Boiler Disconnect

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ELAR

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I'm reviewing a design at a plant with a Boiler. The EE has the circuit breaker (which is capable of being locked in the open position) in an MCC in another room from the boiler. The AHJ is stating that by some mechanical code there needs to be a disconnect at the boiler. I can't get ahold of the AHJ to confirm which code.

Can anyone tell me which code this is and what it actually states?

Thank you,
 
427.55

switch or circuit breaker

means shall be provided to disco all fixed elec pipeline or vessel equipment from all ungrounded conductors. The branch circuit disco where readily accessible to the user of the equip shall be permitted to serve as the disco means. the disco shall be of the indicating type and shall be provided with a positive lockout in the 'off' position.
 
I am not sure if that is what you are after..I believe it is a fire code the fire captain made us install a disconnect out side the room so it can be locked out prior to the fire fighters entrance into the room..but ours is outside so they can shut whole building down includes lights..You smile as you comply
 
In MA, there needs to be a switch to shut power to an oil burner, (emergency switch) but can not be in the same room as the unit. This is in the MA oil burner code. As far as a switch on the burner, I'm not sure if it is code ( I can check) but there needs to be one at least for practical reasons for the technician to use when setting up the burner.
 
We install wiring for large boilers all the time and most if not all of the burners have a breaker mounted right on the side of the control panel from the manufacturer. There is also requirements to have a "emergency" switch outside of the room to kill the control voltage by fire safety code. We have never put in a disco for a burner that I have worked on.
 
I don't have it at my fingertips, but it's either the IFGC or the IMC that requires that the boiler disconnect be operable by the serviceman while the flame is being observed.
 
Here you go. Take a look at NFPA 31. It seems to require 2 disconnects. One at a safe distance from the boiler (10.5.1.1), and one that the serviceman can operate while observing the flame (10.5.2):

emergencyswitch.jpg
 
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j_erickson said:
In MA, there needs to be a switch to shut power to an oil burner, (emergency switch) but can not be in the same room as the unit. This is in the MA oil burner code. As far as a switch on the burner, I'm not sure if it is code
Click to expand...

Both those requirements in in the MA "Oil Burner" code

527 CMR 4.00:
 
Residential oil burners by me

Residential oil burners by me

Are usually eqiuped by building code I think with an emergency shutoff switch at the top of the stairs or outside of the area where the burner is to shut down the power to the burner remotely in case the burner itself is on fire. It will shut down the fuel pump to stop pumping fuel into the fire you are trying to put out. This is separate from the service disconnect and is at the top of all basement stairs if the burner is installed in the basement as most are in my area. There are usually firematic valves on the supply lines which have fusible knobs which will melt in the event of a fire and drop the valve actuator shut when melted.
 
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