xbanone
Well-known member
I want (12) T8 light fixtures. Each with (2) 32w bulbs. Which would be 768 total watts. Using a 110 volts, I would draw 6.9 amps. So I could wire all the lights on one 15A or 20A breaker, right?
Please check my math (ohm's law)
- Thread starter xbanone
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hydramatic
Well-known member
750 watts is 1 horse power..15 would do it if it`s a designated circuit.
MrMark
Well-known member
That's brutal. It's actually not ohm's law, it's power = V * I and it's 120 volts, not 110.
if not ohms law what is it?
MrMark
Well-known member
Is this a purely resistive load?
I thought all the formulas in the circle were based on Ohms law, but whatever
Identaltech
Well-known member
^^^^^^Thats what they taught me in school but that was years ago must have something to do with that anolog to digital conversion
rockchucker
Well-known member
Check the Ballast for the Load. Then do your math.
Torque1st
MEMBER EMERITUS
Math? What is math???
that is my point.you are so right.
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MrMark
Well-known member
Not really. I have no idea what the "circle" is, but Ohm's law V=IR. The Power law is not ohm's law, especially in AC circuits. For purely resistive circuits, Ohm's law can be used to substitute resistance into the power law, thus : P=IR (I) = I^2 (R).
http://en.wikipedia.org/wiki/Ohm
http://en.wikipedia.org/wiki/Ohm's_law
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Torque1st
MEMBER EMERITUS
The circle:
http://www.google.com/images?hl=en&...tle&resnum=4&ved=0CDMQsAQwAw&biw=1146&bih=792
Most of us that work in the electrical fields have had various forms of that "circle" or "triangle" etc etc pounded into our head for ages. All of the equations are collectively referred to as Ohm's Law equations.
Please find something of importance to argue about.
http://www.google.com/images?hl=en&...tle&resnum=4&ved=0CDMQsAQwAw&biw=1146&bih=792
Most of us that work in the electrical fields have had various forms of that "circle" or "triangle" etc etc pounded into our head for ages. All of the equations are collectively referred to as Ohm's Law equations.
Please find something of importance to argue about.
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tfi racing
Well-known member
MrMark
Well-known member
MrMark
Well-known member
Torque1st
MEMBER EMERITUS
Just figuring that out?
Not so fast there Ohm Boy..........
Elroy actually had the pleasure of dealing with an idiot once who claimed that ohm's law was the equation that contained "ohms" and that the other equations were "watts law" and "Amps law"
Believe it. True story
The thing that is really "shocking" about it (no pun intended) is that *** wipe was the Engineering Manager for a major electrical equipment manufacturer.
Elroy told me this was a prime example of; it's not what you know, it's who you know. Rumor was, Einstein's daughter was doing the President of the company. :hitit:
Stuey
Well-known member
When I hear "Ohm's Law", I also only think of V=IR. You're right that it's not worth arguing about equation nomenclature, but it can cause confusion.
Never saw that equation circle before, I'll have to take a closer look later on, thanks!
Torque1st
MEMBER EMERITUS
I like to give people the benefit of the doubt, -for a while.
Elroy, It has always been who you know...
Use the ballast rating.
No more than 80% of the breaker rating.
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Torque1st
MEMBER EMERITUS
My Ugly's is a 93 version...
I think it will be OK tho.
I have some of those old circles and triangles from back in the 60's and 70's. Way back from B4 I could even spell Engineer.
Right now I have got to get something to eat. My sugar levels are hitting bottom.......................................
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