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UL’s Transition from UL 508C to UL 61800-5-1


UL 61800-5-1 was published in June of 2012 and on February 1st, 2016, new designs for adjustable speed electrical power drive systems must be investigated to UL 61800-5-1 to obtain a UL listing. There are several significant changes from UL 508C that have the potential to impact compliance for certain designs.  This one-day workshop is designed to help product designers and regulatory compliance engineers navigate the changes specific to the safety requirements for electrical, thermal and energy.

Each participant will receive a copy of the UL 61800-5-1 Standard for Adjustable Speed Electrical Power Drive Systems - Part 5-1: Safety Requirements - Electrical, Thermal and Energy ($476 USD value).


Course Topics

  • History and development of UL 61800-5-1
  • General information on UL 61800-5-1
  • Insulation coordination requirements
    • Solid insulation
    • Clearances and creepages
  • Enclosure and bonding requirements
  • Performance (test) requirements
  • Component requirements
  • Transition of products from UL 508C to UL 61800-5-1


  • Explain why and how UL 61800-5-1 was developed
  • Review the scope of UL 61800-5-1
  • Describe the layout of UL 61800-5-1 in relation to UL 508C
  • Explain in detail the significant differences in technical requirements between UL 508C, UL 61800-5-1 and IEC 61800-5-1
  • Describe UL’s plan for transitioning currently certified products from UL 508C to UL 61800-5-1

Learning objectives will be measured by:
  • Discussion and activity

Continuing Education Units (CEUs)

Contact your local jurisdiction for CEU recognition.

Target Audience

  • Drive product designers and engineers
  • Regulatory compliance engineers

Continuing Education Units (CEUs)

  • 0.7 IACET CEUs; contact your local jurisdiction for CEU recognition.
Click here for terms and conditions...


Time Requirement


Instructor-Led 1 day $775.00

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