Reference Formulas Appendix
The National Electrical Code folks are increasing the technical data
contained in the code. But they still refuse to add formulas and tables which
would make electrical work easier to do. Further, they retain the desire that
the book remain NOT a manual for untrained persons. So very few aspects are
included in the book to help an electrical instructor train beginning
electricians.
So as a pragmatic blue collar worker and electrical instructor of over
thirty years, I have brought together in one booklet, all the formulas that I
wish were in the NEC. In addition, I have constructed tables which I feel belong
in the code. These tables are of my own invention and derivation. None of the
content has been submitted to the NFPA, nor has any of the detail been approved
by the NFPA. I simply have taken what they have included and amplified that
detail.
Partial
Overview
-calculator technique is spelled out step-by-step for substitution algebra
problem solving.
-conversion formulas typically needed are included.
-nipple fill tables not in the NEC are found here.
-household cooking load feeder demand tables are expanded so that time-consuming
calculations are unnecessary for most exam problems.
-ohms watts - series parallel circuit formulas are here.
-a single chart of how to determine wire size, breaker size, service feeder
value and neutral is developed.
-alternating current formulas are given in great abundance.
-constants used in voltage drop are calculated and listed.
-transformer formulas for single phase and three phase are complete.
-unusual words not found in the code index or other word indexes are given
alphabetically with reference.
Every page is punched for easy insertion in the looseleaf edition of the
2005 Edition of the NEC. To make reading easier, the pages are the same size,
same layout, and similar type style to the NEC. The look just like what is
included in the code. Finding answers is fast and easy.
This tool belongs in every NEC.
Click this button to order a copy of the 2005 NEC RFA and pay with any debit or credit card.
First Class Mail USPS
Click HERE
for the Order Form to order by check through the mail.
If you are an electrical engineer or design professional, may
I suggest that the information contained in my Reference Formulas Appendix 2005
can be used as a general approximation of the actual requirements but you need
to verify the contents of RFA through the means you typically use to make these
calculations.
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