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WO 409.01 Math and Code for Small Wind

Course Description:

Participants in this course will learn to effectively reference and use the National Electrical Code (NEC) with regard to the installation of small wind energy systems, and to properly size conductors, overcurrent protection, and associated equipment for grid interactive and battery-based systems. Many of the calculations and processes in this course align with the Job Task Analysis for the NABCEP Small Wind Installer Certification.

Course Objectives:

Upon completion of this course, participants will be able to:

  • Clarify the purpose, scope, and layout of the NEC
  • Gather resources for additional information and practice
  • Review key "general" rules in NEC Chapters 1-4 and how they apply to small wind installations
  • Calculate conductor ampacity, correct conductor ampacity for temperature change and rooftop installations, adjust conductor ampacity for multiple conductors in a raceway, and calculate ampacity of cords and cables
  • List conductive and resistive properties of materials and circuits
  • Calculate voltage drop in electric circuits, determine appropriate conductor size for circuits that are affected by voltage drop, and alter voltage drop calculations for temperature changes
  • Navigate Chapter 9 Tables for conductor and raceway dimensions and calculate maximum number of conductors that are permitted in a given raceway
  • Caculate the minimum volume required in pull and junction boxes and select minimum size of pull and junction boxes required for given installation scenarios
  • Select appropriate overcurrent protection for a given circuit
  • Examine grounding requirements for small wind systems, identify means of establishing an effective grounding electrode system, select proper size of grounded (service) conductors and Main Bonding Jumpers, identify means of bonding to other grounded systems on the premises, and select proper size of equipment grounding conductors
  • Assess interconnection requirements, documents, and procedures
  • Compare and contrast listing and certification bodies, commissions, councils, and their labels
  • Review requirements in Article 705 for grid-connected energy systems
  • Compute busbar loading in load centers for interconnected systems and differentiate utility interactive inverters and interconnection relays for controllers
  • Explore (new) requirements for small wind energy systems in Article 694
  • Examine safe and proper braking/shut-down sequences and systems for small wind turbines
  • Compare and contrast grid interactive and stand-alone systems
  • Analyze requirements for battery-based systems, review battery safety and best practices, calculate values of voltage and current in series/parallel battery circuits, and draw connection points of given battery systems to achieve desired voltage/current

Course Instructors:

Jenny Heinzen, MREA



Continuing Education Units

  • 16.0 credit hours for WI Beginner Electrician Registration
  • 16.0 credit hours for WI Commercial Electrical Inspector Certification
  • 16.0 credit hours for WI Industrial Journeyman Electrician License
  • 16.0 credit hours for WI Journeyman and Master Electrician License
  • 16.0 credit hours for WI Residential Journeyman and Master Electrician License
  • 16.0 credit hours for WI UDC-Electrical Inspector Certification

Required Materials:

  • A computer
  • A phone
  • Basic computer skills
  • Computer browser such as Firefox or Safari (not Internet Explorer) with pop-ups enabled for the course
  • Adobe reader
  • Calculator
  • Text, National Electric Code 2011

Being an Individual Membership gets you $20 off of each course. Not a member, but want to be? Simply go to the membership page to become one.

September 3rd, 2013 12:00 AM   through   October 13th, 2013 5:00 PM
Phone: 715-592-6595
Non-Member Price $ 320.00
Member Price $ 300.00

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