MUA shutdown on hood system activation

[cheyer]

Is the general consensus here to require ANY MUA supply near the hood system to shutdown during activation or ONLY a MUA supplied INTERNALLY to a hood as per NFPA 96-8.3.1?

I had always been under the impression it was any supply near the hood..............

 

[FM William Burns]

Internally, however we have had supply within 10 feet of hoods that affected the tests and required relays to shut them down upon system activation when applicable.

 

[cheyer]

Thanks FMWB,

Any other takers?...............