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Joined: Oct 2000
Posts: 2,749
Member
Here's an NFPA dwelling unit calculator:
http://www.nfpa.org/nec/Resources/Calculators/dwelling.asp

What others have you discovered, and which ones are the easiest and most accurate to use?


Joe Tedesco, NEC Consultant
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Joined: Aug 2002
Posts: 1,081
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http://www.electrician.com offers the following under "Calculators:"

  • Raceway Fill Calculators
  • Standard OCPD Sect. 240.6 Calculator
  • Table 250.66 Calculator
  • Table 250.122 Calculator
  • Excel 7.0+ Table 310.16
  • How to Determine Cable Tension with a Sheave and Scale
  • Cable Tray Pulling Tension Calculator with examples
  • Wire Pull Calculator with references
  • Excel 7.0 Neher-McGrath Calculator for Power Conductors and Thermal Derating
  • Multi-purpose Electrical Calculator
  • Voltage Drop Calculator
  • Standard Calculator


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