695.6(d) Exception No. 2.
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charlie
Senior Member
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- Indianapolis
Re: 695.6(d) Exception No. 2.
Not in my opinion.
Not in my opinion.
Re: 695.6(d) Exception No. 2.
Charlie,
Could you elaborate. The exception says installed in accordance with 695.6(b) or protected in accordance with 430.52.
If the code already requires these conductors to be installed in accordance with 695.6(b)without exception, doesn't that make the "protected in accordance with 430.52" reference in 695.6(d) Exception No. 2 a moot point?
Charlie,
Could you elaborate. The exception says installed in accordance with 695.6(b) or protected in accordance with 430.52.
If the code already requires these conductors to be installed in accordance with 695.6(b)without exception, doesn't that make the "protected in accordance with 430.52" reference in 695.6(d) Exception No. 2 a moot point?
Re: 695.6(d) Exception No. 2.
This exception is new to the 2002 NEC. The reason for this exception is that where an on-site sand-by generator can provide continuous current more than 225% of the full load amps of the fire pump, the pump conductors could be the source of a fire and pose a risk to the premises. It was noted in the substantiation to the proposal that when this occurs the amount of current continously available usually far exceeds 225% of the FLA. Note that NFPA-20 and the NEC do not require OCP for conductors from an alternate source when the alernate source is an on-site generator.
The application of this exception provides an option to the installer (where all conditions are met) to either install the conductors in accordance with 695.6(B) or the installer is permitted to protect the conductors in accordance with 430.52.
This exception is new to the 2002 NEC. The reason for this exception is that where an on-site sand-by generator can provide continuous current more than 225% of the full load amps of the fire pump, the pump conductors could be the source of a fire and pose a risk to the premises. It was noted in the substantiation to the proposal that when this occurs the amount of current continously available usually far exceeds 225% of the FLA. Note that NFPA-20 and the NEC do not require OCP for conductors from an alternate source when the alernate source is an on-site generator.
The application of this exception provides an option to the installer (where all conditions are met) to either install the conductors in accordance with 695.6(B) or the installer is permitted to protect the conductors in accordance with 430.52.
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