erickench
Senior Member
- Location
- Brooklyn, NY
We have an interpretation problem here. NEC 760.51(B) state's the following:
Where power-supply conductors and fire alarm circuit conductors are........
Notice it say's "fire alarm circuit conductors" and not "non-power-limited fire alarm circuit conductors". This rule is in Part II of article 760 which covers NPLFA circuits. Also, there are no derating rules in Part III of article 760 which covers PLFA circuits. My question is does this rule apply to just NPLFA or both NPLFA and PLFA circuits?
Where power-supply conductors and fire alarm circuit conductors are........
Notice it say's "fire alarm circuit conductors" and not "non-power-limited fire alarm circuit conductors". This rule is in Part II of article 760 which covers NPLFA circuits. Also, there are no derating rules in Part III of article 760 which covers PLFA circuits. My question is does this rule apply to just NPLFA or both NPLFA and PLFA circuits?