SHEngineer
New member
Does NEC or NFPA 110 require a generator set to have a shutoff switch (E - stop)? Is there any code that requires E-stop for generators?
Thanks
Thanks
Emergency generator shuttoff switch requirement
- Thread starter SHEngineer
- Start date
- Status
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
I don't have a copy of NFPA 110 handy, seems like it and NEC requires a means to shut down the prime mover- that could be a fuel shut off. There is also a UL standard for generators UL2200, might check it.
Here is the NEC
445.18 Disconnecting Means Required for Generators.
Generators shall be equipped with disconnect(s), lockable in the open position, by means of which the generator and all protective devices and control apparatus are able to be disconnected entirely from the circuits supplied by the generator except where both of the following conditions apply:
(1) The driving means for the generator can be readily shut down.
(2) The generator is not arranged to operate in parallel with another generator or other source of voltage.
Here is the NEC
445.18 Disconnecting Means Required for Generators.
Generators shall be equipped with disconnect(s), lockable in the open position, by means of which the generator and all protective devices and control apparatus are able to be disconnected entirely from the circuits supplied by the generator except where both of the following conditions apply:
(1) The driving means for the generator can be readily shut down.
(2) The generator is not arranged to operate in parallel with another generator or other source of voltage.
Yes, I can't remember if it is NFPA 110, or if it is NFPA 99 (which would only apply to health care facilities.)
But a remote (not in the same room for indoor locations) estop is normally required. I think there is also a requirement for a glass sidelight in the door to the generator room (again - indoor generators only) so someone can look inside the room for a fire before entering.
Steve
But a remote (not in the same room for indoor locations) estop is normally required. I think there is also a requirement for a glass sidelight in the door to the generator room (again - indoor generators only) so someone can look inside the room for a fire before entering.
Steve
NFPA 110:
5.6.5.6.1 The remote manual stop station shall be labeled.
The glass sidelight in the door I mentioned earlier might be a local requirment.
5.6.5.6*
All installations shall have a remote manual stop station of a type to prevent
inadvertent or unintentional operation located outside the room housing the prime mover,
where so installed, or elsewhere on the premises where the prime mover is located outside the
building.
inadvertent or unintentional operation located outside the room housing the prime mover,
where so installed, or elsewhere on the premises where the prime mover is located outside the
building.
5.6.5.6.1 The remote manual stop station shall be labeled.
The glass sidelight in the door I mentioned earlier might be a local requirment.
John Paul
Member
- Location
- Norfolk, VA
What about the height of the E-Stop? I have a 300kW Cat and it's sitting on top of a 72 hour diesel supply. I have to jump to reach the E-stop and I am 6' tall.
I don't like it, is there a rule preventing this?
I don't like it, is there a rule preventing this?
John Paul
Member
- Location
- Norfolk, VA
Self answered. Did some more searching on this forum and found a reference to NFPA 79:
10.7 Devices for Stop and Emergency Stop.
10.7.1 Location and Operation.
10.7.1.1 Stop and emergency stop pushbuttons shall be continuously operable and readily accessible.
10.7.1.2 Stop or emergency stop pushbuttons shall be located at each operator control station and at other locations where emergency stop is required.
10.7 Devices for Stop and Emergency Stop.
10.7.1 Location and Operation.
10.7.1.1 Stop and emergency stop pushbuttons shall be continuously operable and readily accessible.
10.7.1.2 Stop or emergency stop pushbuttons shall be located at each operator control station and at other locations where emergency stop is required.
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