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This topic comprises 2 pages: 1 2
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Author
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Topic: Replacing the white power switch on NEC NC2000
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 03-22-2014 10:47 AM
We've told all of our customers to NEVER use that white switch. While our current mode is to have projectors go to standby at night (those that have a standby mode like NEC or Christie or even the Barco 10s), we are thinking of killing power to the projectors...particularly the NEC since it runs one fan all night (FAN 6, the AC power fan). I don't believe there is any benefit to leaving it on since it gets from power to standby in less than 15-seconds (Christie is notably longer since it has to boot up Windows).
In screening rooms, there may be months between uses of the projector. I've had two LVPS die in the "off" time when nobody was using the room...only to find a dead projector when they needed the room.
I've always been in favor of using common things like breakers, light switches...etc to do this sort of switching. When on uses the power switch of a device...the duty cycle of that switch is often an unknown...it will fail, eventually. When it fails, the cost of the part and the time it takes to obtain, change is ALWAYS going to be higher than using a common-use item.
When electricians have commented about using breakers since most (particularly low-bid) are not "switch rated" I return with: - We are never switching the rated load of the breaker and often just a small amount
- The replacement breaker is cheaper and more available than the specialty switch
- The cost of changing the breaker is cheaper than the specialty switch
I mean really, how long does a breaker last, particularly good ones like Square-D QO series with a daily use cycle? 10-years? What do they cost at the nearest home-center or even electrical supply house? $10 or less? Compare that to changing a specialty switch. Note, the NC900C leaves full fans on 24-hours so it is even more of an issue for that one.
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