Receptacle outside in grass ground

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hhsting

Senior Member
Location
Glen bunie, md, us
Occupation
Junior plan reviewer
I have 120V single phase 20A duplex receptacles for sump pump outside in grass ground. I can see hazards from this and also all the rain and water can get inside the receptacles even though enclosure proper used nema rated.

Does NEC 2014 have any code section that would make it non compliance or in violation?
 

480sparky

Senior Member
Location
Iowegia
Not sure what 'grass ground' means, but how does the water get into a properly used NEMA enclosure?

406.9(B) is probably a good start.
 

hhsting

Senior Member
Location
Glen bunie, md, us
Occupation
Junior plan reviewer
Not sure what 'grass ground' means, but how does the water get into a properly used NEMA enclosure?

Grass ground = Lawn. Its installed in the lawn as if lawn was the floor. You know dirt no concrete floor nothing. Its just installed outside in the dirt with lawn.
 

JGinIndy

Senior Member
Location
Indiana
Occupation
Retired Electrician currently County Inspector
Educate me. There is a sump pump installed outside of the house, building, structure?
 

JGinIndy

Senior Member
Location
Indiana
Occupation
Retired Electrician currently County Inspector
I have a sump pump adjacent to my pool to keep ground water from floating the liner. The receptacle is is at the top of the sump tube in a weatherproof box.
Ok that type of sump pump, now that makes sense. I was picturing a sump pump in the ground along the foundation, silly me, go figure
Thanks
 

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
I think I'd prefer a vertical box on a pedestal, like the Arlington Gard-N-Post:

Added: I also thought of inside the tube if it's not likely to ever become submerged.


1613614683509.png 1613614716877.png
 

hhsting

Senior Member
Location
Glen bunie, md, us
Occupation
Junior plan reviewer
Is this what you're aiming for?
View attachment 2555389

Seriously you can put in hand hole like this (below) and put a wet location box/receptacle inside
View attachment 2555390
But I think what @LarryFine suggested would be way more cost effective.

Ummm I rather be safe then sorry putting things in ground and where water can mix with who knows what. Never seen receptacle in ground. Indoor in home or in store yes floor receptacles I have seen. Never outdoor in ground. Our AHJ already had electrical accidents serious major ones.
 

jap

Senior Member
Occupation
Electrician
The code doesn't need to justify what our gut instinct is already telling us.

"Ummm I rather be safe then sorry putting things in ground and where water can mix with who knows what. Never seen receptacle in ground. Indoor in home or in store yes floor receptacles I have seen. Never outdoor in ground. Our AHJ already had electrical accidents serious major ones.."

You're concerns are valid. I think I'd investigate a different solution to get the water out. Maybe a remote pump with a suction line to the drain hole or something similar.

JAP>
 

JGinIndy

Senior Member
Location
Indiana
Occupation
Retired Electrician currently County Inspector
We used to drive strut in the ground along side the 3/4 pvc stub up 12 or so inches above grade then spring nut the box. Then for that Rembrandt look we painted the strut per owners choice “ forest green “
 

jap

Senior Member
Occupation
Electrician
We used to drive strut in the ground along side the 3/4 pvc stub up 12 or so inches above grade then spring nut the box. Then for that Rembrandt look we painted the strut per owners choice “ forest green “

Oh the good ole days,,,, back when you had time to paint galvanized strut after the install because that's what was on the truck from the commercial job you just did instead of having to go buy a whole stick of that odd green strut they sold that we'd never use. :)

Back before we realized we needed to drill a weep hole in the bottom of a perfectly good weather proof box to let the water out that was getting in around the hole in the back of the box that was used to spring nut it to the strut.

Back when, and still today, even if you took silicone and sealed off every possible gap the box would still get moisture in it due to condensation and rust the bottom 6/32 device screw so that when you went to remove it , it would strip off and you'd have to change the whole box out to make things right.

And, and, on top of all that, the owner had to weed eat around it which all too often resulted in a broken pvc pipe or a bent over stubup because they tried to mow so close they'd not have to weed eat around it.

Yard receptacles,,,,, what a pain.

Just funning,, it's cold out.

JAP>
 

mopowr steve

Senior Member
Location
NW Ohio
Occupation
Electrical contractor
Quite frankly any weatherproof box with in-use cover in an enclosed sump pump pit as you describe will fail in short time due to rising evaporation/condensation. After dealing with just this situation a few times, I would recommend that you install an actual wet rated male/female cord cap right on the wire and GFCI protect right at the panel.
 

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
After dealing with just this situation a few times, I would recommend that you install an actual wet rated male/female cord cap right on the wire and GFCI protect right at the panel.
What's the interface between the cord and the underground wiring?

Do we know the underground wiring method, and whether it can accept a female cord cap?
 
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