Line Side Tapping with piercing conductors on two hots and neutral service conductors

[Matu]

We are looking to install a solar system on a clients roof and line side tapping their main service panel to feed, but their neutral bus bar is full.
We rarely run into this type of setup, and are looking to tap this within the panel itself.
Can we tap our (technically new) solar service conductors from a fused disconnect onto their neutral line as well?

 

[electrofelon]

We are looking to install a solar system on a clients roof and line side tapping their main service panel to feed, but their neutral bus bar is full.
We rarely run into this type of setup, and are looking to tap this within the panel itself.
Can we tap our (technically new) solar service conductors from a fused disconnect onto their neutral line as well?

I dont see why not.

 

[don_resqcapt19]

If this is a tap on the line side of the service disconnect, some utilities have rules that prohibit the use of those connectors on the line side of the service disconnect. Check with your utility before making the installation using insulation piercing connectors.

 

[electrofelon]

If this is a tap on the line side of the service disconnect, some utilities have rules that prohibit the use of those connectors on the line side of the service disconnect. Check with your utility before making the installation using insulation piercing connectors.

I think you also mentioned this previously Don, but isn't there a new or proposed code requiring connectors on service conductors be listed for such use?

 

[don_resqcapt19]

I think you also mentioned this previously Don, but isn't there a new or proposed code requiring connectors on service conductors be listed for such use?

The 2020 code says this:

230.46 Spliced and Tapped Conductors.

Service-entrance conductors shall be permitted to be spliced or tapped in accordance with 110.14, 300.5(E), 300.13, and 300.15. Power distribution blocks, pressure connectors, and devices for splices and taps shall be listed. Power distribution blocks installed on service conductors shall be marked “suitable for use on the line side of the service equipment” or equivalent.

Effective January 1, 2023, pressure connectors and devices for splices and taps installed on service conductors shall be marked “suitable for use on the line side of the service equipment” or equivalent.

However even if the insulation piercing connectors are listed for use on the line side of service equipment, that would not act to change a power company rule that says you cannot use that type of connection.

 

[Matu]

Sounds good all, thank you for your input! We will be contacting our utility company for further details.