cafeteria kitchen in schools?

[steveng]

what article applies to the requirements of installed commercial eqipment, such as vent a hoods, power and gas distribution equipment used in kitchens
in schools/colleges?

we are in the planning stage and bidding process of upgrading a cafeteria
kitchen in a area school, and i am asking for some help in this area.

1. what are the code requirements for vent a hoods,ie fire suppression systems, such as ansul and others?

2. what article covers this installation?


3. when upgrading a kitchen would the existing 120v rec outlets have to be changed to gfci's?

we have an existing avtec 100 amp 3ph 208/120 power distribution & natural gas system, which was installed in 77, we have 1 exhaust fan on this hood,

any enginners comments would be appreciated.

thanks,
steve

 

[mdshunk]

Most of your answers are in NFPA 17 and NFPA 17A.

 

[steveng]

thanks marc

thanks marc

Most of your answers are in NFPA 17 and NFPA 17A.

thanks marc,

 

[Buck Parrish]

All your outlets near or under the hood. Must turn off, loose power when the fire supression eqiupment is activated.

 

[scrooge]

All your outlets near or under the hood. Must turn off, loose power when the fire supression eqiupment is activated.

I have also wired in a valve to shut off gas at this location to same. A fresh air supply motor is also.

 

[steveng]

thanks scrooge

thanks scrooge

I have also wired in a valve to shut off gas at this location to same. A fresh air supply motor is also.

so, when the fire suppression system is activated, the trip circuit relay deenergizes the power to the hood,fans, gas valve, basically shutting down the systems power and gas?

thanks for the info, has anyone installed of of these systems recently?

is a shunt trip breaker required ?

thanks,
steven

 

[quogueelectric]

so, when the fire suppression system is activated, the trip circuit relay deenergizes the power to the hood,fans, gas valve, basically shutting down the systems power and gas?

thanks for the info, has anyone installed of of these systems recently?

is a shunt trip breaker required ?

thanks,
steven

Most commercial kitchens I have done incorporate a shunt trip on the kitchen panel main tied into the fa panel.

 

[LarryFine]

so, when the fire suppression system is activated, the trip circuit relay deenergizes the power to the hood,fans, gas valve, basically shutting down the systems power and gas?

thanks for the info, has anyone installed of of these systems recently?

is a shunt trip breaker required ?

Steve, I've done quite a few, and no two installations are the same. (In fact, I'm heading out to do one today.) Some systems have a separate intake (make-up air) blower, some have one switch for both fans, some two separate switches, some have multiple fans, etc.

When the system trips, any electrical equipment (in some places, only heat-sources) under the hood must de-energize, including the intake fans and often the lights, gas must shut down (usually electrically), and the exhaust must come (or stay) on. There may also be a horn/strobe unit.

Shunt-trip breakers are one method of de-energizing circuits, contactors are another. In case of a large amount of electrical equipment, a main shunt-trip breaker in one panel can be cheaper than individual breakers, but remember that the exhaust fans need uninterrupted power.

 

[steveng]

thanks Larry

thanks Larry

Steve, I've done quite a few, and no two installations are the same. (In fact, I'm heading out to do one today.) Some systems have a separate intake (make-up air) blower, some have one switch for both fans, some two separate switches, some have multiple fans, etc.

When the system trips, any electrical equipment (in some places, only heat-sources) under the hood must de-energize, including the intake fans and often the lights, gas must shut down (usually electrically), and the exhaust must come (or stay) on. There may also be a horn/strobe unit.

Shunt-trip breakers are one method of de-energizing circuits, contactors are another. In case of a large amount of electrical equipment, a main shunt-trip breaker in one panel can be cheaper than individual breakers, but remember that the exhaust fans need uninterrupted power.

Thanks for the explanation Larry, just what i was looking for, someone who had been doing these, this one is circa 77, you can imagine the condition the fans are in.