NFPA 72

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robfree67

New member
According to NFPA 72, what are the differnces i wiring/conduit between style 4, 6, and 7?

Also,
According to NFPA 72 what are the differences in functionality between style 4, 6, and 7? HELP PLEASE!!!
 

Stallzer

Member
Location
MN
Didn't NFPA 72 2010 do away with Circuit styles ? I was under the assumption they went back to Class only.
 

nhfire77

Senior Member
Location
NH
According to NFPA 72, what are the differnces i wiring/conduit between style 4, 6, and 7?

Also,
According to NFPA 72 what are the differences in functionality between style 4, 6, and 7? HELP PLEASE!!!
In the 2010 it's just class a or b.


Essentially:

Style 4 =class B

Style 6 = class A

Style 7= class A with isolator modules in between every device.
 
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