Indiana Administrative Code › Title 170 - INDIANA UTILITY REGULATORY COMMISSION › Article 4 - ELECTRIC UTILITIES › Rule 3 - Electric Supply and Signal Lines; Principles of Safety; Co-ordination with Other Utilities › Section 3-12 - Definitions

Current through July 10, 2024
Authority: IC
				  8-1-1-3;
				  IC
				  8-1-2-10
Affected: IC
				  8-1-2-5;
				  IC
				  8-1-14-1;
				  IC
				  8-3-1-1
Sec. 12.
Definitions. For the purpose of these principles and
				  practices, the following terms are used with meanings as defined below.
Inductive Co-ordination. The location, design, construction,
				  operation and maintenance of supply and signal systems in conformity with
				  harmoniously adjusted methods which will prevent inductive interference.
General Co-ordinated Methods. Those methods reasonably
				  available for general application to supply or signal systems, which contribute
				  to inductive co-ordination without specific consideration to the requirements
				  for individual inductive exposures.
Specific Co-ordinated Methods. Those additional methods
				  applicable to specific situations where general co-ordinated methods are
				  inadequate.
Inductive Interference. An effect arising from the
				  characteristics and inductive relations of supply and signal systems of such
				  character and magnitude as would prevent the signal circuits from rendering
				  service satisfactorily and economically if methods of inductive co-ordination
				  were not applied.
Inductive Exposure. A situation of proximity between supply
				  and signal circuits under such conditions that inductive interference must be
				  considered.
Inductive Susceptiveness. Those characteristics of a signal
				  circuit with its associated apparatus which determine, so far as such
				  characteristics can determine, the extent to which it is capable of being
				  adversely affected in giving service, by a given inductive field.
Inductive Influence. Those characteristics of a supply
				  circuit with its associated apparatus that determine the character and
				  intensity of the inductive field which it produces.
Inductive Coupling. The interrelation of neighboring supply
				  and signal circuits by electric or magnetic induction or both.
Circuit means a conductor or system of conductors through
				  which an electric current is intended to flow.
Signal Circuit. Any telephone, telegraph, messenger call,
				  clock, fire, police alarm, or other circuit of similar nature (with connected
				  apparatus) devoted exclusively to the transmission of signals or intelligence
				  which operates at less than 400 volts to ground, or 750 volts between any two
				  points of the circuit and the transmitted power of which does not exceed 150
				  watts. Below 150 volts no limit is placed on the power capacity of the
				  system.
Supply Circuit. A circuit (with connected apparatus) used for
				  transmitting a supply of electrical energy. Railway signal circuits above 400
				  volts to ground are always supply circuits within the meaning of these
				  principles. Signal circuits not for public use coming under the above
				  definition may be run and operated as supply circuits if desired when
				  exclusively so.
Conductor means a metallic conducting material, usually in
				  the form of a wire or cable, suitable for carrying an electric current. Does
				  not include bus bars.
Lateral Conductor means, in pole wiring work, a wire or cable
				  extending in a general horizontal direction approximately at right angles to
				  the general direction of the line conductors.
Line Conductor means one of the wires or cables carrying
				  electric current, supported by poles, towers, or other structures, but not
				  including vertical or lateral connecting wires.
Vertical Conductor means, in pole wiring work, a wire or
				  cable extending in an approximately vertical direction.
Conflicting or in Conflict (as applied to a pole line) means
				  that the line is so situated with respect to a second line (except at
				  crossings) that the overturning of the first line will result in contact
				  between its poles or conductors and the conductors of the second line, assuming
				  that no conductors are broken in either line: Provided, however, That lines on
				  opposite sides of a highway, street, or alley are not considered as conflicting
				  if separated by a distance not less than 60 per cent of the height of the
				  taller pole line, but in no case less than 20 feet.
Urban Districts means thickly settled communities (whether in
				  cities or suburbs) where congested traffic often occurs. A highway, even though
				  in the country, on which the traffic is often very heavy, is considered as
				  urban.
Rural Districts means all places not urban, usually in the
				  country but in some cases within city limits.
Guarded means covered, shielded, fenced, enclosed or
				  otherwise protected, by means of suitable covers or casings, barrier rails or
				  screens, mats or platforms, to remove the liability of dangerous contact or
				  approach by persons or objects to a point of danger.
Open Lines means overhead lines not in conduits, and
				  consisting of single conductors or of individual twisted pairs, as opposed to
				  multiple-conductor cables.
Reconstruction means replacement of any portion of an
				  existing installation by new equipment or construction. Does not include
				  ordinary maintenance replacements.
Normal Sag means the difference in elevation between the
				  highest point of support of a span and the lowest point of the conductor in the
				  span (or in the curve of the conductor in the span produced), at 60 degrees F.
				  with no wind loading.
Apparent Sag of a Span means the maximum departure of the
				  wire in a given span from the straight line between the two points of support
				  of the span, at 60 degrees F. with no wind loading. Where the two supports are
				  at the same level this will be the normal sag.
Apparent sag at any point means the departure of the wire at
				  the particular point in the span from the straight line between the two points
				  of support of the span, at 60 degrees F. with no wind loading.
Service means the connecting conductors by which a supply of
				  electrical energy is carried from a supply line to the building or premises
				  served.
Climbing Space means the vertical space reserved along the
				  side of a pole structure to permit ready access for linemen to equipment and
				  lines located on the pole structure.
Lateral Working Space means the space reserved for working
				  between conductor levels outside the climbing space, and to its right and
				  left.
Common Use means simultaneous use by two or more utilities of
				  the same kind.
Joint Use means simultaneous use by two or more kinds of
				  utilities.
Voltage or volts means the highest effective voltage between
				  any two conductors of the circuit concerned, except that in grounded multiwire
				  circuits, not exceeding 750 volts between outer conductors, it means the
				  highest effective voltage between any wire of the circuit and the
				  ground.
In ungrounded circuits not exceeding 750 volts, voltage to
				  ground means the voltage of the circuit.
When one circuit is directly connected to another circuit of
				  higher voltage (as in the case of an auto-transformer), both are considered as
				  of the higher voltage, unless the circuit of lower voltage is permanently
				  grounded. Direct connection implies electrical connection as distinguished from
				  connection merely through electromagnetic or electrostatic induction.