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KIMBERLY NEWSOME

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I HAVE BEEN DOING ELECTRICAL WORK ALL MY LIFE AND AM GOOD WITH MATH BUT I HAVE A HARD TIME CALCULATING FORMULAS. SUCH AS WHAT IS THE LOAD REQUIREMENT FOR AND OUTDOOR SIGN RATED 1300 VAs?
HOW CAN IT BE VOLTAGE AMPS WHEN E=VOLTS AND I=APMS.
THIS GETS CONFUSING. I'VE WENT THOUGH MY CODE BOOK ON CALCULATIONS AND AM CONFUSED. I KNOW IT HAS TO BE SIMPLIER THAN THIS.
 
Welcome to the forum! :smile:

(Using all caps suggests shouting.)

Volt-amps are, as are watts, equal to volts x amps, simply speaking. Divide the volt-amps by the voltage, and you get amps:

If 120v: 1300/120 = 10.833a

If 208v: 1300/208v = 6.25a

If 240v: 1300/240 = 5.416a

It doesn't get any simpler. (There is a difference between VA and watts, but the difference isn't relevant to this discussion.)
 
I find it easiest to use the ladder method to do my math......I could never remember the Ohm's law way....

For Reference......

W.....watt
E......volts
I.......amps
R.......resistance

For single phase:
Mulitply going up and divide going down.........IE.....RxI=E.....IxE=W

W= E/I........E= W/I

For Three Phase it's the same but you have to factor in the square root of 3

W= E/I(1.73)

I hope I explained that right
It's always been eaiser for me to figuire out calculations this way.
 
Edit to a theme!

Edit to a theme!

W ......... - Power
Amps....... I
Volts....... E
ohm ....... R

Dude, the only thought for the Summer, I'll leave you with, is that if you
go to the beach that you'll see a pier and some Wavo's ....

:)
 
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