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Free Electrics Evaluation Quiz
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 New from APT!
Take this free Entertainment Electrics quiz to learn your strengths and weaknesses and find out if you're ready for industry certification. This quiz helps you find those areas in which you might need help and offers guidance along the way. Complete privacy means no one has to know the results but you.
Take the quiz now! |
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Entertainment Electrics Online 2013
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 Train on your own time, at your own pace, in the privacy of your home or office with APT Entertainment Electrics Online.
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PLASA Focus Austin Happy Hour and Backstage Tour
Start PLASA Focus Austin on the right note at the "Out of Focus Happy Hour and Backstage Tour" featuring live Austin music from the Jitterbug Vipers. The party starts the day before the start of PLASA Focus Austin on September 9, 2013 at 5:00PM at Austin's favorite live concert venue and home to the longest running music show in television history, "Austin City Limits." Get an intimate backstage tour of ACL Live at Moody Theater in the heart of downtown Austin, hosted by production manager Billy Heaslip and ACL lighting designer Walter Olden. The backstage tour is a limited opportunity, so reserve your spot now. Admission is free and the Jitterbug Vipers will perform from 5 to 7PM with a cash bar. All PLASA Focus Austin attendees and exhibitors are welcome.
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Ask Swami Candela
Dear Swami, I'm sure you've seen the formula for calculating voltage drop: VD = 2KIL/ACM, where VD is voltage drop, the constant K is something called the specific resistance of copper, I is current, L is the length of a run of copper wire, and ACM is the cross-sectional area of the copper wire in circular mils. What is meant by the "specific resistance of copper," and why is it sometimes given as the number 10.7, sometimes 11.1, and sometimes 12.9? What is the right number to use? Curious About Copper Dear Curious, Voltage drop is one of those universal truths that isn't affected by time or technology. Whether you're in Bombay or Boston, voltage drop will make a visit to your show. Welcome it and it will disappear in the darkness; ignore it and it will school you and humble you. The numbers you seek are the key to unlocking the nature of voltage drop. The specific resistance of copper is the resistance of a specific volume of copper. The reason that different numbers are used is because it varies with temperature. The number 12.9, for example, is what the National Electrical Code uses in its tables in Chapter 9. But it also specifies a temperature of 75˚ C (167˚ F). Other times the value 10.7 is used, and that's for a temperature of 20˚ C (68˚ F), or the value 11.1, which is for 32˚ C (90˚ F). But remember, when current flows through the copper it warms up, so those temperatures aren't necessarily the air temperature but the temperature of the copper wire. Do you have a question for Swami Candela? Click here to send an email.
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| "The two most important days in your life are the day you are born and the day you find out why."
- Mark Twain
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December 11, 12, & 13, 2013Location: Los Angeles area
1001 W Magnolia Blvd, Burbank, CA
"I would highly recommend this class." - Tim Donovan, IATSE Local 1, New York
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Coming Soon...Digital Networks Online
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On-site training, online training, books, DVDs, consulting, and more.
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 Don't miss PLASA Focus Austin at the Palmer Event Center in downtown Austin on September 10 & 11, 2013. Professional Development Program speakers include Mike Wood, Ola Melzig, Rich Davis, and more. |
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Lighting Console Training
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Nook's Punt Pages DVD
Self-help video tutorial for the live event production industry. Lighting designer and programmer Nook Schoenfeld takes you through the step-by-step process of setting up your lighting console for improvising playback to really shine on the set.
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Click here.
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