Tap or Not

[mstrlucky74]

Was wondering on thoughts of this setup and if a tap/tab boxis necessary or way to go. Following proposed by someone to feed a (2) 1600Apanels which are about 200’ away from each other. Coming off 2500A switch in switchboardwith (6) sets 4 #600 to a tap box 20’(installing disconnects) away then tappingand running to each panel.

 

[augie47]

IMO, sounds like a reasonable set-up. I doubt you could arrange for that many conductors to be connected directly to the 2500 amp breaker. An additional switcboard section might be another option.

 

[Smart $]

If by "(installing disconnects)" you mean you are installing two fused disconnects, one for each panel, then simply run 4 sets of (4) 600kcmil to each disconnect... then continue to each panel. If the 2500A switch has bus plate terminals with 4 or 4 pair of holes, you should be good to go.

From 2500A switch to disconnects must meet the tap rule of 240.21(B)(2), or 240.92(B) if a supervised industrial installation.

 

[mstrlucky74]

If by "(installing disconnects)" you mean you are installing two fused disconnects, one for each panel, then simply run 4 sets of (4) 600kcmil to each disconnect... then continue to each panel. If the 2500A switch has bus plate terminals with 4 or 4 pair of holes, you should be good to go.

From 2500A switch to disconnects must meet the tap rule of 240.21(B)(2), or 240.92(B) if a supervised industrial installation.

Why is there a tap rule from 2500A to disconnects?

 

[Smart $]

Why is there a tap rule from 2500A to disconnects?

The setup I suggested is to run 4 sets 600kcmil from switch to each disconnect (total 8 sets)...

... otherwise, you have to run 6 sets to tap box then tap off all 6 to run 4 to each disconnect.

Or am I not getting the picture of what you are wanting to do correct?

 

[mstrlucky74]

The setup I suggested is to run 4 sets 600kcmil from switch to each disconnect (total 8 sets)...

... otherwise, you have to run 6 sets to tap box then tap off all 6 to run 4 to each disconnect.

Or am I not getting the picture of what you are wanting to do correct?

No, your correct? Thanks.