Glossary of Terms For the Electric Utility Industry

Glossary of Terms For the Electric Utility

Industry

Revised June 1, 2019

10BaseT ? A synonym for the Fast Ethernet network standard. The "10" refers to a maximum data-transfer rate of 10 megabits per second over twisted pair, copper wire.

10K A grade level Box or Cover rating. See "Incidental Light Traffic".

1A 1 Normally Open

1B 1 Normally Closed

20A A California ruling that has the investor owned utilities performing the undergrounding of electrical cables. The funds to perform the work are derived from rates and go into a sinking fund that is used at the discretion of the municipality the electric line is in.

20B A California ruling that has the investor owned utilities performing the undergrounding of electric cables. The funds to perform this work are derived from a combination of rates and the developer of the land the line is on. This work is done at the discretion of the municipality the electric line is in.

20C A California ruling that has the investor owned utilities performing the undergrounding of overhead electrical cables. The funds to perform this work are derived from the developer of the land the line is on.

20K A grade level Box or Cover rating. See "Occasional Traffic".

2S1W Two Speeds, 1 winding (motor).

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2S2W Two Speed, 2 winding (motor).

2-Wire A pulse transmission system that uses 2 wires and usually transmits positive-going pulses of some duration with a rest (or zero voltage level) between pulses. Historically, this type of pulse system lacked immunity to induced noise. Filtering techniques of the receiving equipment will determine noise immunity. "2-Wire" is usually synonymous "Form A" in pulse metering is represented as a SPST-NO switch configuration.

3-Wire A pulse transmission system that employs 3 wires and has a signal on the common to one of the two contacts at all times, but never simultaneously to both. This type of system is much less prone to noise than a 2-wire system because a signal is always present. "3-Wire" is usually synonymous "Form C" in pulse metering and is represented as a SPDT switch configuration.

3 Phase See "Three Phase" and "Polyphase"

600 Volt Electrical systems, cables or service designed to be operated under 1000 Volts.

600V-UD 600 Volt Underground Distribution Cable.

802.11a A specification for a wireless LAN that operates in the 5GHz frequency range and provides a data transmission rate of 54Mbps using spread spectrum technology.

802.11b A specification for a wireless LAN that operates in the 2.4GHz range and provides a data transmission rate of 11Mbps using spread spectrum technology. This specification was known as Wi-Fi but the term now applies to 802a and 802g as well.

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802.11g A specification for a wireless LAN that operates in the 2.4GHz frequency range and provides a data transmission rate, over short distances, of 54Mbps using orthogonal frequency division multiplexing (OFDM) technology.

802.1x A security standard for wired and wireless LANs.

A

A 1) Amperes; Amps. 2) Area. For cables Area is expressed in Circular Mils.

A-H Ampere-Hour

A/D Conversion ? The process of converting an analogue signal into an equivalent digital one utilizing an A/D converter.

AA 1) The Aluminum Association. 2) Refers to All Aluminum as in All Aluminum Conductor.

AAAC All Aluminum Alloy Conductor

AAC All Aluminum Conductor.

AAC/TW All Aluminum Conductor, Trapezoidal-Shaped Aluminum Strands.

AASHTO American Association of Safety Highway Traffic Officials

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Absorbed Glass Mat ? Absorbed Glass Mat, also known as AGM, is a newer type of battery construction that uses saturated absorbent glass mats rather than gelled or liquid electrolyte. It is somewhat more expensive than flooded (liquid) type.

AC See "Alternating Current"

ACAR All Aluminum Conductor, Aluminum Alloy Reinforced.

ACB Air Circuit Breaker

Access Point ? A wireless networked device usually connected to a wireless LAN used to access the wired LAN.

Accuracy The degree of uncertainty for which a measured value agrees the ideal value.

Accuracy Class ? A number used to indicate the accuracy range of a measurement transducer, according to the defined standard.

ACSR Aluminum Conductor Steel Reinforced.

ACSR/AW Aluminum Conductor, Aluminum Clad Steel Reinforced.

ACSR/TW ? ACSR conductor made using Trapezoidal Wire construction.

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