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National Electrical Contractors Association (NECA)

Improve professionalism and accuracy for electrical construction

The National Electrical Contractors Association (NECA) creates performance standards that are published as National Electrical Installation Standards (NEIS). These voluntary codes are ANSI-approved and dictate the performance and workmanship standards essential for different types of electrical construction. NECA standards empower you to:

  • Reduce time spent writing specifications
  • Employ workmanship control
  • Maximize excellence and quality

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Standards access or budget management, organization-wideLess than 5 employees use standards
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I have encountered a question which is kind of different and strange to me,it says, Find the equations of the planes through (2,-1,3) and contains (x-2)/3 = (y-1)/2 = (1-z)/4 and -x/2 =3-y = (z-3)/2 Now,what is confusing me is those two equations,I really don't know where to start.I need help her

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