Hoods

[Hendrix]

NFPA 96 speaks of hoods but does it say that all circuits (including luminairs) must open when the ansel system is activated? I Know that the fan must stay on but what about the lights.

 

[Ken In NJ]

I have done LOTS of hoods .. and always included the hood lights in with the shut down circuits under the hood .. I am sure that they must go off as well as the make-up air and any equipment under the hood

 

[Hendrix]

I have done LOTS of hoods .. and always included the hood lights in with the shut down circuits under the hood .. I am sure that they must go off as well as the make-up air and any equipment under the hood

The ansel box comes ready with attached loads, and the hood lights were not on a shut down circuit. The EC dosen't want to void the listing :-?:-?

 

[Ken In NJ]

The ansel box comes ready with attached loads, and the hood lights were not on a shut down circuit. The EC dosen't want to void the listing :-?:-?

Captive Air Hood ?

Not sure if its the correct thing to do .. BUT we always tied the few hood lights into the 120 volt make-up air circuit ..and have never had an issue

 

[renosteinke]

It's not enough for you to only know the NEC!

There are different standards that address kitchen exhaust hoods. READ them. Much of what you 'know' is either incomplete or incorrect.

In general, EVERY source of ignition under the footprint of the hood needs to be shut down. This includes lights, receptacles, and gas lines. If a standing pilot light is used, you will need an additional device to keep the gas 'off' when your contactor is reset. You're not REQUIRED to keep the exhaust fan on, but the fan providing fresh air DIRECT to the hood must be shut off (though general practice kills the room air supply anyway).

There are also alarm provisions. If there is no central-station alarm, you get to install an alarm bell somewhere.

 

[Ken In NJ]

I just did two hoods in Baltimore Md last month .. Not only was the exhaust fan required to stay on if the Ansel was pulled or a link burnt, it was also required to start even with its switch in off position, if either occurred. A bell was also required to be activated in both cases.

Ansel system installers in Maryland must know each county's codes for hoods .. they are all a bit different. Some dont even require an Ansel in some hoods. Just did two of those as well in Maryland.

 

[LarryFine]

NFPA 96 speaks of hoods but does it say that all circuits (including luminairs) must open when the ansel system is activated? I Know that the fan must stay on but what about the lights.

Here, the lights, too. As for fans, the exhaust must turn or stay on, and the makeup must turn or stay off.

The best bet is to ask the authority (or two) who will inspect the system; typically, electrical and fire.