running thin wall on the concrete floor

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reyamkram

Senior Member
Location
Hanover park, il
I do not know if there is any rule or reason, why I can not run 1/2 thin wall (EMT) on the floor under an injection molding machine, I will be installing water tight,
compression fitting, and using 2 hole 1/2" straps to fasten it in place, on the floor.

Is there any reason or rule, why I can not????

Thank you, for any and all information.
 

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
If completely under, and not in danger of being damaged or being a trip hazard, I don't see why not.

But then, can it not be mounted to or suspended from the bottom of the machine?
 

reyamkram

Senior Member
Location
Hanover park, il
If completely under, and not in danger of being damaged or being a trip hazard, I don't see why not.

But then, can it not be mounted to or suspended from the bottom of the machine?
No, the machine is all ready there, I am going to fasten to the floor, where it stars to go under the machine, then stub up, on the other side, connect sealtight, for about 5' then to a 1900 box for an duplex receptacle, No, there will not be a trip hazard,


Thank you, very munch for your replay.
 

jap

Senior Member
Occupation
Electrician
Why the compression fittings?

I only ask because 2 hole straps and compression fittings make for a wavy looking pipe run.

JAP>
 

jap

Senior Member
Occupation
Electrician
who cares if it is under the machine.

I do, and, the location doesn't matter. It makes for a wavy pipe run.

1 hole and 2 hole straps have their place.

In a pipe run with the compression fittings contacting a flat surface is not one of them.

At least not on my crew or the professionals I was trained by.

JAP>
 

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
I do, and, the location doesn't matter. It makes for a wavy pipe run.

1 hole and 2 hole straps have their place.

In a pipe run with the compression fittings contacting a flat surface is not one of them.

At least not on my crew or the professionals I was trained by.

JAP>
Why would it be wavy? If the straps are close to the couplings it should be straight. If you're talking about the thickness of the couplings then a back strap and a one hole strap will solve that problem.
 

gadfly56

Senior Member
Location
New Jersey
Occupation
Professional Engineer, Fire & Life Safety
Why would it be wavy? If the straps are close to the couplings it should be straight. If you're talking about the thickness of the couplings then a back strap and a one hole strap will solve that problem.
I think that's jap's issue. If you drop a strap in the middle of each stick, in profile it will look like a saw tooth wave, albeit of very low amplitude.
 

jap

Senior Member
Occupation
Electrician
We even slight offset out of 4sq boxes into minnies seeing as how whoever designed the conduit clamps didn't take the time to make the standoff match the standoff of the boxes.

Those 2 guys really should have gotten together before those items were first put into production. :)

JAP>
 

kwired

Electron manager
Location
NE Nebraska
We even slight offset out of 4sq boxes into minnies seeing as how whoever designed the conduit clamps didn't take the time to make the standoff match the standoff of the boxes.

Those 2 guys really should have gotten together before those items were first put into production. :)

JAP>
That can sort of depend on the box and raceway size. Boxes with concentric or eccentric type 1/2 and 3/4 KO's might be closer to lining up with 1/2 inch standoff clamp but not so much with 3/4, without bending offsets.
 

jap

Senior Member
Occupation
Electrician
That can sort of depend on the box and raceway size. Boxes with concentric or eccentric type 1/2 and 3/4 KO's might be closer to lining up with 1/2 inch standoff clamp but not so much with 3/4, without bending offsets.
They're close but no cigar. :)

JAP>
 
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