3W for 2W

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horsegoer said:
No they just denied the use. they want us to use MC cable and splice to SER when we penetrate the wall going outside.
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Would this be on the feeder to the trailer?

Locations of this splice, ahead of or on load side of disconnect.

Your transformer and all secondary along with the disc are inside then feeders from there to trailers.


Draw us a pic
 
horsegoer said:
No they just denied the use. they want us to use MC cable and splice to SER when we penetrate the wall going outside.
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So let's see if we have this straight. You're going from the transformer secondary to 3 disconnects with 3 runs of MC cable. The disco's are near the transformer. From the load side of the disco's you're running MC cable to the exterior wall of the building where you will transition to SER cable to run to the trailer panel.
 
infinity said:
So let's see if we have this straight. You're going from the transformer secondary to 3 disconnects with 3 runs of MC cable. The disco's are near the transformer. From the load side of the disco's you're running MC cable to the exterior wall of the building where you will transition to SER cable to run to the trailer panel.
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Yes, the disconnects are exterior and will feed the trailer panels. Breaker panel are insane lead times right now.

So from the secondary side of the xfrm I'm running (3) MC cable( was going to use SER but they shot it down inside) about 90' to wall where we will splice and convert over to SER to feed the outdoor disconnects. We will then run SER from the disconnects to the trailer panels.
 
Here's apic I drew before they shot down the SER inside. Again the splice box will be on wall before we go outside.
The pink is what I just drew in as we're required to use MC inside. Pretty bad pic, I know.
 

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horsegoer said:
Here's apic I drew before they shot down the SER inside. Again the splice box will be on wall before we go outside.
The pink is what I just drew in as we're required to use MC inside. Pretty bad pic, I know.
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Where are the disconnects located?
 
infinity said:
Where are the disconnects located?
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On the other side of the wall. Not in site of the xfrmr. Is that a problem? THere is a door right next to the disconnect that if you open the door you can see the xfrmr? I hope not as I'll be screwed because I submitted my price and it was accepted.
 
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horsegoer said:
On the other side of the wall. Not in site of the xfrmr. Is that a problem? THere is a door right next to the disconnect that if you open the door you can see the xfrmr? I hope not as I'll be screwed because I submitted my price and it was accepted.
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The secondary conductors are limited in length by 240.21 so how far away are the disco's? Since this is temporary it probably won't be inspected correct?
 
I think you are too concerned about the details and lack the field experience. I would think you best bet would be to sketch a oe-line, order the transformer and disconencts and turn the job over to a qualified journeyman. It, should be a fairly routine install for an experienced electrician.
 
augie47 said:
I think you are too concerned about the details and lack the field experience. I would think you best bet would be to sketch a oe-line, order the transformer and disconencts and turn the job over to a qualified journeyman. It, should be a fairly routine install for an experienced electrician.
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Yes the install is very straightforward but I do want to have the materials ready for when they get onsite.
 
Just my 2 cents but it seems to me that your initial plan of feeding a panel from the transformer with the panel right next to it was a better choice. Since your labor costs are very high running 3 sets of secondary conductors to 3 separate fused disconnect switches that have to be mounted and wired doesn't seem like you saved any money. A panel would have been less work, cleaner, and would leave some room for expansion down then road if needed.
 
infinity said:
Just my 2 cents but it seems to me that your initial plan of feeding a panel from the transformer with the panel right next to it was a better choice. Since your labor costs are very high running 3 sets of secondary conductors to 3 separate fused disconnect switches that have to be mounted and wired doesn't seem like you saved any money. A panel would have been less work, cleaner, and would leave some room for expansion down then road if needed.
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I hear you but the panels was almost $6k and a lead time of 3-4 weeks. The disconnects were $900 and in stock.
 
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