Tap a tap

[ggunn]

I have heard that you cannot tap a tap conductor, but I have not been able to locate language in the NEC that disallows it. Is it in there?

Specifically, we are looking at a service that comes into a gutter through a revenue meter and splits into three service disconnects via Polaris blocks in a gutter, and we want to add a line side connection from a PV system. The gutter is very crowded but the service discos are not. Our guy in the field would like to make our interconnection on the line side of one of the service discos between it and the Polaris blocks. Can he do that? Ampacity isn't an issue.

EDIT: I think he can, since it's not a feeder.

 

[charlie b]

I know nothing about PV installations. But I believe the tap rules in 240.21 all require the tap conductor to land on an overcurrent device.

 

[electrofelon]

I have heard that you cannot tap a tap conductor, but I have not been able to locate language in the NEC that disallows it. Is it in there?

Specifically, we are looking at a service that comes into a gutter through a revenue meter and splits into three service disconnects via Polaris blocks in a gutter, and we want to add a line side connection from a PV system. The gutter is very crowded but the service discos are not. Our guy in the field would like to make our interconnection on the line side of one of the service discos between it and the Polaris blocks. Can he do that? Ampacity isn't an issue.

EDIT: I think he can, since it's not a feeder.

I agree with you, I dont see an issue. The "you cant tap a tap" thing is for feeder taps, not service entrance conductors. For feeder taps, the NEC doesnt word it that way, but its in the beginning of 240.21 "......shall not supply another conductor except through an OCPD...."

 

[texie]

I have heard that you cannot tap a tap conductor, but I have not been able to locate language in the NEC that disallows it. Is it in there?

Specifically, we are looking at a service that comes into a gutter through a revenue meter and splits into three service disconnects via Polaris blocks in a gutter, and we want to add a line side connection from a PV system. The gutter is very crowded but the service discos are not. Our guy in the field would like to make our interconnection on the line side of one of the service discos between it and the Polaris blocks. Can he do that? Ampacity isn't an issue.

EDIT: I think he can, since it's not a feeder.

I agree, this is not a feeder-they are service conductors and these are not taps as in 240.21.