Would 682 apply to a tunnel?

[xguard]

Would article 682 (Naturally and Artificially Made Bodies of Water) apply to a ventilation building for a highway tunnel that passes under a canal? The service equipment is directly outside an exterior wall of the ventilation building that houses power and controls for ventilating the tunnel and pumping storm water out of the tunnel. The service is located about 130 feet from the canal that the tunnel passes under and does not supply any equipment in or on the canal itself. The are pumps are located in pump rooms along the tunnel and each has it's own pit, normally the water in the pit is from rain water. It's not clear to me if or how this article may apply. Someone is telling me it applies to the service equipment outside the building but this one is new to me. The building site is in flood zone x. Thanks for any feedback.

"Flood Zone: X-0.2 PCT ANNUAL CHANCE FLOOD HAZARD IN COASTAL ZONE"

 

[xguard]

Any feedback would be much appreciated.

 

[tortuga]

Would article 682 (Naturally and Artificially Made Bodies of Water) apply to a ventilation building for a highway tunnel that passes under a canal?

What happens if the land around the building floods? would water not get into the tunnel ?
Seems smart to have service equipment located 2' above the highest high tide.
I'd be looking at 682.4;
Do conditions of maintenance and supervision ensure only qualified persons service and operate the installed systems?
Is continued operation necessary for safe operation of equipment or processes?

 

[Fred B]

Not sure of that section applying but if you start applying 682 then it must be applied in its whole.
But minimally would definitely look at 110.59 is directly connected to tunnel uses and is not directly limited to datum plane levels.
2017, 2020, 2023 NEC 110.59 Enclosures.
Enclosures for use in tunnels shall be dripproof, weatherproof, or submersible as required by the environmental conditions. Switch or contactor enclosures shall not be used as junction boxes or as raceways for conductors feeding through or tapping off to other switches, unless the enclosures comply with 312.8.

With the tunnel going under the body of water suggests it is both below the datum plane and "environmental conditions" are such it is more than likely to become submersed.

Given your description of the installation I would say at a minimum any enclosure would need to be made suitable for submersion. Under such condition it would suggest per 110.28 table a NEMA 6 or 6P would be advised.

If applying 682 then same condition as 110.59 applies in 682.10 for equipment identified "for operation while submerged"
682.11 related to datum plane.
682.12 related to connections and rated for submersion
And probably one of the more important pieces related to safety is application of 682.33 particularly if the equipment is below the datum plane.

 

[Dennis Alwon]

IMO, It would not apply. That would mean any building near a waterway would have to be wired according to 682. There are many homes built in floodplains. Is it a 100 year flood zone

 

[xguard]

IMO, It would not apply. That would mean any building near a waterway would have to be wired according to 682. There are many homes built in floodplains. Is it a 100 year flood zone

No it is not in the 100 year flood zone.

 

[xguard]

Not sure of that section applying but if you start applying 682 then it must be applied in its whole.
But minimally would definitely look at 110.59 is directly connected to tunnel uses and is not directly limited to datum plane levels.
2017, 2020, 2023 NEC 110.59 Enclosures.
Enclosures for use in tunnels shall be dripproof, weatherproof, or submersible as required by the environmental conditions. Switch or contactor enclosures shall not be used as junction boxes or as raceways for conductors feeding through or tapping off to other switches, unless the enclosures comply with 312.8.

With the tunnel going under the body of water suggests it is both below the datum plane and "environmental conditions" are such it is more than likely to become submersed.

Given your description of the installation I would say at a minimum any enclosure would need to be made suitable for submersion. Under such condition it would suggest per 110.28 table a NEMA 6 or 6P would be advised.

If applying 682 then same condition as 110.59 applies in 682.10 for equipment identified "for operation while submerged"
682.11 related to datum plane.
682.12 related to connections and rated for submersion
And probably one of the more important pieces related to safety is application of 682.33 particularly if the equipment is below the datum plane.

Thanks, it looks like 110.59 is in part iv, over 1000 . We don't have anything over 1000 volts in the tunnel.