1200 W. Washington Street

Phoenix, AZ 85007-2927


Phoenix Office: (602) 542-4251


Tucson Office: (520) 628-6550


Toll Free In-State Only:

1-(800) 222-7000

Electric Terminology

Below are definitions of terms commonly used in the electric industry. This list is not designed to be comprehensive, but rather to give a basic definition. Some of these terms have specific regulatory or technical definitions as spelled out in law or statute. In those situations, the legal or technical definition takes precedence

Arizona Power Plant and Transmission Line Siting Committee:

Bundled service:

Certificate of Convenience & Necessity (CC & N):

Competitive services:


Distribution lines:

Distribution service:

Electric Service Provider (ESP):

Environmental Portfolio Standard (EPS):

Federal Energy Regulatory Commission (FERC):


Green pricing:

Interruptible electric service:

Kilowatt (kW):

Kilowatt-hour (Kwh):

Line extension:

Master meter:

Megawatt (MW):

Meter Reading Service Provider (MRSP):

Meter reading service:

Meter Service Provider (MSP):

Meter service:


Metering and metering service:

Point of Delivery:


Residential use:

Service area:

Service line:


Transmission service:

Unbundled service:

Utility Distribution Company (UDC):


Stay Connected

Check here to sign up for Consumer Alerts from the Corporation Division. To receive alerts for your business register at eCorp.azcc.gov.Please call 602-542-3026 with questions for the Corporations Division.

Check here to sign up for Notices and Agendas for Commission Meetings, Hearings and Appearances.Please call 602-542-3931 with any questions.

Check here to receive the latest Commission News Releases and information. Please call 602-542-0728 with any questions.

Arizona Corporation Commission

1200 W. Washington Street

Phoenix, AZ 85007


Corporations Division

1300 W. Washington Street

Phoenix, AZ 85007


Tucson Office (Walk-ins only)

400 W. Congress Street

Tucson, AZ 85701