Section 220.80 Surface High-Voltage Distribution

Section 220

Section 220.80  Surface

High-Voltage Distribution

a)         High-voltage circuits; protective devices.

1)         Circuit breakers protecting high-voltage circuits supplying

power to portable or mobile equipment must:

A)        be properly tested and maintained in accordance with this

Section;

B)        have adequate interrupting capacity for the circuit application

as rated by the manufacturer;

C)        be equipped with devices for protection against;

i)          short

circuit,

ii)         overload,

iii)        grounded phase, and

iv)        undervoltage unless protection against undervoltage is

provided on board the portable or mobile equipment receiving power from the

circuit. A magnetic starter, which opens upon and must be reset manually

following a loss of power, satisfies the undervoltage requirement.

2)         High-voltage circuits supplying power to stationary equipment

must be protected from an overload or short circuit by a circuit breaker or

fuses of the correct type and capacity. Circuit breakers must, in addition, on

solidly grounded or resistance grounded systems, deenergize the circuit on the

occurrence of a phase-to-ground fault.

3)         Circuit breakers and fuses must have adequate interrupting

capacity rated to clear the short circuit current of the system.  All

electrical components and devices must be rated for the normal voltage and

current of the system.

b)         Monthly testing, examination, and maintenance of circuit

breakers; procedures; high-voltage.

Circuit

breakers and auxiliary devices located on the surface protecting surface or

underground circuits, or both, must be examined and tested at least once (1)

each month by a person qualified to perform testing and calibration, or

qualified to perform electrical work under Section 220.50(e)

Monthly testing, examination, and maintenance of circuit

breakers; procedures; high-voltage.

Circuit

breakers and auxiliary devices located on the surface protecting surface or

underground circuits, or both, must be examined and tested at least once (1)

each month by a person qualified to perform testing and calibration, or

qualified to perform electrical work under Section 220.50(e).

1)         The examination must include observations of all readily

accessible components of the circuit breaker and its auxiliary devices, and the

manual activating of any of the auxiliary devices causing circuit breakers to

operate. Examination of oil circuit breakers must include visual observation of

all external components of the circuit breaker, including excessive oil

spillage and/or the oil level of the tank. Repairs or adjustments as are

indicated by such tests and examinations must be carried out immediately.

2)         Tests must include:

A)        Breaking continuity of the ground check conductor where ground

check monitoring is used, and

B)        Actuating any auxiliary protective relays.

C)        Actual system trips during the inspection interval may be used

in place of the test specified in subsections (b)(2)(A) and (B) where such

actual operations are maintained as part of the records.

3)         The operator must maintain written records of each test,

examination, repair, or adjustment of all circuit breakers protecting

high-voltage circuits. Such records must be kept in a book containing the

following information:

A)        The name of the person making the inspection;

B)        The equipment inspected;

C)        The inspected equipment's location;

D)        The date of inspection;

E)        The problems discovered and their corrections;

F)         The signature of the supervisor of the person inspecting the

equipment.

c)         Annual testing, examination, and maintenance of circuit

breakers; procedures; high-voltage

name of the person making the inspection;

B)        The equipment inspected;

C)        The inspected equipment's location;

D)        The date of inspection;

E)        The problems discovered and their corrections;

F)         The signature of the supervisor of the person inspecting the

equipment.

c)         Annual testing, examination, and maintenance of circuit

breakers; procedures; high-voltage.

Circuit

breakers and auxiliary devices located on the surface protecting surface or

underground circuits, or both, must be tested and calibrated at the time of

installation and at least annually thereafter by a person qualified to perform

testing and calibration or qualified to perform electrical work under Section

220.50(e).

1)         The annual test and examination must include:

A)        In resistance grounded systems:

i)          Operation of the circuit breaker by passing a sufficient

amount of current through the ground fault current sensing circuit to trip the

circuit breaker. The ground resistor must be checked for continuity and ohmic

value,

ii)         If ground check monitoring is used, tripping the circuit

breaker by breaking continuity of the ground check conductor, or using the

manufacturer's recommended test,

iii)        Verifying all current transformer secondary circuits,

iv)        Verifying the operation and calibration of all over-current

trip devices or relays,

v)         Verifying the operation of the circuit breaker trip system,

and

vi)        Verifying the operation of under-voltage devices where their use

is required under subsection (a)(1)

r, or using the

manufacturer's recommended test,

iii)        Verifying all current transformer secondary circuits,

iv)        Verifying the operation and calibration of all over-current

trip devices or relays,

v)         Verifying the operation of the circuit breaker trip system,

and

vi)        Verifying the operation of under-voltage devices where their use

is required under subsection (a)(1).

B)        In ungrounded and solidly grounded systems:

i)          If ground check monitoring is used, tripping the circuit

breaker by breaking continuity of the ground check conductor, or using the

manufacturer's recommended test,

ii)         Verifying the operation of all current transformer secondary

circuits,

iii)        Verifying the operation and calibration of all over-current

trip devices or relays,

iv)        Verifying the operation of the circuit breaker trip system,

and

v)         Verifying the operation of under-voltage devices where their

use is required under subsection (a)(1).

2)         Repairs, calibrations, or adjustments indicated as necessary

by the examination and test required in subsection (c) must be carried out

before being returned to service.

3)         Calibrations must include adjusting all relays and associated

components according to manufacturer's specifications.

4)         An authorized representative of the Department may require

additional testing or calibration of circuit breakers and auxiliary devices

when it is necessary to protect the health, safety and welfare of the miners.

Examples of conditions for which the Department may require additional testing

or calibration include the finding of any present or repeated dangerous

conditions or malfunctions, incomplete or inadequate recordkeeping, or any

indication that procedures have not been followed.

5)         The operator must maintain written records of each test,

examination, repair, or adjustment of all circuit breakers protecting

high-voltage circuits

rtment may require additional testing

or calibration include the finding of any present or repeated dangerous

conditions or malfunctions, incomplete or inadequate recordkeeping, or any

indication that procedures have not been followed.

5)         The operator must maintain written records of each test,

examination, repair, or adjustment of all circuit breakers protecting

high-voltage circuits. Such records must be kept in a book containing the

following information:

A)        The name of the person making the inspection;

B)        The equipment inspected;

C)        The inspected equipment's location;

D)        The date of inspection;

E)        The problems discovered and their corrections;

F)         The signature of the supervisor of the person inspecting the

equipment.

d)         Grounding resistors.

The grounding

resistor, where required must be of the proper ohmic value to limit the voltage

drop in the grounding circuit external to the resistor to not more than one

hundred (100) volts under ground fault conditions.  The grounding resistor

shall be rated for maximum fault current continuously and insulated from ground

for a voltage equal to the phase-to-phase voltage of the system.

e)         Grounding resistors; continuous current rating.

The ground

fault current rating of grounding resistors must meet the "extended time

rating" set forth in Institute of Electrical and Electronics Engineers,

Inc., 345 E. Forty-Seventh Street, New York City, New York 10017, Standard No.

32 (1972, reaffirmed in 1984) (The reference does not include any later

amendments or editions.)

f)         Protection of high-voltage circuits; neutral grounding

resistors.

1)         High-voltage circuits supplying portable or mobile equipment

must contain either a direct or derived neutral which must be grounded through

an extended time grounding resistor at the source transformers

rd No.

32 (1972, reaffirmed in 1984) (The reference does not include any later

amendments or editions.)

f)         Protection of high-voltage circuits; neutral grounding

resistors.

1)         High-voltage circuits supplying portable or mobile equipment

must contain either a direct or derived neutral which must be grounded through

an extended time grounding resistor at the source transformers.

2)         A grounding circuit, originating at the grounded side of the

grounding resistor, must extend along with the power conductors and serve as a

grounding conductor for the frames of all high-voltage equipment supplied power

from that circuit.

3)         The grounding circuit conductor must conform to Section

220.70(c).

4)         High-voltage stationary equipment may be served from impedance

grounded, solidly grounded or ungrounded systems.

5)         Grounding transformers, where used to derive a neutral, must:

A)        be rated for continuous phase-to-ground fault current

operation; and

B)        be located at the transformers supplying power to the circuit.

g)         High-voltage cables; minimum design requirements.

1)         Cables used in high-voltage systems must be equipped with

metallic shielding around each power conductor with one (1) or more grounding

conductors having a total cross-sectional area of not less than one-half (½)

the power conductor.  The metallic shielding must completely enclose each

individual conductor or must meet the requirements for shielding set forth in

Standard WC8 of the Insulated Cable Engineers Association-National Electrical

Manufacturers' Association, 2101 L. Street, N.W., Washington, D.C.  20037 for

type SH or SHD portable power cables (The reference to Standard WC8 is as

revised July 1987 and does not include any later revisions or amendments).

Cables used as trailing cables must contain an insulated conductor for the

ground continuity check circuit if the circuit requires a conductor

ation-National Electrical

Manufacturers' Association, 2101 L. Street, N.W., Washington, D.C.  20037 for

type SH or SHD portable power cables (The reference to Standard WC8 is as

revised July 1987 and does not include any later revisions or amendments).

Cables used as trailing cables must contain an insulated conductor for the

ground continuity check circuit if the circuit requires a conductor.

2)         All high-voltage cables must be rated for the intended current

and voltage.  Splices made in such cables must provide continuity of all

components and must meet the requirements of Section 220.60(e).

h)         Cable couplers and connection boxes; minimum design

requirements.

1)         Cable couplers; requirements.

A)        Couplers that are used in medium or high-voltage power circuits

must be of the three (3)-phase type and enclosed in a full metallic shell.

B)        Cable couplers must be rated for the intended current and

voltage.

C)        The metallic shell of cable couplers must be grounded to the

grounding conductor in the cable.

D)        Couplers must be constructed in such manner so that the ground

check monitoring conductor when required will break first and the grounding

conductor will break last when being uncoupled.

2)         Connection Boxes

A)        Cable connection boxes must be designed and constructed to

guard all energized parts from personal contact.

B)        The box lid/plate/ door must be interlocked so that the circuit

will be deenergized when opened.

C)        The current-carrying parts must be deenergized and discharged

before performing any work inside such boxes, unless the particular load

carrying cable is in an isolated compartment from the rest of the connection

box. In this case, only the load carrying cable need be deenergized to be

worked on or removed. While deenergizing and discharging the box, protective

gloves must be worn.

i)          Connection of single-phase loads

e deenergized and discharged

before performing any work inside such boxes, unless the particular load

carrying cable is in an isolated compartment from the rest of the connection

box. In this case, only the load carrying cable need be deenergized to be

worked on or removed. While deenergizing and discharging the box, protective

gloves must be worn.

i)          Connection of single-phase loads.

Single-phase

loads must be connected phase-to-phase in resistance grounded systems.

j)          Installation of high-voltage transmission cables.

High-voltage

transmission cables must be installed or placed so as to afford protection

against damage.  They must be placed to prevent contact with low-voltage or

communication circuits.

k)         High-voltage power lines; clearances above ground.

High-voltage

power lines located above driveways, haulageways, and railroad tracks must be

installed so as to provide the minimum vertical clearance as specified in Rule

232 of the National Electrical Safety Code published by the Institute of

Electrical and Electronics Engineers, Inc., 345 E. 47th Street, New York, New

York 10017 (1981). (The reference does not include any later amendments or

editions.); provided, however, that in no event shall any high-voltage power

line be installed less than fifteen (15) feet above ground, walkways, or

working areas.

l)          Booms and masts; minimum distance from high-voltage lines.

The booms and

masts of equipment operated on the surface of any coal mine must not be

operated within ten (10) feet of an energized overhead powerline.  Where the

voltage of overhead powerlines is sixty-nine thousand (69,000) volts, or more,

the minimum distance from the boom or mast must be as follows:

Nominal

Powerline Voltage

(In

1,000 volts)

Minimum

Distance

Feet

69-114

12

115-229

15

230-499

25

500

or more

35

m)        Movement of equipment:  minimum distance from high-voltage

lines

hin ten (10) feet of an energized overhead powerline.  Where the

voltage of overhead powerlines is sixty-nine thousand (69,000) volts, or more,

the minimum distance from the boom or mast must be as follows:

Nominal

Powerline Voltage

(In

1,000 volts)

Minimum

Distance

Feet

69-114

12

115-229

15

230-499

25

500

or more

35

m)        Movement of equipment:  minimum distance from high-voltage

lines.

When any part

of any equipment operated on the surface of any coal mine is required to pass

under or by any energized high-voltage power line and the clearance between

such equipment and powerline is less than that specified in subsection (l) for

booms and masts, such power lines must be deenergized or other precautions must

be taken.

n)         Operating of rear dump trucks under powerlines.

In cases where

dump trucks are operated under powerlines, the minimum vertical clearance that

must be maintained over dumping areas, must be five (5) feet more than the

maximum height of the truck bed measured with the truck bed in the extreme

raised position.

o)         Disconnecting devices.

Disconnecting

devices must be installed at the beginning of each branch line in high-voltage

circuits, except disconnecting devices in high-voltage transmission lines,

which must be accessible and located as near as practicable to the entrance to

the high-voltage stationary installations supplied from the overhead

powerlines, and must be equipped or designed in such manner that it can be

determined by visual observation that the circuit is deenergized when such

devices are open.

p)         Identification of circuit breakers and disconnecting switches.

Circuit

breakers and disconnecting switches must be labeled to show which units they

control, unless identification can be made readily by location.

q)         High-voltage equipment grounding.

Low resistance

ground fields used in high-voltage systems serving portable or mobile equipment

must be separated from the other ground fields by twenty-five (25) feet or

more

nd disconnecting switches.

Circuit

breakers and disconnecting switches must be labeled to show which units they

control, unless identification can be made readily by location.

q)         High-voltage equipment grounding.

Low resistance

ground fields used in high-voltage systems serving portable or mobile equipment

must be separated from the other ground fields by twenty-five (25) feet or

more.

r)          Movement of portable substation and transformers.

Portable

substations, transformers, and high-voltage switch gear must be deenergized

before they are moved from one location to another, and must be examined by a

qualified person under Section 220.50(e) to assure safe operating condition

prior to reenergization.

s)         Performing work in proximity to energized high-voltage circuits.

Work must not

be performed within four (4) feet of any exposed energized high-voltage

conductor unless the provisions of subsections (v) through (dd) have been

complied with, with respect to guarding of all energized conductors; except

that, a person qualified under Section 220.50(e) and wearing protective

lineman's gloves rated for the phase-to-phase voltage of the system, may

disconnect and connect conductors to the load side of opened fused cutouts or

disconnecting switches.

t)          Work on high-voltage line; deenergizing and grounding.

High-voltage

lines must be deenergized and grounded before work is performed on them, except

that repairs may be permitted on energized high-voltage line if:

1)         Such repairs are made by a qualified person under subsection

(ff) in accordance with procedures and safeguards set forth in subsection (u)

through (dd) as applicable; and

2)         The operator has tested and properly maintained the protective

devices necessary in making such repairs.

u)         Work on high-voltage line

at repairs may be permitted on energized high-voltage line if:

1)         Such repairs are made by a qualified person under subsection

(ff) in accordance with procedures and safeguards set forth in subsection (u)

through (dd) as applicable; and

2)         The operator has tested and properly maintained the protective

devices necessary in making such repairs.

u)         Work on high-voltage line.

1)         A high-voltage line is not regarded as deenergized for the

purpose of performing work on it, until it has been determined by a qualified

person under subsection (ff) that such high-voltage line has been deenergized

and grounded.  Such qualified person must by visual observation:

A)        Determine that the disconnecting devices on the high-voltage

circuit are in open position; and

B)        Insure that each ungrounded conductor of the high-voltage

circuit upon which work is to be done is properly connected to the system

grounding medium.  In the case of resistance grounded or solid wye-connected

systems, the neutral wire is the system grounding medium.  In the case of an

ungrounded power system, either the steel armor or conduit enclosing the system

or a surface grounding field is a system grounding medium.

2)         Work must not be performed on any high-voltage line which is

supported by any pole or structure which also supports other high-voltage lines

until:

A)        All lines supported on the pole structure are deenergized and

grounded in accordance with all of the provisions of this Part which apply to

the repair of deenergized surface high-voltage lines; or

B)        The provisions of subsections (v) through (dd) have been

complied with, with respect to the energized lines which are supported on the

pole or structure.

3)         Work must not be performed on energized surface high-voltage

lines except in accordance with the provisions of subsection (u) through (dd)

inclusive.

v)         Repairs to energized high-voltage lines

gh-voltage lines; or

B)        The provisions of subsections (v) through (dd) have been

complied with, with respect to the energized lines which are supported on the

pole or structure.

3)         Work must not be performed on energized surface high-voltage

lines except in accordance with the provisions of subsection (u) through (dd)

inclusive.

v)         Repairs to energized high-voltage lines.

An energized

high-voltage line may be repaired only when:

1)         The operator has determined that:

A)        Such repairs cannot be scheduled during a period when the power

circuit could be properly deenergized and grounded;

B)        Such repairs will be performed on power circuits with a

phase-to-phase nominal voltage no greater than fifteen thousand (15,000) volts;

C)        Such repairs on circuits with a phase-to-phase nominal voltage

of five thousand (5,000) volts or more will be performed only with the use of

live line tools; and

D)        Weather conditions will not interfere with such repairs or

expose those persons assigned to such work to an imminent danger.

2)         The operator has designated a qualified person under

subsection (ff) as the person responsible for carrying out such repairs and

such person, in order to insure protection for himself and other qualified

persons assigned to perform such repairs from the hazards of such repairs, has

prepared and filed with the operator:

A)        A general description of the nature and location of the damage

or defect to be repaired;

B)        The general plan to be followed in making such repairs;

C)        A statement that a briefing of all qualified persons assigned

to make such repairs was conducted informing them of the general plan, their

individual assignments, and the dangers inherent in such assignments;

D)        A list of the proper protective equipment and clothing that

will be provided; and

E)        Such other information as the person designated by the operator

feels necessary to describe properly the means or methods to be emp

ersons assigned

to make such repairs was conducted informing them of the general plan, their

individual assignments, and the dangers inherent in such assignments;

D)        A list of the proper protective equipment and clothing that

will be provided; and

E)        Such other information as the person designated by the operator

feels necessary to describe properly the means or methods to be employed in

such repairs.

3)         Work performed on power lines energized at more than fifteen

thousand (15,000) volts must be done in accordance with a plan submitted to and

approved by the State Mine Inspector.

w)        Work on energized high-voltage surface line; reporting.

Any operator

designating and assigning qualified persons to perform repairs on energized

high-voltage surface lines under the provisions of subsection (v) must maintain

a record of such repairs. Such record must contain a notation of the time,

date, location, and general nature of the repairs made, together with a copy of

the information filed with the operator by the qualified person designated as

responsible for performing such repairs.

x)         Simultaneous repairs.

When two (2)

or more persons are working on an energized high-voltage surface line

simultaneously, and any one of them is within reach of another, such person

must not be allowed to work on different phases or on equipment with different

potentials.

y)         Installation of protective equipment.

1)         Before repair work on energized high-voltage surface lines is

begun, protective equipment must be used to cover all bare conductors, ground

wires, guys, telephone lines, and other attachments in proximity to the area of

planned repairs.  Such protective equipment must be installed from a safe

position below the conductors or other apparatus being covered

ion of protective equipment.

1)         Before repair work on energized high-voltage surface lines is

begun, protective equipment must be used to cover all bare conductors, ground

wires, guys, telephone lines, and other attachments in proximity to the area of

planned repairs.  Such protective equipment must be installed from a safe

position below the conductors or other apparatus being covered.  Each rubber

protective device employed in making repairs must have a dielectric strength of

twenty thousand (20,000) volts or more and must comply with the provisions of

the American Society for Testing and Materials (ASTM) 655 Fifteenth Street

N.W.; Washington, D.C.  20005 as follows:

ITEM

ASTM

STANDARD

DATE

OF ADOPTION

Rubber

Insulating gloves

D120-87

July 31,

1987

Rubber

matting for use around electrical apparatus

D178-88

Nov. 29,

1987

Feb. 26,

1988

Rubber

insulating blankets

D1048-88

Feb. 26,

1988

Rubber

insulating hoods

D1049-83

June 24,

1983

Rubber

insulating line hose

D1050-85

August 30,

1985

Rubber

insulating sleeves

D1051-87

July 31,

1987

AGENCY NOTE:

The standards do not include any later amendments or editions.

2)         Protective equipment of material other than rubber must

provide equal or better electrical and mechanical protection.

3)         Only live line tool poles having a manufacturer's

certification to withstand the following minimum tests shall be used:

A)        One hundred thousand (100,000) volts per foot of length for

five (5) minutes when the tool is made of fiberglass;

B)        Seventy-five thousand (75,000) volts per foot of length for

three (3) minutes when the tool is made of wood; or

4)         Measuring tapes or measuring ropes containing metal must not

be used when working on or near energized parts.

z)         Protective clothing; use and inspection.

1)         All persons performing work on energized high-voltage surface

lines must wear protective rubber linemen's gloves, sleeves, and climber guards

if climbers are worn

hree (3) minutes when the tool is made of wood; or

4)         Measuring tapes or measuring ropes containing metal must not

be used when working on or near energized parts.

z)         Protective clothing; use and inspection.

1)         All persons performing work on energized high-voltage surface

lines must wear protective rubber linemen's gloves, sleeves, and climber guards

if climbers are worn.  Protective rubber gloves must not be worn wrong side out

or without protective leather gloves.  Protective devices worn by a person

assigned to perform repairs on high-voltage surface lines must be worn

continuously from the time he leaves the ground until he returns to the ground

and such person must visually inspect the equipment assigned him for defects

before each use.

2)         All rubber protective equipment used for work on energized

high-voltage surface lines must be electrically tested in accordance with the

American National Standards Institute and the American Society for Testing and

Materials Standards (ASTM), 655 Fifteenth Street N.W.; Washington, D.C.  20005

as follows:

ITEM

ASTM

STANDARD

DATE

OF ADOPTION

Rubber

Insulating gloves

D120-87

July 31,

1987

Rubber

insulating blankets

D1048-88

Feb. 26,

1988

Rubber

insulating hoods

D1049-83

June 24,

1983

Rubber insulating

line hose

D1050-85

August 30,

1985

Rubber

insulating sleeves

D1051-87

July 31,

1987

AGENCY NOTE:

The references do not include any later editions or references.

aa)       Protective equipment; inspection.

Each person

must visually inspect protective equipment and clothing provided him in

connection with work on high-voltage surface lines before using such equipment

and clothing and any equipment or clothing containing any defect or damage must

be discarded and replaced with proper protective equipment or clothing prior to

the performance of any electrical work on such lines.

bb)       Protective equipment; testing and storage

t protective equipment and clothing provided him in

connection with work on high-voltage surface lines before using such equipment

and clothing and any equipment or clothing containing any defect or damage must

be discarded and replaced with proper protective equipment or clothing prior to

the performance of any electrical work on such lines.

bb)       Protective equipment; testing and storage.

1)         All rubber protective equipment used on work on energized

high-voltage surface lines must be electrically tested by the operator in

accordance with subsection (z)(2) and such testing must be conducted in

accordance with the following schedule:

A)        Rubber gloves, once each month(except that gloves previously

tested under Section 220.80(z)(2) that are not in use and have been kept in a

storeroom or warehouse may be treated the same as new gloves);

B)        Rubber sleeves, once every three (3) months;

C)        Rubber blankets, once every six (6) months;

D)        Insulator hoods and line hose, once a year;

E)        Aerial lift arm current test, before each use; and

F)         Other electric protective equipment, once a year.

2)         Rubber gloves must not be stored wrong side out.

3)         Blankets must be rolled when not in use, line hose and

insulator hoods must be stored in their natural position and shape.

cc)       Operating disconnecting or cutout switches.

Disconnecting or cutout switches on energized high-voltage

surface lines must be operated only with insulated sticks, fuse tongs, or

pullers which are adequately insulated and maintained to protect the operator

from the voltage to which he is exposed.  When such switches are operated from

the ground, the person using such devices must wear protective rubber lineman's

gloves except where switches are bonded to a metal mat as provided in

subsection (t).

dd)      Tying into energized high-voltage surface circuits

se tongs, or

pullers which are adequately insulated and maintained to protect the operator

from the voltage to which he is exposed.  When such switches are operated from

the ground, the person using such devices must wear protective rubber lineman's

gloves except where switches are bonded to a metal mat as provided in

subsection (t).

dd)      Tying into energized high-voltage surface circuits.

If the work of forming an additional circuit by tying into an

energized high-voltage surface line is performed from the ground any person

performing such work must wear and employ all the protective equipment and

clothing required and tested under the provisions of subsections (z), (aa),

and(bb).  In addition, the insulated stick used by such person must have been

designed for such purpose and must be adequately insulated and be maintained to

protect such person from the voltage to which he is exposed.

ee)       Use of grounded messenger wires; ungrounded systems.

Solely for purposes of grounding ungrounded high-voltage

power systems, grounded messenger wires used to suspend the cable of such

systems may be used as a grounding medium.

ff)        Repair of energized surface high-voltage line; qualified

person.

An individual is a qualified person for the purpose of

repairing energized surface high-voltage lines, under subsections (t) through

(ee) only if such person:

1)         has had at least two (2) years experience in electrical

maintenance, and

2)         has had at least two (2) years experience in the repair of

energized high-voltage lines located on poles and structures.