jasonbone
Member
- Location
- North Carolina
[FONT="]Under 2011 code I was taught to use fuse sizes (source circuits/strings) in 1 amp increments up to 10A, then 5 A increments from 15A up to 50A and so on.
Under 2014 we were told only use standard values only, and now I am taking some training on 2017 where they are stating standard values only as well.
[/FONT]
[FONT="]My issue –[/FONT]
[FONT="]Isc of module = 9.68A x 1.25 x 1.25 = 15.125A fuse[/FONT]
[FONT="] [/FONT]
[FONT="]Next standard size is 20A but module says max fuse size is 16A, so using a 20A would break listing of product and violate code.[/FONT]
[FONT="] [/FONT]
[FONT="]The way I read the code (last line of 240.6), non-standard values shall be allowed. Am I wrong in thinking I can use a 16A DC/PV rated and marked fuse in this situation?[/FONT]
Any clarification appreciated.
Under 2014 we were told only use standard values only, and now I am taking some training on 2017 where they are stating standard values only as well.
[/FONT]
[FONT="]My issue –[/FONT]
[FONT="]Isc of module = 9.68A x 1.25 x 1.25 = 15.125A fuse[/FONT]
[FONT="] [/FONT]
[FONT="]Next standard size is 20A but module says max fuse size is 16A, so using a 20A would break listing of product and violate code.[/FONT]
[FONT="] [/FONT]
[FONT="]The way I read the code (last line of 240.6), non-standard values shall be allowed. Am I wrong in thinking I can use a 16A DC/PV rated and marked fuse in this situation?[/FONT]
Any clarification appreciated.