sound system problems

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Re: sound system problems #482432 04/17/11 06:18 AM
Joined: Feb 2005 Posts: 12,348 Likes: 4 New York hbiss Member
hbiss Member Joined: Feb 2005 Posts: 12,348 Likes: 4 New York	Huh, now you made me look at the manual and you are absolutely right, that is what it says but it's in the text of the instructions, not in the specs. Thing is though they have "Class 1 wiring must be used" printed next to the outputs and that's what everybody sees. Nothing about only with bridged mono. I suppose if it became an issue you could drag out the manual but according to the NEC it has to explicitly say that you can use CL2 (or CL3) wiring and I am not seeing that. The rule according to the NEC is that the wiring requirement must be printed on the unit and if it says nothing you have to assume Class 1. In this case Crown only says in the manual that you have to use Class 1 if you configure the amp in bridged mono where the outputs will be more than 100v. They don't say what the wiring requirement is for 70.7v. So because they say nothing we are back to Class 1 and that's what it says on the back panel so what's an inspector going to think even if you show him the manual? -Hal CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.

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Re: sound system problems #482433 04/19/11 02:35 AM
Joined: Dec 2007 Posts: 6,825 Likes: 22 Canby, Oregon Professor Shadow Retired Admin
Professor Shadow Retired Admin Joined: Dec 2007 Posts: 6,825 Likes: 22 Canby, Oregon	Like Hal said: "Article 640.9 (C)Output Wiring and Listing of Amplifiers. Amplifiers with output circuits carrying audio program signals shall be permitted to employ Class 1, Class 2, or Class 3 wiring where the amplifier is listed and marked for use with the specific class of wiring method." Dean Photographs: https://www.instagram.com/deanwilsoncanby/ https://fstoppers.com/profile/deanwilsoncanby https://www.facebook.com/Dean-Wilson-Photography-112841337020414 _________________________________________________________________________________________ Retired: That means I don't have a job description and I can do what I want.

Re: sound system problems #482434 04/19/11 04:41 AM
Joined: Dec 2005 Posts: 7,056 Fayetteville, NC Lightning horse RIP Moderator-Mitel, Panasonic
Lightning horse RIP Moderator-Mitel, Panasonic Joined: Dec 2005 Posts: 7,056 Fayetteville, NC	So Jeff, time to buy a sheet of rub-on alphabet! When I was young, I was Liberal. As I aged and wised up, I became Conservative. Now that I'm old, I have settled on Curmudgeon.