E363 Protection of Three Phase Integral Horsepower Motors 7 $169 Buy Quiz
E364 Ground-fault Protection 3 $89 Buy Quiz
E414 Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities as Class I, Division 1 and Division 2 12 $299 Buy Quiz
E453 IEEE Standard for Performance of Adjustable Speed AC Drives Rated 375 kW and Larger 7 $179 Buy Quiz
E461 IEEE Std C57.12.34 5 $129 Buy Quiz
E534 Standard for the Installation of Lightning Protection 8 $199 Buy Quiz
E561 Guide for the Interpretation of Gases Generated in Oil Immersed Transformers 3 $89 Buy Quiz
E607 IEEE Guide for Safety in AC Substation Grounding Part 1 8 $199 Buy Quiz
E614 IEEE Guide for Safety in AC Substation Grounding Part 2 8 $199 Buy Quiz
E636 NFPA 70E Electrical Safety in the Workplace 8 $199 Buy Quiz
E658 IEEE 1584-2018 Guide to Performing Arc-Flash Hazard Calculations 8 $199 Buy Quiz
E675 IEEE 515-2017 IEEE Standard for the Testing, Design, Installation, and Maintenance of Electrical Resistance Trace Heating for Industrial Applications 8 $199 Buy Quiz
E685 IEEE 551-2006 Recommended Practice for Calculating Short-Circuit Currents in Industrial and Commercial Power Systems 8 $199 Buy Quiz
E709 IEEE Std C57.12.10-2019 Requirements for Liquid-Immersed Power Transformers 8 $199 Buy Quiz
E753 CSA/ANSI C22.2 No. 273.19 Cablebus 8 $199 Buy Quiz
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