Maximum breake size for small wires

[PhaseShift]

I believe there is a section in the code that requires that #14AWG shall be protected by a breaker that is no larger than 15A, a #12 is protected by no larger than 20A, and #10 is protected by no larger 30A.

Is this a requirement for most applications? Does it matter what kinds of loads the circuits are serving?

For instance if I have a #14 being used for control circuits should it still be protected by a maximum of 15A?

Is #14 the smallest wire size that can be used to feed loads?

 

[iwire]

There is a rule, 240.4(D) off the top of my head but it does not apply to all circuits. Motors are type of load the rule does not apply to.

 

[augie47]

I believe there is a section in the code that requires that #14AWG shall be protected by a breaker that is no larger than 15A, a #12 is protected by no larger than 20A, and #10 is protected by no larger 30A.?

No Code section could ever be that simple
240.4(D) with exceptions. As Bob noted, motors for one.

Is this a requirement for most applications? Does it matter what kinds of loads the circuits are serving??

Most, but not all. see 240.4 1st paragraph

For instance if I have a #14 being used for control circuits should it still be protected by a maximum of 15A??

Normally. Some exceptions in Art 430 part VI

Is #14 the smallest wire size that can be used to feed loads?

Branch circcuit consductors, yes, but other loads Not necessarily see 240.4