Erich,
Thank you for your response. I fully agree that self-modified dimmer packs, without proper instruction from the distributor and training of the individual doing the modification, is to be avoided. The concerns you listed are just part of what worried me about the solution we use.
Our case, in particular follows your concerns. Much of the documentation for the installed system was lost in the nearly 10 years when Clover Park High School did not have a theatre program. It is only with the advice and consultation of professional technicians that our solution has been implemented.
Perhaps I should have led with that. If Strand Century is contacted, they will refer you to another company who can provide the necessary constant power dimmer packs needed for LED lighting. According to the Strand Century representative, they no longer support the CD80 systems directly. There are multiple authorized third parties that support CD80 systems, so look for one in your area.
------------------------------
Jym Kinney
Troupe Director
Clover Park High School
Lakewood, Washington
------------------------------
Original Message:
Sent: 03-16-2017 15:22
From: Erich Friend
Subject: Dimmers for LED lighting
Using a Non-Dim module is the correct technical solution for temporary changes, as others have recommended. However, this leaves you with a 2P&G 'Stage Pin Plug' outlet or a NEMA L5-20 'Twistlock' outlet that 'looks like a dimmed outlet', but isn't. Unless you do a good job of documenting which circuits have Non-Dim modules installed, you can create a great level of confusion and head-scratching down the line.
Modifying the existing dimmer module(s) is NOT recommended. Although it seems innocuous enough, it opens a whole can of worms:
- Who assumes the warranty on the modified device? You do!
- Who assumes the liability should someone be electrocuted by the modified device? You do!
- Who assumes the liability for a fire caused by the modified device? You do!
- Does the person that comes into the venue five years from now have any records for the device modification(s)? Probably not! Will they continually wonder why "channel 53 doesn't dim!" ?
- Does your school administration authorize you to make electrical modifications to equipment? Probably not!
Chose the professional and safe path - don't make unauthorized modifications to electrical equipment or machinery. Always have changes to your systems thoroughly documented.
If you need constant ON power circuits and outlets, then have them added to your system by a licensed electrician that understands stage lighting systems. If you need outlets that can be remotely switched ON/OFF under DMX control, then have a system of commercially available equipment that is engineered specifically to do that installed - don't "make it up as you go". Note: There is a new special requirement in the NEC (NFPA 70 - National Electric Code) for remotely switched power receptacles that also must be incorporated in your solution.
"The road to hell is paved with good intentions. Good intentions count for little in the court of law."
------------------------------
Erich Friend
Theatre Consultant
Teqniqal Systems
------------------------------
Original Message:
Sent: 03-15-2017 07:57
From: Charles Puetzer
Subject: Dimmers for LED lighting
We have a strand dimmer rack with CD80 dimmers and a c21 control system. Does any know of a inexpensive way to change a few over to non dim power to run the LED lighting?
--
Charles PuetzerMath DepartmentStage ManagerMichigan City High School8466 W Pahs RoadMichigan City, IN 46360(219) 873-2044, ext. 4360cpuetzer03@mcas.k12.in.us