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Proposed New Jersey Regulations Governing Magnetic Fields From Electric Power Transmission Lines
Last modified on:
Thursday, March 11, 1999 11:16:42
Copyright © 1994-2008, Information Ventures, Inc.
SUBCHAPTER 44. REGULATIONS GOVERNING MAGNETIC FIELDS FROM ELECTRIC POWER TRANSMISSION LINES
7:28-44.2 Definitions
The following words and terms, when used in this
subchapter, shall have the following meanings, unless the
context clearly indicates otherwise.
- Alternating current means a periodic sinusoidal
current, alternately varying between equal positive and
negative peaks. The unit for measuring the strength of the
alternating current is the ampere (A).
- ANSI is the American National Standards Institute,
Inc.
- Anticipated average and maximum current flow means
those averages and maximum circuit currents expected as
determined from historical or special study data.
- Centerline means the real or imaginary line designating
the center of the circuit(s) comprising the electric power
transmission or subtransmission line.
Commission means the New Jersey Commission on
Radiation Protection.
- Department means the New Jersey Department of
Environmental Protection.
- Electric field means the RMS (root mean squared)
amplitude of the electric field produced by an electric power
transmission line as measured at a height of one meter above
ground level, expressed in kilovolts per meter (kV/m).
- Electric power line means transmission and other lower
voltage lines.
- Electric power distribution line for the purposes of this
subchapter, means a system of conductors used to transport
electrical energy of an alternating current at voltages equal to
or less than 26 kilovolts, at a frequency of 60 Hz, from a
source or sources of supply to other principal parts of the
system, including to consumers' service entrance equipment.
- Electric power subtransmission line for the purposes of
this subchapter, means a system of conductors used to
transport bulk electrical energy of an alternating current at
voltages equal to or greater than 26 kilovolts, but less than
100 kilovolts, and at a frequency of 60 Hz, from a source or
sources of supply to other principal parts of the system.
- Electric power transmission line for the purposes of
this subchapter, means a system of conductors used to
transport bulk electrical energy of an alternating current at
voltages of 100 kilovolts or greater and at a frequency of 60
Hertz (Hz), from a source or sources of supply to other
principal parts of the system.
- Electric power transmission or subtransmission line
owner means the legal owner of an electric power transmission
or subtransmission line.
- Exposure means an instance where a person is within the
electric and magnetic field created by an electric power
transmission, subtransmission or distribution line.
- Frequency means the number of complete cycles of
sinusoidal variations per unit of time, expressed in Hertz
(cycles per second). For electric power facilities in the United
States, the commonly used frequency is 60 Hz.
- Hertz (Hz) is the SI unit for cycles per second.
- Highest operating voltage means the maximum voltage
value set forth for a particular electric power transmission line
in Table 1, ANSI C84.1, Voltage Ratings for Electric Power
Systems and Equipment (60 Hz), latest revision, or ANSI
C92.2, Preferred Voltage Ratings for Alternating-Current
Electrical Systems and Equipment Operating at Voltages
above 230 Kilovolts Nominal, latest revision.
- IEEE means the Institute of Electrical and Electronic
Engineers, Inc.
- Kilovolt (kV) means one thousand volts.
Kilovolt per meter means a unit of measurement of
electric field strength generally measured at a point one meter
above ground and expressed as kV/m.
- Magnetic field means the RMS (root mean squared)
amplitude of the magnetic flux density produced by an electric
power line as measured one meter above ground, expressed in
gauss or tesla.
- Maximum current rating (MCR) means the maximum
quantity of electric current, expressed in amperes that can be
continuously carried by the conductors of an electrical circuit
as determined by the electrical power transmission or
subtransmission line owner.
- Modified means the alteration of a portion of an
electric power transmission or subtransmission line, said
portion having a minimum length of 0.5 mile, by
reconductoring, reinsulating or rebuilding for any reason that
may result in any change to the magnetic field arising from
electric current flow on this line after the effective date of this
rule.
- Phase means the separation in time between each
voltage with its associated current and the conductor(s) that
comprise a polyphase system. All peak voltages are equal in
magnitude as are all peak currents but each voltage/current is
displaced from the other by equal time intervals. For instance,
a three (3) phase 60 Hz system would have its
voltages/currents separated by 1/180 of a second.
- Recreational area means any area used for active, non-
occupational activities such as but not limited to playgrounds,
ball fields, tennis courts and school yards. This is not meant to
apply to passive uses such as hiking or camping.
- RMS means root-mean-squared which is the square root
of the mean of the squares of the instantaneous values for a sine
wave. For a sine wave, it is numerically equal to 0.707 of the
maximum value.
- Right-of-way (ROW) means a term used only for the
purposes of determining the appropriate points for compliance
with this rule, and not for the purpose of determining a legal
interest in the property and may mean any of the following, as
appropriate:
- (a) Land where the electric power line owner has
property interest, such as, but not limited to, an easement,
prescriptive easement, or fee simple title, and which is used
or designated for construction, operation, and maintenance of
electric power transmission lines
- (b) In areas where the electric power line owner has a
property interest as described in (a) and where such interest is
adjacent to a public road or adjacent to or within the boundary
of a property or easement of a railroad, utility pipeline,
communication line, or public utility linear facility, or
conservation zone, or canal, the ROW will be assumed to
extend to the furthermost edge of such property or easement.
- (c) In areas where the electric power line owner does not
have a property interest in the land where the electric power
transmission line is located, or where the electric power
transmission line is located in a public road, for the purpose
of this rule, the ROW will be assumed to extend 65 feet from
each outside conductor.
- (d) For electric power line crossings of public roads and
bodies of water, the ROW, for the purposes of this rule, shall
be assumed to extend 65 feet from each outside conductor.
- Standard horizontal configuration means all circuit
conductors or conductor bundles lie in a horizontal plane
perpendicular to the centerline of the transmission line.
- Standard low reactance configuration means the phases
of multiple circuits are not arranged in the same physical
positions or electrical sequence, so as to produce the
minimum circuit reactance.
- Standard superbundle configuration means the phases
of multiple circuits are arranged in the same relative positions
and electrical sequence, so as to produce the lowest voltage
gradient at the surface of the conductors.
- Voltage means the effective RMS (root mean squared)
potential difference between any two conductors or between a
conductor and ground, expressed in the unit of the volt (V).
Voltages are expressed in nominal values as set forth in Table
1, ANSI C84.1, Voltage Ratings for Electric Power Systems
and Equipment (60 Hz), latest revision, unless otherwise
indicated. The nominal voltage is the value assigned for the
purpose of convenient designation. The operating voltage may
vary above or below this value.
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