70 Volt Speakers
- Thread starter brennan
- Start date
- Status
- Location
- Massachusetts
brennan said:
Not if the amplifiers output is labeled 'Class 2' as most but not all are.
ClearCom
Member
- Location
- Branchburg, NJ
It all depends on the local inspector.
We do a lot of 70v systems and the speakers we use are from Bogen. Bogen sells both backed and non-backed speakers.
The speaker with the backing (box) produce much better sound and we use them in restaurants. The non-backed speakers are used for hospitals and those installs that do not require great sound reproduction and are used primarily as background music.
Some municipalities require that the speaker be boxed using sheetrock above the ceiling.
We do a lot of 70v systems and the speakers we use are from Bogen. Bogen sells both backed and non-backed speakers.
The speaker with the backing (box) produce much better sound and we use them in restaurants. The non-backed speakers are used for hospitals and those installs that do not require great sound reproduction and are used primarily as background music.
Some municipalities require that the speaker be boxed using sheetrock above the ceiling.
- Location
- Massachusetts
ClearCom said:
It should not, the NEC is clear, class 2 and 5 circuits do not required raceways.
That would be a fire code. :smile:
ClearCom
Member
- Location
- Branchburg, NJ
I understand that he NEC is clear, but many an inspector are not.
We do what the NEC dictates, but some inspectors need to be shown where in the book its listed.
We have dealt with two inspectors in the same town that have different ideas on what to do.
They basically look to make sure nothing is on the grid and they leave.
We do have a good reputation for not cutting corners, so that might be why they leave us alone.
We use the right wire, hang it correctly, secure where it needs to be, and make sure nothing is touching the grid or the supports.
We do what the NEC dictates, but some inspectors need to be shown where in the book its listed.
We have dealt with two inspectors in the same town that have different ideas on what to do.
They basically look to make sure nothing is on the grid and they leave.
We do have a good reputation for not cutting corners, so that might be why they leave us alone.
We use the right wire, hang it correctly, secure where it needs to be, and make sure nothing is touching the grid or the supports.
mdshunk
Senior Member
- Location
- Right here.
I'm contemplating using the Bogen speakers that are already 2 feet square with built-in back box, rather than the regular seperate speaker, grille, tile bridge, and back box when I have the choice. The one's that are already 2 feet square have a dial you turn on the topside to select the max wattage of the speaker. No trying to decypher 10 different wire colors above a dark ceiling. The upcharge for the lay-in speaker is enough to offset the labor savings, the way I figure.
ClearCom
Member
- Location
- Branchburg, NJ
They also have a version with a built in volume control for those area that need more tailoring.
They are great drop in units that weigh less than 3 pounds.
No more drilling holes in speaker tile and the need to use a back brace.
The inspectors like them also.
They are great drop in units that weigh less than 3 pounds.
No more drilling holes in speaker tile and the need to use a back brace.
The inspectors like them also.
- Location
- Massachusetts
brennan said:
That changes everything, yes fire alarm speaker wiring may well have to be in conduit.
mdshunk
Senior Member
- Location
- Right here.
What are you guys calling a fire alarm speaker? Voice evac?iwire said:
edit- nevermind.
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