dwelling vs. office space etc.

Status
Not open for further replies.
roger said:
That is correct if the downstream panel is fed from a "Lighting and Appliance Branch-Circuit Panelboard".



If the downstream panel is a "Lighting and Appliance Branch-Circuit Panelboard" and is fed from the Main Disconnect (as in Service) it can use 310.15(B)(6) in that the feeder would meet the definition of a Main Power Feeder.




Well, since these feeder conductors are "to a dwelling unit" it would seem as though by the wording itself it is referring to a Main Power Feeder, not a sub-fed downstream panel.

If the paragraph used wording such as "to a pump" it would it would cover more than just a Main Power Feeder.

Roger
Click to expand...
There's nothing in the code refering to sub-panel, just panels and switchboards. 310.15 most certainly applies to the original question.
 
Please do tell, where did I use the term "sub-panel"?

Reread your post and you will find you used it.

310.15 does not apply to any feeder leaving a "Lighting and Appliance Branch-Circuit Panelboard", it only applies to a feeder (not all) leaving the Main Disconnect and feeding a "Lighting and Appliance Branch-Circuit Panelboard" immediatly downstream (this does not mean distance if you're wondering) from this Main Disconnect.

Roger
 
roger said:
310.15 does not apply to any feeder leaving a "Lighting and Appliance Branch-Circuit Panelboard", it only applies to a feeder (not all) leaving the Main Disconnect and feeding a "Lighting and Appliance Branch-Circuit Panelboard" immediatly downstream (this does not mean distance if you're wondering) from this Main Disconnect.
Click to expand...
Right. Run all of your feeders directly from the main and you can use '.15.(B)(6).
 
LarryFine said:
Right. Run all of your feeders directly from the main and you can use '.15.(B)(6).
Click to expand...

Absolutely if they are feeding a "Lighting and Appliance Branch-Circuit Panelboard".

Roger
 
Let me see if I understand what you guys are saying.

If I install a 100A sub-panel directly beside a 200A main panel and feed the sub thru a 100A breaker mounted in the main panel; I cant use #4 Cu [Table 310.15(B)(6)] conductors to feed the sub and must go larger?

If I tap directly off the main breaker in the same panel and eliminate the 100A breaker; I can use #4 Cu?

Is this what you're saying?
steve
 
Status
Not open for further replies.
Top