Formulas in the NEC Code Book

[roger]

Dlhoule, I agree whole heartedly with your post.

I'm with the group who don't think formulas belong in the NEC.

Roger

 

[PlnOldRick]

you mean none of you guys knew they do make one with the ohms law wheel and voltage drop calc's etc??? its sold as a piece together kit, thats probably why.

search for these parts to make your book
1. code book
2. ugly's book
3. duct tape

instructions in case you've lost yours.
1. press rear page of ugly's book firmly against front or rear cover of code book.
2. apply tape to adhere ugly book to code book
3. use


in all honesty..... how hard is it to just carry an ugly's book? in my truck i carry a 99,02,05 code book, an 05 handbook, a couple of holts books, an njatc signifigant changes to 05 book and an ugly's book. besides your not a real man if you dont have an ungodly faded ugly's book blocking the defroster vent in your van or truck.

and yes i know that was a hellafied run on sentence.

 

[Shockedby277v]

Perhaps I could be mistaken in that statement Dhoule. Master would be the wrong term... but nonetheless it was more pertaining to having formulas more readily available for less educated journeyman in the field.
Flame me all you will but quite frankly, it only makes sense.

Regardless if it makes the test easier, maybe what should be done is make it mandatory to take the exam every 4 yrs to validate every journeyman/masters still have the formulas memorized. In either case, the only thing that would result for a safer work enviroment would be the electrical end of it.

Not flaming just defending my statement.

 

[ramsy]

Remember three formulas.
I=E/R, P=I*E
for 3 phase
I=(E/SQR(3))/R

Can someone help me with this? I thought phase & line current was the same for a 3 phase wye, but for Delta's phase current must be vectored I*Sqrt(3) to get line-to-line current?

What is the practical application or when do we user I=(E/Sqrt(3)/R)?

 

[charlie b]

Good question, Ramsey. My answer is that the square root of three is going to come into play one way or another. In a Delta, the line current is higher than the phase current by that factor. But the phase voltage and the line to line voltage are the same. In a Wye, the line to line voltage is higher than the phase voltage by that factor, but the phase current and the line current are the same. The factor will be associated with the Amps or with the Volts, but it will be one or the other. So the formula works the same in either case.

 

[George Stolz]

in all honesty..... how hard is it to just carry an ugly's book?

into a test...impossible.

make it hard to find if you want, half the time i can't find table 8 on the third pass. :shock:

imo.

i respect the opposing view.

don't drink + type,

 

[ramsy]

Good question, ..the formula works the same in either case.

Many thanks, Charlie.

 

[dlhoule]

half the time i can't find table 8 on the third pass.

George, is that on the 3rd pass of the bottle? :twisted:

I sometimes can't find my code book after the 3rd pass.