Transformer secondary

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hhsting

Senior Member
Location
Glen bunie, md, us
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Junior plan reviewer
I have 480/277V to 208/120V three phase 112.5kva transformer secondary conductors 2 sets of 3/0 awg, #3 EG feeding to 400 amps disconnect switch labeled E2.

The line side of the disconnect switch E2 I have 4 - 500kcmil, #1/0G to 208/120V, three phase, 400 amp MCB panel labeled CL.

The load side of the disconnect switch E2 I have 2 sets of 3/0awg, #3 EG feeding to 208/120V, three phase 400 amps MLO panel GL.

My question Is the above transformer secondary condcutor tap of a tap, splice or even allowed under 240.21(C) since the secondary transformer conductor feed disco E2 feed to Panel GL and at disco E2 feed Panel CL?
 
hhsting said:
I have 480/277V to 208/120V three phase 112.5kva transformer secondary conductors 2 sets of 3/0 awg, #3 EG feeding to 400 amps disconnect switch labeled E2.

The line side of the disconnect switch E2 I have 4 - 500kcmil, #1/0G to 208/120V, three phase, 400 amp MCB panel labeled CL.

The load side of the disconnect switch E2 I have 2 setos of 3/0awg, #3 EG feeding to 208/120V, three phase 400 amps MLO panel GL.

My question Is the above tap of a tap, splice or even allowed under 240.21(C)?
Click to expand...

Something is not making sense. You have two different sets of line side conductors for the switch E2.
 
infinity said:
Something is not making sense. You have two different sets of line side conductors for the switch E2.
Click to expand...
At line side of switch E2 terminal I have incoming transformer secondary conductors. However at line side of E2 same terminal as transformer secondary conductors are incoming, I also I have outgoing conductors feeding Panel C1.


Also load side of the swtich E2 feeds panel GL.
 
Last edited:
hhsting said:
At line side of switch E2 terminal I have incoming transformer secondary conductors. However at line side of E2 same terminal as transformer secondary conductors are incoming, I also I have outgoing conductors feeding Panel C1.


Also load side of the swtich E2 feeds panel GL.
Click to expand...

Start a new thread after you get your terminology and actual installation straight.

Roger
 
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