# The Ultimate Mechanical and Electrical Thread!

Discussion in 'General Science & Technology' started by Thoreau, Nov 19, 2008.

Not open for further replies.
1. ### catoless hate, more scienceRegistered Senior Member

Messages:
2,959
here is a question:

if I wanted to make an LED lighting ballast, and sell it commercially, what types of certification would I need? UL?

I guess that does not have to do with electromechanics, but I think it would be good to know $_$

3. ### leopoldValued Senior Member

Messages:
17,455
you, yourself won't need any kind of endorsement, the product will most probably need to be national electrical code compliant.
good plug for an electronics forum though.

5. ### catoless hate, more scienceRegistered Senior Member

Messages:
2,959
how does one go about getting something NEC certified?

7. ### leopoldValued Senior Member

Messages:
17,455
the NEC doesn't certify anything.
it's a code that must be followed when installing or upgrading electrical equipment.

if your device runs on batteries then it poses no real danger and probably won't need any kind of certification.

i don't really know who to contact other than UL.
i do know that the device must comply with the NEC and the NEC doesn't certify anything.

8. ### MetaKronRegistered Senior Member

Messages:
5,502
In the United States there is an Underwriters Laboratory certification. If you were talking about fluorescent lamp ballasts these have been so much trouble in the past that they would have to be made by very strict standards. Modern versions are built extremely tough and impossible to open to work on. You simply do not repair a fluorescent lamp ballast. They have started too many fires.

If you're talking about regulating power to light an LED using house current, certification will still be tough and expensive. If you're building it for your own use you don't have to go through that.

9. ### OilIsMasteryBannedBanned

Messages:
3,288
IEEE Spectrum is good: http://www.spectrum.ieee.org/

E.g.: http://www.spectrum.ieee.org/dec05/2367

"Freund's (2003) experimental work confirms the infrared radiation emission nature of such geodynamic anomalies and processes. It is therefore logical that Earth's geodynamics are driven by electro-motive force (EMF), or rather, electromagnetic anisotropic concentration processes, and surely not by the conventional physically inadequate heat-engine bulk convection formalism. In other words, volts and amperes control tectonism and all geodynamic phenomena...." -- Stavros T. Tassos (seismologist) and David J. Ford (geologist), 2005

Freund, F.T., Rocks That Crackle and Sparkle and Glow: Strange Pre-Earthquake Phenomena, Journal of Scientific Exploration, Volume 17, Number 1, Pages 37-71, 2003

Tassos, S.T., and Ford, D.J., An Integrated Alternative Conceptual Framework to Heat Engine Earth, Plate Tectonics, and Elastic Rebound, Journal of Scientific Exploration, Volume 19, Number 1, Pages 43-90, 2005

10. ### plakhapateBannedBanned

Messages:
249
W= VA Cos (phi)
where W= Watt, V=Voltage, A=Current, Phi is an angle between voltage and current vectors
When phi = 0 i.e. when angle between voltage and current is zero, Cos(phi) = 1.
Them W= VA

P.J.LAKHAPATE
plakhapate@gmail.com

Last edited: Nov 25, 2008