Generator Remote Stop Location

[mh06670]

Does NEC or NFPA 110 have a location requirement for an exterior generator remote stop? If the generator was inside, I know the remote stop needs to be outside the generator room. In this case, it's an exterior location with a screen wall. Does the remote stop need to be outside the screen wall? Or just on the exterior wall of the building?

 

[Knightryder12]

Does NEC or NFPA 110 have a location requirement for an exterior generator remote stop? If the generator was inside, I know the remote stop needs to be outside the generator room. In this case, it's an exterior location with a screen wall. Does the remote stop need to be outside the screen wall? Or just on the exterior wall of the building?

My thought would be that it would have to be located by the existing service main for the grouping of the mains. But that's just my thoughts.

 

[kwired]

My thought would be that it would have to be located by the existing service main for the grouping of the mains. But that's just my thoughts.

I disagree. Only the disconnecting means of "a permitted service" need to be grouped together. Other allowed services do not need to be grouped with other services, neither does disconnecting means for on site derived sources.

I don't believe what OP is asking about is even a disconnecting means, it is a control device for the prime mover of the generator.

 

[ron]

I'm not familiar with NFPA 110 because it is not adopted as a code in the jurisdictions that I work in, but I typically only have the EPO on the control panel mounted on the engine itself.

 

[texie]

Does NEC or NFPA 110 have a location requirement for an exterior generator remote stop? If the generator was inside, I know the remote stop needs to be outside the generator room. In this case, it's an exterior location with a screen wall. Does the remote stop need to be outside the screen wall? Or just on the exterior wall of the building?

This is an area that it will depend on your NEC version. There are some new requirements for 2017. See 445.18.

 

[mh06670]

My thought would be that it would have to be located by the existing service main for the grouping of the mains. But that's just my thoughts.

For this same project, the local code in Henderson, NV requires an exterior service disconnect which is located within 12’ of the service entrance. However, my question was about a prime mover remote stop button.


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[mh06670]

I'm not familiar with NFPA 110 because it is not adopted as a code in the jurisdictions that I work in, but I typically only have the EPO on the control panel mounted on the engine itself.

Yes, the EPO is usually mounted on the genset, but the remote stop is required to be outside the generator room. For example, if the generator was on fire, you would not want to have to go into that room to turn it off.


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[mh06670]

I disagree. Only the disconnecting means of "a permitted service" need to be grouped together. Other allowed services do not need to be grouped with other services, neither does disconnecting means for on site derived sources.

I don't believe what OP is asking about is even a disconnecting means, it is a control device for the prime mover of the generator.

Yes, that’s correct. I’m looking for location requirements for the prime mover control device. First post btw. Thanks for the responses. I’ll look in 445.18 when I get back to work tomorrow.


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[kwired]

Yes, the EPO is usually mounted on the genset, but the remote stop is required to be outside the generator room. For example, if the generator was on fire, you would not want to have to go into that room to turn it off.


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Valve in fuel line count as a EPO?

 

[mh06670]

Valve in fuel line count as a EPO?

No, I don’t think so.


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[shortcircuit2]

Valve in fuel line count as a EPO?

No. Prime mover shutdown must kill the mover electrically.

Like shutting the key off in your car, it stops running and won't start.

 

[drktmplr12]

is the generator is its own building or room? put yourself in a fire fighters shoes. Where will they likely approach from? put it there.

another option is to talk to the local fire marshal about it, after doing your research.

 

[mh06670]

This is an area that it will depend on your NEC version. There are some new requirements for 2017. See 445.18.

Can you quote the important parts of this section? I just looked at 2014 and that's what's applicable for this project. However I'm very curious what 2017 says. Thanks!

 

[mayanees]

Can you quote the important parts of this section? I just looked at 2014 and that's what's applicable for this project. However I'm very curious what 2017 says. Thanks!

445.18 Disconnecting Means and Shutdown of Prime Mover.
(A) Disconnecting Means. Generators other than cord-and-plug-connected portable shall have one or more disconnecting means. Each disconnecting means shall simultaneously open all associated ungrounded conductors. Each disconnecting means shall be lockable in the open position in accordance with 110.25.
(B) Shutdown of Prime Mover. Generators shall have provisions to shut down the prime mover. The means of shutdown shall comply with all of the following:
(1) Be equipped with provisions to disable all prime mover start control circuits to render the prime mover incapable of starting
(2) Initiate a shutdown mechanism that requires a mechanical reset

The provisions to shut down the prime mover shall be permitted to satisfy the requirements of 445.18(A) where it is capable of being locked in the open position in accordance with 110.25.

Generators with greater than 15 kW rating shall be provided with an additional requirement to shut down the prime mover. This additional shutdown means shall be located outside the equipment room or generator enclosure and shall also meet the requirements of 445.18(B)(1) and (B)(2).

 

[mh06670]

445.18 Disconnecting Means and Shutdown of Prime Mover.
(A) Disconnecting Means. Generators other than cord-and-plug-connected portable shall have one or more disconnecting means. Each disconnecting means shall simultaneously open all associated ungrounded conductors. Each disconnecting means shall be lockable in the open position in accordance with 110.25.
(B) Shutdown of Prime Mover. Generators shall have provisions to shut down the prime mover. The means of shutdown shall comply with all of the following:
(1) Be equipped with provisions to disable all prime mover start control circuits to render the prime mover incapable of starting
(2) Initiate a shutdown mechanism that requires a mechanical reset

The provisions to shut down the prime mover shall be permitted to satisfy the requirements of 445.18(A) where it is capable of being locked in the open position in accordance with 110.25.

Generators with greater than 15 kW rating shall be provided with an additional requirement to shut down the prime mover. This additional shutdown means shall be located outside the equipment room or generator enclosure and shall also meet the requirements of 445.18(B)(1) and (B)(2).

Thanks!


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[Waltron]

445.18 requires prime mover shutdown device located outside generator room for indoor installations or outside of the enclosure for exterior installations. Best bet would be to ask your inspector what he considers an “enclosure “ but generally speaking weatherproof cabinet or enclosure.