Pvc Junction Box In Concrete

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jflynn

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We are doing a supermarket remodel,the other night the G.C. was doing a saw cut for new plumbing and sawed thru the existing walker duct raceway destroying the conductors within the raceway at the saw cut.The customer (as always)wants the repair done the most economical way.The walker duct is for the cash registers,and the conductors are ok heading to the registers,the customers wants to entertain installing a splice box in lieu of replacing the conductors completly.we researched a walkerduct j-box,they really dont offer one for this application,there was talk of installing a PVC j-
box to make the splice;s.The intent is, to keep the cover of the PVC box down 1/8"from the finish floor,then installing a stainless steel cover larger than the pvc box flush with the finish floor.Looking in the NEC I could not find where this would not be compliant...any help would be appreciated....
 
2 Questions....

How are you making the transition from duct to conduit(i assume)?

I would guess the new j-box would be accessible? I had doubts by the way you worded "1/8 inch below finished floor."
 
barbeer said:
2 Questions....

How are you making the transition from duct to conduit(i assume)?

I would guess the new j-box would be accessible? I had doubts by the way you worded "1/8 inch below finished floor."
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The transition would be with a listed walkerduct to pvc fitting,- and pvc pipe between the walkerduct and j-box

The j-box will absolutely be accessible...
 
busman said:
S.S. cover on PVC box? How will it be grounded?

Mark
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THE S.S. cover will not be attached to the PVC box,the intent is to place the S.S. plate over the PVC box cover,to eliminate the PVC cover from being damaged.So to access the interior of the PVC box, you would remove both covers...
 
does this have power only? if it feeds the registers, is there a parallel one containing data cables that he cut as well?
 
jflynn said:
We are doing a supermarket remodel,the other night the G.C. was doing a saw cut for new plumbing and sawed thru the existing walker duct raceway destroying the conductors within the raceway at the saw cut.The customer (as always)wants the repair done the most economical way.The walker duct is for the cash registers,and the conductors are ok heading to the registers,the customers wants to entertain installing a splice box in lieu of replacing the conductors completly.we researched a walkerduct j-box,they really dont offer one for this application,there was talk of installing a PVC j-
box to make the splice;s.The intent is, to keep the cover of the PVC box down 1/8"from the finish floor,then installing a stainless steel cover larger than the pvc box flush with the finish floor.Looking in the NEC I could not find where this would not be compliant...any help would be appreciated....
Click to expand...

The customer is the GC.He is looking for cheap way out and short changing the owner.If it was me i would not want a patch job.As to legal i see no reason assuming you have enough slack in the wires to make legal splice.
 
Jim W in Tampa said:
The customer is the GC.He is looking for cheap way out and short changing the owner.If it was me i would not want a patch job.As to legal i see no reason assuming you have enough slack in the wires to make legal splice.
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Is there such a thing as a legal splice in Walker Duct?
 
wireguru said:
does this have power only? if it feeds the registers, is there a parallel one containing data cables that he cut as well?
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Your assumption is correct,the data cables were in fact cut,however we can make this repair with PVC conduit without a box,reason being,- they are pulling new data cables-...
 
barbeer said:
Why not use a listed floor box with a metal cover?
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Can you suggest one?we researched this,- and the only ones we could find as an actual floor box will be to small to allow the amount of conductors needed to be spliced....
 
Jim W in Tampa said:
The customer is the GC.He is looking for cheap way out and short changing the owner.If it was me i would not want a patch job.As to legal i see no reason assuming you have enough slack in the wires to make legal splice.
Click to expand...


The actual request came directly from the customer,they(gc/cus) were both present @ the time of discussing repair possibilities.I clearly told them the best repair would be to elimanate the j-box and re-pull all new conductors,on another note there will be plenty of slack to make a good splice...
 
iwire said:
I do not understand why one of the J-boxes on page 4 of this pdf file with an optional finished cover would not do the trick.
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Bob,this is exactly what we were pursuing, however looking @ the depth of the box,we figured its intent was more as a pull point rather than a splice box.
Plus there is 4-runs of #2 duct,the largest box was for 3-runs,with the 4th having to enter the angeled side of the box.The IG circuits alone all have seperate IG grounds, and grounded conductors-there are 33-#10;s in this duct alone,and the "dirty"power duct has 16-#10;s....
 
at least this was inside and not in the parking lot where the paving people or landscape guys would just splice the wires back together, bury it, and pretend nothing happened........
 
jflynn said:
Bob,this is exactly what we were pursuing, however looking @ the depth of the box,we figured its intent was more as a pull point rather than a splice box.
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The link I posted specifically says it is a suitable for splicing.

I work with Walker duct often and in the same application .... super markets.



Plus there is 4-runs of #2 duct,the largest box was for 3-runs,with the 4th having to enter the angeled side of the box.The IG circuits alone all have seperate IG grounds, and grounded conductors-there are 33-#10;s in this duct alone,and the "dirty"power duct has 16-#10;s....
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I fully understand, been there many times.

Anytime we have had an issue (usually shorts in the duct due to wax stripper) we simply re pull the entire duct.

For us that is usually 10 to 13 circuits of 3 wires each Hot, neut, ground. It ain't cheap but it is IMO the right thing to do.

IMO what your suggesting would be hard to accomplish code compliantly if that is even possible. IMO you need a floor rated box.
 
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