Need help w/ Disconnect in dry well

[echo14]

Need someones help>>>>I have a Nema4X disconnect mounted in a manhole. The manhole is for access to an in line pump used for discharging treated waste water into a creek. Is it within code to have this disconnect mounted high on the inside wall of this manhole underground. The manhole is approximatley 5ft deep.

Appeciate your support.

Thanks
Echo14

 

[steve66]

Probaby not legal because the area is probably a hazardous location.

NFPA 820 has the answer, but it might depend on the amount of ventilation provided, and some other items.

 

[mcclary's electrical]

Probaby not legal because the area is probably a hazardous location.

NFPA 820 has the answer, but it might depend on the amount of ventilation provided, and some other items.

What makes yo uthink it's a hazardous location? He said it's just water, and supposedly(hopefully) it's been treated and filtered ,since it's pumping into a creek. (is that legal? is the op in japan?)

but anyway, the disconnect sound legal to me

 

[Buck Parrish]

Need someones help>>>>I have a Nema4X disconnect mounted in a manhole. The manhole is for access to an in line pump used for discharging treated waste water into a creek. Is it within code to have this disconnect mounted high on the inside wall of this manhole underground. The manhole is approximatley 5ft deep.

Appeciate your support.

Thanks
Echo14

You have described it as a dry well, that sounds legal, However thier may be an issue with fumes.
What's the volts, amps ?

 

[steve066]

What makes yo uthink it's a hazardous location?

Because he said "drywell" and "underground". Per NFPA 820, an underground drywell is hazardous unless provided with 6 air changes per hour.

However, the details make all the difference in the world here, and thats why I said "probably hazardous". Depending on exactly what they are pumping, it might not be hazardous. (For example, I think a private residential drywell isn't even covered by NFPA 820 - so it wouldn't be a hazardous location.)

He said it's just water, and supposedly(hopefully) it's been treated and filtered ,since it's pumping into a creek. (is that legal? is the op in japan?)

but anyway, the disconnect sound legal to me

If its treated, I'm not sure if it would be hazardous, or not, but he didn't say it was treated. I don't think NFPA 820 uses the term "drywell" to describe treated water pump locations.

But maybe we are using two completely different definitions for a drywell.

 

[mcclary's electrical]

Because he said "drywell" and "underground". Per NFPA 820, an underground drywell is hazardous unless provided with 6 air changes per hour.

However, the details make all the difference in the world here, and thats why I said "probably hazardous". Depending on exactly what they are pumping, it might not be hazardous. (For example, I think a private residential drywell isn't even covered by NFPA 820 - so it wouldn't be a hazardous location.)



If its treated, I'm not sure if it would be hazardous, or not, but he didn't say it was treated. I don't think NFPA 820 uses the term "drywell" to describe treated water pump locations.

But maybe we are using two completely different definitions for a drywell.

The ventilation rate is calculated by the air changes per hour. The air changes per hour are calculated by the basis of the maximum aggregate volume to the space to be ventilated.

So, if it's clean water, I wouldn't consider it classified. As you said , we don't quite have enough info