Public Service Company of North Carolina (PSNC Energy) Rate Selection Guide
Public Service Company of North Carolina (PSNC Energy), now operating as Enbridge Gas North Carolina after Enbridge's October 2024 acquisition, is an investor-owned natural gas distributor serving roughly 347,000 customers and regulated by the North Carolina Utilities Commission. It offers strong programmatic access via EDI (ANSI X12 810/820), an Electronic Bulletin Board for large transportation customers, and an announced Green Button Connect My Data rollout.
Public Service Company of North Carolina (PSNC Energy) Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| Rate 125 - Small General Service | Commercial | $21.00/mo + $1.17267-$1.04660/therm (declining block) | Small commercial sales-service customers |
| Rate 140 - Medium General Service | Commercial | $100.00/mo + $1.00947 / $0.94619 per therm | Mid-size commercial with higher volume |
| Rate 145 - Large-Quantity General Service | Industrial | $400.00/mo + $0.82722-$0.67919/therm (declining block) | Large-volume C&I sales-service customers |
| Rate 175 - Firm Transportation | Industrial | $400.00/mo + $0.21027-$0.07529/therm transportation | Large customers procuring their own gas supply |
| Rate 180 - Interruptible Transportation | Industrial | $700.00/mo + $0.15584-$0.02882/therm | Interruptible large customers procuring own supply |
Market Overview
North Carolina gas distribution is regulated by the North Carolina Utilities Commission. PSNC/Enbridge Gas is the regulated distributor; sales-service rates (125-150) are NCUC-approved. Large customers may instead take transportation service (Rate 175/180) and arrange their own gas supply through shippers/marketers, but distribution remains regulated.
Need to pull your actual usage data to compare rates? See the Public Service Company of North Carolina (PSNC Energy) Data Access Guide →
Current Rate Schedules
Current rates are set in the Summary of Rates and Charges effective June 1, 2026, issued under NCUC Docket No. G-5, Sub 698. All charges combine a fixed monthly Facilities Charge with per-therm Energy (or Transportation) Charges; larger schedules use declining-block per-therm rates. Rates shown exclude applicable taxes.
Effective: June 1, 2026 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| Rate 125 - Small General Service | commercial | Small commercial sales-service customers. | Facilities Charge $21.00/month; Energy Charge $1.17267/therm first 500, $1.10963/therm next 4,500, $1.04660/therm all over 5,000. (Effective 6/1/2026, NCUC G-5 Sub 698; excludes taxes.) | — |
| Rate 140 - Medium General Service | commercial | Mid-size commercial sales-service customers. | Facilities Charge $100.00/month; Energy Charge $1.00947/therm first 1,000, $0.94619/therm all over 1,000. (Effective 6/1/2026; excludes taxes.) | — |
| Rate 145 - Large-Quantity General Service | industrial | Large-volume commercial and industrial sales-service customers. | Facilities Charge $400.00/month; declining-block Energy Charge from $0.82722/therm (first 15,000) down to $0.67919/therm (all over 1,060,000). (Effective 6/1/2026; excludes taxes.) | — |
| Rate 150 - Large-Quantity Interruptible C&I Service | industrial | Large-volume commercial and industrial customers accepting interruptible service. | Facilities Charge $700.00/month; declining-block Energy Charge from $0.74259/therm (first 15,000) down to $0.61453/therm (all over 600,000). (Effective 6/1/2026; excludes taxes.) | — |
| Rate 175 - Firm Transportation Service | industrial | Customers qualifying for Rate 145 who arrange their own gas supply (firm transportation). | Facilities Charge $400.00/month; declining-block Transportation Charge from $0.21027/therm (first 15,000) down to $0.07529/therm (all over 1,060,000). (Effective 6/1/2026; excludes taxes.) | — |
| Rate 180 - Interruptible Transportation Service | industrial | Customers qualifying for Rate 150 who arrange their own gas supply (interruptible transportation). | Facilities Charge $700.00/month; declining-block Energy Charge from $0.15584/therm (first 15,000) down to $0.02882/therm (all over 600,000). (Effective 6/1/2026; excludes taxes.) | — |
Rate Recommendations by Use Case
Large industrial facility with own gas supply
Move to transportation service to cut the per-therm distribution charge.
Transportation rates ($0.07-$0.21/therm on 175) are far below the bundled sales energy charge ($0.68-$0.83/therm on 145) because the commodity is procured separately.
- Secure a gas supply/shipper arrangement before switching
- Enroll in the EBB for daily meter and imbalance data
- Consider Rate 180 if you can tolerate interruption for lower rates
Mid-size commercial sales customer
Confirm placement on Rate 140 vs 145 based on annual therm volume.
Rate 145's declining blocks ($0.82722 down to $0.67919/therm) beat Rate 140 at higher volumes despite a higher $400 facilities charge.
- Compare annual therms against the block thresholds
- Factor the $100 vs $400 monthly facilities charge into the breakeven
- Use 24-month My Account history to project volume
Aggregator / billing service provider
Use EDI 810 plus customer authorization forms for scalable billing data access.
EDI is the mature programmatic channel today; a Third Party EDI Agreement plus per-customer authorization forms enables automated multi-account billing retrieval.
- Obtain a DUNS number and EDI translation software
- Sign the Third Party EDI Agreement (1-800-545-4427)
- Collect a Customer Authorization Form per account
- Plan to adopt Green Button CMD when it launches
Energy manager needing daily usage data
Enroll qualifying large accounts in the Electronic Bulletin Board for daily readings.
The EBB is the only current source of daily meter, measurement, and imbalance data, which is essential for managing transportation nominations and avoiding imbalance penalties.
- Submit the EBB Access Authorization Form to NCTransAdmin@DominionEnergy.com
- Subscribe to daily meter-reading emails
- Monitor imbalance and cash-out pricing to avoid penalties
Historical Rate Trends
PSNC/Enbridge Gas North Carolina rates are set by the NCUC and adjusted through rate cases and periodic cost-of-gas/rider updates. The current Summary of Rates and Charges is effective June 1, 2026 under Docket G-5, Sub 698. Five years of archived rate summaries are published on the tariff page.
June 1, 2026
Current Summary of Rates and Charges took effect under NCUC Docket G-5, Sub 698.
see docketOverall trend: Periodic adjustments via NCUC rate cases and gas-cost riders; current rates effective June 2026.
Next expected change: At the next NCUC rate case or scheduled cost-of-gas adjustment; specific date not published as of mid-2026.
Cost Optimization Strategies
For C&I gas customers, the biggest levers are choosing the correct rate schedule for annual volume and evaluating transportation service for large loads with their own supply or interruption tolerance.
Right-size the rate schedule
For: All C&I sales customers
Match annual therm volume to the appropriate sales schedule (125/140/145) to capture declining-block pricing as volume rises.
Evaluate transportation service
For: Large C&I customers with supply arrangements
Large customers procuring their own gas can move to Rate 175 (firm) or 180 (interruptible), where per-therm charges are far lower because commodity cost is separate.
Consider interruptible service
For: Customers tolerant of curtailment
Facilities with dual-fuel capability or curtailable load can take interruptible Rate 150/180 for lower per-therm pricing.
Automate with EDI / EBB monitoring
For: Business and large transportation customers
Use EDI 810 to streamline invoice processing and the EBB daily meter feed to detect anomalies and manage imbalance charges.
To implement these strategies, you need your 15-minute interval data. Learn how to download Public Service Company of North Carolina (PSNC Energy) interval data →
Frequently Asked Questions
What programmatic options exist for C&I gas billing data?▾
EDI (ANSI X12 Transaction Set 810) is the primary automated channel for business billing data, with EDI 820 available for ACH payments. Large transportation customers can also pull daily meter and measurement data from the Electronic Bulletin Board. A Green Button Connect My Data API is announced for North Carolina in the 2026-2027 timeframe.
How does a consultant or aggregator get authorized for a customer's data?▾
The customer completes the PSNC Customer Authorization Form specifying which accounts and data categories (usage history, billing records) the third party may access; both parties sign and submit it to PSNC Transportation & Administration. Aggregators additionally sign a Third Party EDI Agreement. Activation takes about 3-5 business days.
Can large industrial customers get daily interval meter data?▾
Yes. Large transportation customers (typically on Rate 175 or 180) use the Electronic Bulletin Board to access daily meter readings, measurement, imbalance, and nomination data, and can subscribe to daily meter-reading emails. Sub-daily interval data is not yet generally available.
How long does EDI 810 billing setup take?▾
Allow 3-5 business days from agreement to configuration, plus 1-2 weeks for testing and certification before production go-live. You will need EDI software supporting ANSI X12 UIG Transaction Set 810 and a DUNS number.
Which rate schedules apply to commercial and industrial gas customers?▾
C&I sales customers use Rate 125 (Small General Service), Rate 140 (Medium General Service), Rate 145 (Large-Quantity General Service), and Rate 150 (Large-Quantity Interruptible). Transportation customers use Rate 175 (firm) and Rate 180 (interruptible). All are published in the current Summary of Rates and Charges.
How far back can I access historical usage data?▾
My Account provides 24 months of billing and usage history. The tariff page provides 5 years of archived rate summaries, and the EBB retains real-time plus roughly 180 days of measurement data for large customers.
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