Electrician CT configuration

D

Denz12

Guest
Hello,
I’m working on a Baltimore project and I wanted to know what I’m showing in the riser diagram is adequate. I have a service end box and ct cabinet. Off the CT cabinet I show 4 taps for four 400A service switches. Is this correct or do I need to add in a fused service disconnect on the secondary side of the ct section to be my main service switch and then the 4 switches downstream can regular switches in a switchboard configuration?

Please let me know
Thank you
 
The NEC requires:
"The service disconnecting means shall be installed at a readily accessible location either outside of a building or structure or inside nearest the point of entrance of the service conductors"

That distanced is most often determined by local AHJ and the conditions of the job.
I all probability you will need a main service disconnect due to the required length of the conductors.but it would be as local decision.
 
All equipment is inside the building and following NEC 2020 code. Was trying to dissect nec 230.71 which I believe is the correct code section.
 
Denz12 said:
All equipment is inside the building and following NEC 2020 code. Was trying to dissect nec 230.71 which I believe is the correct code section.
Click to expand...
If all of the service disconnects are grouped you may not need a main but as Augie stated that is up to the AHJ to decide. A single switchboard with 4 service disconnects may be a better option.
 
Denz12 said:
All equipment is inside the building and following NEC 2020 code. Was trying to dissect nec 230.71 which I believe is the correct code section.
Click to expand...
230.71 allows the 4 disconnects, 230.70(A)(1) is where the limitations get you
 
You must log in or register to reply here.
Top