Hi Charlie, I was reading some posts you made from years ago and you referenced some formulas that you email or direct message people but I couldn't figure out how to DM or direct message you. Anyways, I'm having trouble calculating the load on each phase of a 120/208 panelboard with a variety of load types (120v line to neutral, 208 v single phase, 208v 3 phase). Can you point me to a formula to help me figure out the current on each phase of the feeder?
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1.73 Power calc. confusion
- Thread starter CESllcTN
- Start date
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
It's not that the red and yellow wavelengths "pass". The blue LED creates only blue wavelengths. The job of the phosphor is to absorb some/most of that blue wavelength light, and re-emit light in the yellow or red wavelengths. Adding those wavelengths to the blue wavelengths gives an overall spectrum humans perceive as white. So if the phosphor delaminates and falls off, you just get the straight blue light from the LED.Blue LEDs with the phosphor layer around the lights is disintegrating. The phosphor absorbs the blue wavelength leaving red and yellow wavelengths to pass creating a white light.
Cheers, Wayne
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
This thread may be helpful, and would be a good place to follow up with any questions about such a calculation:Anyways, I'm having trouble calculating the load on each phase of a 120/208 panelboard with a variety of load types (120v line to neutral, 208 v single phase, 208v 3 phase). Can you point me to a formula to help me figure out the current on each phase of the feeder?
208Y/120V PANEL SCHEDULE KVA PER PHASE CALCULATION
Hello, I am an MEP electrical designer. For years I have always thought that if you have a 208V single phase load fed from a 208Y/120V panel, meaning there is a 2 pole breaker, and you want to know the per phase kVA to input into a panel schedule, you simply take the voltage (208v) and multiply...
forums.mikeholt.com
Cheers, Wayne
Thank youThis thread may be helpful, and would be a good place to follow up with any questions about such a calculation:
208Y/120V PANEL SCHEDULE KVA PER PHASE CALCULATION
Hello, I am an MEP electrical designer. For years I have always thought that if you have a 208V single phase load fed from a 208Y/120V panel, meaning there is a 2 pole breaker, and you want to know the per phase kVA to input into a panel schedule, you simply take the voltage (208v) and multiply...forums.mikeholt.com
Cheers, Wayne