Splicing and Reducing

Status
Not open for further replies.
M

mstrlucky74

Senior Member
Location
NJ
Hey guys having a hard time selecting which would be the right tap connector in this scenario. The 400 feeder tag are 4#500 & #2G, the 225 feeder tag is 4#4/0 & #4G and the 100(2 of these) feeder tag is 4#2 & #8G. The fuse cut out is not in this scenario.

http://www.polarisconnectors.com/black.html

So (4) 500's are being tapped to (4)4/0 and (4) #(2) x2. This is just for the hots & neutrals. So essentially I need 16 ports. So I'm thinking I can use the IPLS series #500 8 port x2. Or would I need the reducing series. Thanks.
 

Attachments

  • Capture.JPG
    Capture.JPG
    109.3 KB · Views: 0
I think you are misreading. You do need 16 (or more) "ports" overall, but each phase only needs 4 tap ports + the supply port.
 
A couple of things:

You might want to RFI or "keep it in your pocket" for later that the equipment ground (taps) to the 400 amp feeder are undersized.

Also the 100 amp feeders (as designated) are to be kept to a 10' tap or they will have to be upsized if over 10'. You might want to build that into the estimate.

Joe Villani
 
Joe Villani said:
A couple of things:

You might want to RFI or "keep it in your pocket" for later that the equipment ground (taps) to the 400 amp feeder are undersized.

Also the 100 amp feeders (as designated) are to be kept to a 10' tap or they will have to be upsized if over 10'. You might want to build that into the estimate.

Joe Villani
Click to expand...

How are the equipment ground sizes calculated?

Why only the 100A feeders. Why not the 225 as well? Thanks.
 
mstrlucky74 said:
How are the equipment ground sizes calculated?
Click to expand...
Based on the OCP device protecting ahead of the phase conductor (in this case based on 400 amps) but never larger than the tap conductor itself.

mstrlucky74 said:
Why only the 100A feeders. Why not the 225 as well? Thanks.
Click to expand...
The 10 ft tap rule limits the ampacity of the tap conductor to 10% of the protective device ampacity.
Once you exceed 10ft, the tap conductor ampacity must be 1/3 the rating of the OCP. In your case, beyond 10 ft (to 25') would require a conductor with an ampacity 1/3 of 400 or 133 amps.
(There are other tap rules that could apply).
 
augie47 said:
Based on the OCP device protecting ahead of the phase conductor (in this case based on 400 amps) but never larger than the tap conductor itself.


The 10 ft tap rule limits the ampacity of the tap conductor to 10% of the protective device ampacity.
Once you exceed 10ft, the tap conductor ampacity must be 1/3 the rating of the OCP. In your case, beyond 10 ft (to 25') would require a conductor with an ampacity 1/3 of 400 or 133 amps.
(There are other tap rules that could apply).
Click to expand...

Thanks. I'm going to study up on this tonight. Probably should already know...:jawdrop:
 
Status
Not open for further replies.
Top