Recent content by RCadena

I'm curious if this issue was resolved and how. I would suggest testing for continuity between pin 1 of the DMX cable and the chassis of the shoebox dimmers. It should not have continuity but that was not spelled out in the original DMX512 protocol, so some manufacturers connected them. If there...

Steve, You're confusing the list of equipment with the correct answers. The correct answers do not include transformers or motors. Yes, I did include LEDs because, in my experience, about half of the LED fixtures I've tested have high harmonic content. You work for a manufacturer that happens to...

Hi Steve,The question say it's portable feeder cables.

The idea behind this question was to point out that you can use a category IV meter for category III, category II, or category I work, but not the other way round.

What's the resistance of a dead short? It's pretty close to 0 ohms. But now we're splitting hairs. Thanks for the feedback!

Sorry about the wonkiness - I don't know why it would thank you for completing the quiz halfway through. This is new software and I'm still trying to figure it out. As far as the categories of meters, I don't know what you mean by "real" transmission circuits, but there is no category higher...

John, you're right and so it the answer in the quiz. The correct answer is that the illuminance increases by a factor of four, because, as you correctly point out, the illuminance is related to the square of the radius. When you have the throw distance, you half the radius, which decreases the...

This is why I created this quiz. A distorted current waveform produces harmonics that cause current to flow in the neutral conductor of a balanced 3-phase system. The current is not caused by an imbalance, it's caused by harmonics. Here's a picture from my Fluke 43B power quality meter of the...

Hi David, I'm not sure which part is absurd. Nor am I sure how super conductors are involved. Can you please clarify?

Thanks for sharing this!