Recent content by MPTESE

  1. M

    Confirm Wiring and LED Driver Compatibility?

    I'm not familiar with your inrush current calculations. I see that's a nema thing (US), but confused why there's 230v in your calculation. If it wasn't implied, the AC side is all 120v.. But I dont' know enough about that. I'm probably just sounding ignorant. If that doesn't change things, I...
  2. M

    Confirm Wiring and LED Driver Compatibility?

    Thank you sir. My application is to build a mobile light for filmmaking/video production. This is not a permanent installation at the top of a high-bay warehouse, etc. For somewhat of a visual reference, see the image below. Although, mine won't be in an enclosed metal housing, rather a frame...
  3. M

    Confirm Wiring and LED Driver Compatibility?

    Thanks for the reply. The comfortable current of the COB is 5A, and at 55v that would be 275 watts. How can I keep it close to this range as its max? The default current of the driver is 5.6AMPS. How do I play with the relationship between the voltage and current? The driver has a built in pot...
  4. M

    Confirm Wiring and LED Driver Compatibility?

    Hello, I desire to power (4) 300W LED COBs simultaneously via a single 120v AC plug. Each COB has their own 300W driver. The driver is AC input and DC output. It is a constant current driver. Here's the spec sheet of the driver. I assume I would be using the H-AB, which provides a DC voltage...
  5. M

    Hello from US - NC

    Hello, My name is Joe and I'm originally from LI, NY - but now reside in NC. My interest in understanding electricity sparked from working with cinematography lights, where it is required to have a basic understanding of loads, current, etc - especially when working with generators. I am still...
  6. M

    What's your definition of 'ghost voltage' ?

    This may or may not be related or useful context for your question. In the film industry, there's a common term called "Ghost load". It's often used when dimming lighting fixtures with traditional dimmer packs. Sometimes the dimmer pack requires a minimum load to operate effectively and...
  7. M

    Step Down Transformer from Receptacle - Expected Results?

    Lucien, you assumptions and answer was exactly what I wanted to confirm. Thank you again for your detailed response. To others who may be wondering, it could be advantageous for me to have a single load that exceeds 50amps at 120. In my scenarios it is for the purpose of cinematography, and...
  8. M

    Step Down Transformer from Receptacle - Expected Results?

    Lucien, Thanks so much. Can you recommend any visual learning material to understand the theory behind calculating the 87A?
  9. M

    Step Down Transformer from Receptacle - Expected Results?

    Hello, I have a 125/250v - 50amp twistlock receptacle in a 3phase building (so, 208v between hots). It's a 4-wire receptacle. Currently, when needed, I split the phases/hots to attain two lines of 120v, each capable of 50amp current. If I installed a knock down transformer (208->120) into the...
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