"Six Throws" Grouping of Service Disconnects via (6) Inside 42 Circuit Load Centers

Status
Not open for further replies.

cottora

Senior Member
Location
Atlanta, GA
If the transformer is not utility owned then the medium voltage is the service voltage - you still need a service disconnecting means that complies with art 230 on your medium volts service conductors.

The secondary of the transformer is a separately derived system. Tap rules in 240.21 do apply to the secondary conductors.

If the transformer is not in or attached to (or possibly immediately adjacent to - code doesn't really give a distance before it is not considered a separate structure) then the feeder(s) supplying a separate structure need to comply with art 225 part II. Six disconnect rule in there is basically the same as it is in art 230.

You make an interesting point. The transformer supplier can supply a transformer with secondary fuses AND the transformer will have a disconnect (LBOR). Why can't the transformer disconnect be the disconnecting means? An interesting point, while we plan to put the transformer outside, it is rated for indoor/outdoor use so it could be inside (which it then seems the transformer would be required to have a disconnect).
 
Status
Not open for further replies.
Top