Solar
Utility-Scale
Arc Flash Calculations and Insulation Resistance Testing
About this course
In this free lecture, Ryan Mayfield discusses two topics that are critical in the design and installation of large scale commercial installations: DC arc flash and insulation resistance testing.
The lecture includes discussions on the application of NFPA 70E in calculating DC arc faults and the associated hazard risk categories. Sample calculations are provided to illustrate real world examples and applications. The lecture also includes information on insulation resistance testing (IRT) during system commissioning and operations and maintenance activities. Participants will see an IRT procedure applied to help solidify the concepts presented in the lecture.
By the end of the lecture, participants will:
- Have an understanding of the arc flash calculations
- Recognize various hazard risk categories based on site specific conditions
- Be able to evaluate the results provided from insulation resistance testing of conductors
- Understand the basic setup procedure for insulation resistance testing
Course outline
2 modules
1 - 2 hours to complete
44 minutes
of video lectures
Module 1 • 6 assignments
Video Lecture and Conference Call Recording
Module 1 • 6 assignments
Video Lecture and Conference Call Recording
In this video lecture, Ryan Mayfield discusses two topics that are critical in the design and installation of large scale commercial installations: DC arc flash and insulation resistance testing. The lecture includes discussions on the application of NFPA 70E in calculating dc arc faults and the associated hazard risk categories. Sample calculations are provided to illustrate real world examples and applications. The lecture also includes information on insulation resistance testing (IRT) during system commissioning and operations and maintenance activities. Participants will see an IRT procedure applied to help solidify the concepts presented in the lecture. On the conference call recording, Ryan responds to participant questions and callers share their insights and perspectives.
- Lecture - Arc Flash and Insulation Resistance Testing (44:38 minutes)
- 1-hour conference call recording (.mp3) (.mp3)
- Resources: SP7.2 Arc Flash (.pdf)
- Resources: SP5.2 QA Standardizing Documentation (.pdf)
- Resources: Arc Flash whitepaper (.pdf)
- Free Tool: Mayfield Design Tool
Authors
Randy Batchelor
Principal and Owner, Sol Rebel
Randy Batchelor is a licensed Electrical Engineer in California and is a NABCEP Certified PV Professional. He has experience with projects ranging from small off-grid power systems to utility-scale plants connected at medium Voltage. Randy has been working in the solar industry since 2006 and has been involved in the design and construction of hundreds of PV systems,...
Ryan Mayfield
Founder & CEO, Mayfield Renewables
Ryan Mayfield has been working in the renewable energy field since 1999 and is the President of Mayfield Renewables (formerly Renewable Energy Associates), a consulting firm providing design, support and educational services for electrical contractors, architectural and engineering firms, manufacturers and government agencies. Ryan served as Photovoltaic Systems...
Frequently asked questions
Full FAQHow does this course work?
This is a free course. Enroll today and get access to all of the materials instantly. The lecture video and other materials are available any time.
How long do I have access to the materials?
For free courses there is no guarantee for how long the course materials will be available.
Is there a certificate of completion?
Certificates of completion are only provided to HeatSpring Membership subscribers. This course has not been approved by any credentialing organizations (NABCEP, AIA, USGBC etc) for Continuing Education Credits (CEUs). This course is for self education purposes only and completion does not indicate a level of professional expertise or credential.
Can I register multiple people?
Yes, this is a free course so you can share this page with other people from your group.
