Recent content by dcollins

I don't know, I'd say that overall wrapping 10 poorly while others get 1 right is worse than that.

Do they dim significantly? A sudden power draw can easily cause a voltage drop, although that's usually on the order of a few volts - enough to notice a brief dimming, as though everything had gone down to 80-90%, it sounds like you're describing something more than that. Here's a quick...

Axial and radial in relation to the axis of the ellipsoid, which extends from the origin in the back to the opening in the front - the axis more accurately connects the two focal points, one of which is located at the lamp, the other is located near (I think just past?) the shutters/gobo slot...

I don't see any reason why they would have a problem with that as long as they're simple fuses and not something electronic. I do suspect that all those silly harmonics that I always hear about might have something to do with it though.

Definately use 12/3 cable, not 12/2.Also, I'm pretty sure, but not certain, that SJOOW is not good for theater. SOOW is the preferred, and SJOOW is a 'junior' version, if I had the choice I'd use SOOW exclusively. Other acceptable options are SO and SOW. There is also a temperature rating...

The following may no longer be true: Strobe lights used to use a capacitor, which is an electronic device that stores an electric charge. When the device is powered on, the capacitor begins charging up. At the beginning, there is actually no voltage across the lamp. As the capacitor charges...

Well then let me talk about some of the things that affect the size wire you might need!For one, the NEC differentiates between constant loads and temporary loads. Permanent loads are defined as any load that lasts for more than three hours - our lighting loads are considered permanent. Any...

I don't know any of the technical names for what we have, but we have a set of interlocking 20" by 20" panels, foam on the bottom, which interlock. It's easy to tear up, difficult to store (you don't want them stacked for too long or the ones on the bottom get crushed, and it takes either 4...

Please tell me that the DMX to the devices is over a separate data pair than power, that the data pair operates well below 120V, and that the power to the devices isn't really a full 120V? Most devices that use a power supply also step the voltage down and rectify it to DC, and with good reason.

So, my venue is in 'summer maintenance' mode. We have a total of one event between now and the end of august, so we're using this time to fix everything that we didn't have time to fix during the year. That's a little hard, what with our budget being frozen over the summer and all, but there's...

No.

You'll usually see them rated per phase, so 400A disconnect. You already know about not loading the disconnect to more than 80%, though. Yep Yep I'm not sure on the exact rule. 200% sounds like a good number, but consult an electrician for the actual rules and common practices. The NEC...

However his mathematics is correct. 96 channels*750W=72kW, 72kW/120V=600A and assuming correct load distributions, 200A per phase. However there's more to add, depending on why you're asking:If you're talking about an existing installation, you should plan to load each phase no more than 80%...

Ariel is the Disney princess. Aerial is a word meaning 'in the air'. (Arial is a mediocre but commonly-used sans-serif typeface.) </Pedant>

I would love to hear how wave-particle duality of light can possibly be applied to stage lighting...