Maximum load

Status
Not open for further replies.
B

bennny123

Member
Location
cudahy,California
Is is permissible to use #4 type THW copper conductors for a service in dwelling units to the maxim load of _____ ???
The back of the book gives me Table 310.15(B)(7) the answer is 100 amps. My question is that sec a table ?? Because if it is i can't seem to find Table 310.15 (B)(7). How do they know its 100amps ?
 
The table was removed in the 2014, now you would calculate 83% of the service or disconnect rating. What code cycle is the study material based on? You may need to get an earlier code book.

Roger
 
bennny123 said:
I'm looking for it in 2011 nec its there .. thank u..
but you were saying 83% base off that question how would i apply the 83%
Click to expand...
Find the calculated load using either standard or optional method.
Multiply that by 83%>
That is the minimum calculated ampacity of the wires to use after any applicable adjustments and corrections.

Sent from my XT1585 using Tapatalk
 
bennny123 said:
I'm looking for it in 2011 nec its there .. thank u..
but you were saying 83% base off that question how would i apply the 83%
Click to expand...

The allowable "reduction" is still located at 310.15(B)(7).. look there in '14 pg 160 I believe.. it's just not a Table, it's a % of the service size.
 
Status
Not open for further replies.
Top