Electrical Metering Requirements and Standards in New Jersey

Electrical metering in New Jersey governs how electricity consumption is measured, recorded, and billed across residential, commercial, and industrial properties. This page covers the technical standards, regulatory framework, equipment classifications, and inspection requirements that apply to metering installations throughout the state. Accurate metering directly affects billing integrity, grid safety, and interconnection eligibility for distributed energy resources. Understanding these requirements is essential for property owners, electrical contractors, and utility customers navigating installations or upgrades.

Definition and scope

Electrical metering refers to the equipment, systems, and processes used to measure electrical energy (kilowatt-hours), demand (kilowatts), and in some cases power quality parameters at a service point. In New Jersey, metering requirements are shaped by the New Jersey Board of Public Utilities (NJBPU), the tariff schedules and service rules of the state's electric distribution companies (EDCs) — principally PSE&G, Jersey Central Power & Light (JCP&L), Atlantic City Electric, and Rockland Electric — and the technical standards of the National Electrical Code (NEC), as adopted and amended by New Jersey through the New Jersey Uniform Construction Code (UCC).

The New Jersey UCC, administered by the New Jersey Department of Community Affairs (NJDCA), adopts the NEC with state-specific amendments. NEC Article 230 covers service entrance equipment; NEC Article 240 addresses overcurrent protection upstream and downstream of the metering point. Metering enclosures, socket types, and conductor sizing must conform to both NEC requirements and the specific EDC's Tariff Electrical Requirements (TER) document. References to the NEC in this page reflect the 2023 edition of NFPA 70, effective January 1, 2023.

Scope limitations: This page addresses metering requirements under New Jersey state jurisdiction, including the NJBPU regulatory framework and NJDCA construction code requirements. Federal metering mandates under the Federal Energy Regulatory Commission (FERC) for wholesale transactions, or metering for interstate pipelines and bulk transmission assets, fall outside this scope. Private sub-metering in tenant spaces is addressed partially here but is also governed by NJBPU sub-metering rules that carry separate procedural requirements. For a broader orientation to the state's electrical regulatory environment, the regulatory context for New Jersey electrical systems page provides foundational framing.

How it works

Metering in New Jersey follows a structured sequence from service design through inspection and activation.

1. Service design and meter socket specification. The electrical contractor or engineer selects a meter socket rated for the service ampacity (commonly 100A, 200A, 320A, or 400A for residential and light commercial). Socket configurations must match the EDC's approved socket list — each utility publishes a Metering Manual or Electric Service Requirements document specifying acceptable meter socket manufacturers, jaw configurations, and sealing provisions.
2. Permit application. A permit is required through the local municipality's Construction Official under the NJDCA UCC framework before any meter socket installation or alteration. The permit triggers plan review for compliance with NEC Article 230 (service entrance) and the applicable EDC service rules.
3. Rough inspection. The local Electrical Subcode Official inspects the meter socket enclosure, grounding electrode system, and service entrance conductors prior to utility connection. Grounding requirements relevant to metering installations are detailed in the grounding and bonding requirements for New Jersey resource.
4. Utility notification and meter installation. After a successful inspection, the contractor notifies the EDC. The utility installs the revenue-grade meter — a device it owns and maintains — into the approved socket. Customers do not own the utility revenue meter.
5. Final inspection and service activation. The local authority having jurisdiction (AHJ) issues a Certificate of Approval, and the utility energizes the service.

Meter types contrast — electromechanical vs. advanced metering infrastructure (AMI):
- Electromechanical meters use induction discs rotating proportionally to energy flow. These meters are accurate to approximately ±2% under ANSI C12.1 standards but lack remote-read capability.
- AMI (smart meters) communicate interval data (typically 15-minute or 60-minute reads) to the utility via radio frequency or cellular networks. NJBPU Order Docket No. EX16050276 directed PSE&G to deploy 2.3 million AMI meters across its service territory. AMI meters must meet ANSI C12.20 accuracy standards (Class 0.2 or Class 0.5) and comply with cybersecurity requirements under NERC CIP standards for applicable assets.

For a full picture of how metering fits within the broader service delivery architecture, the conceptual overview of New Jersey electrical systems provides useful context.

Common scenarios

Residential 200A single-phase service. The most common residential metering installation in New Jersey uses a 200A, 120/240V single-phase meter socket with a 4-jaw socket configuration. The meter socket must be weatherproof, mounted between 4 feet and 6 feet above grade (per most EDC service requirement documents), and located on the exterior of the structure accessible to utility personnel.

Commercial three-phase metering. Commercial services above 200A typically require three-phase, 4-wire (208Y/120V or 480Y/277V) metering. Services above a threshold — commonly 200A at 480V or higher, depending on the EDC — may require current transformer (CT) metering rather than a self-contained socket meter. CT metering uses instrument-grade transformers to step down high current to 5-ampere secondary circuits that the meter reads; this equipment requires a separate CT cabinet and metering panel.

Solar and distributed generation interconnection. Net metering under NJBPU Net Metering rules (N.J.A.C. 14:8-4) requires a bi-directional meter or two separate meters to record both import and export energy. The New Jersey solar and battery storage electrical page covers interconnection metering in greater detail. Installations under the New Jersey electrical utility interconnection framework must also satisfy the EDC's Interconnection Technical Requirements.

Multifamily and sub-metering. Buildings with master-metered utility service may install sub-meters in individual tenant units under NJBPU sub-metering rules. Sub-meters in New Jersey must meet ANSI C12.1 accuracy standards, and sub-metering operators are subject to NJBPU billing regulation. The New Jersey electrical for multifamily housing page addresses the permitting dimension of these installations.

Temporary service metering. Construction sites and temporary installations require a temporary meter socket meeting the same EDC socket specifications as permanent service. The temporary electrical service in New Jersey framework covers permit and duration requirements.

Decision boundaries

Selecting the correct metering approach depends on four primary variables: service voltage, service ampacity, generation/storage presence, and ownership structure (tenant vs. owner-occupied).

Permit requirements are non-negotiable: any meter socket installation, replacement, or modification requires a permit under the NJDCA UCC regardless of whether the work is classified as new construction or renovation. The New Jersey electrical inspection process page describes how AHJ inspections are sequenced relative to utility coordination. Work performed without permits carries documented consequences detailed in New Jersey electrical work without permit consequences.

When an installation involves load calculations to determine service size — and therefore meter socket rating — the load calculation concepts for New Jersey resource addresses NEC Article 220 methodology applicable to sizing decisions.

The New Jersey Board of Examiners of Electrical Contractors sets licensing requirements for contractors performing meter socket and service entrance work. Only licensed electrical contractors may pull permits for metering-related service work in New Jersey under N.J.S.A. 45:5A, the Electrical Contractors Licensing Act. A complete index of New Jersey electrical topics is accessible from the New Jersey Electrical Authority home page.

References

• New Jersey Board of Public Utilities (NJBPU)
• New Jersey Department of Community Affairs — Uniform Construction Code
• NFPA 70 — National Electrical Code (NEC), 2023 Edition
• ANSI C12.1 — American National Standard for Electric Meters: Code for Electricity Metering
• [ANSI C12.20 — Electricity