Section 220.60 Trailing Cables

Section 220

Section 220.60  Trailing

Cables

a)         Trailing cables; ampacity.

All trailing

cables shall meet the minimum requirements for construction and ampacity

provided in the Standards of the Insulated Power Cable Engineers Association – National

Electric Manufacturers Association in effect when such cables are purchased.

b)         Trailing cables; short-circuit, grounded phase protection, and

disconnecting devices.

Short-circuit

protection for trailing cable shall be provided by a circuit breaker or other

no less effective device of adequate current-interrupting capacity in each

ungrounded conductor.  One (1) breaker may protect multiple cables if the

amperage setting on the breaker is set to the lowest amperage setting of the

smallest circuit.  Disconnecting devices shall be installed in conjunction with

each circuit breaker and within three thousand (3,000) feet of each mobile

machine.  Such disconnecting devices used to connect power from trailing cables

shall be plainly marked and identified and such devices shall be equipped or

designed in such a manner that it can be determined by visual observation that

the power is disconnected.

c)         Short-circuit protection; ratings and settings of circuit

breakers.

Circuit

breakers providing short-circuit protection for trailing cables shall be set at

not more than eighty (80) percent of the short-circuit capability of the

system.  The maximum time for clearing a short circuit shall not exceed that

cable time current rating specified by the Insulated Power Cable Engineers

Association higher settings may be permitted by an authorized representative of

the Department when he has determined that higher settings are justified.

d)         Design of trailing cable for low and medium voltage three (3)

phase equipment

system.  The maximum time for clearing a short circuit shall not exceed that

cable time current rating specified by the Insulated Power Cable Engineers

Association higher settings may be permitted by an authorized representative of

the Department when he has determined that higher settings are justified.

d)         Design of trailing cable for low and medium voltage three (3)

phase equipment.

All trailing

cables supplying power to equipment from low and medium-voltage systems

purchased after effective date shall contain two (2) or more grounding

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

the power conductor and grounded metallic shields around each power conductor.

The metallic shielding shall meet the requirements for shielding provided by

the Standards of the Insulated Power Cable Engineers Association-National

Electrical Manufacturers Association for type SH or SHD portable power cables.

Such trailing cables shall include an insulated conductor for the ground

continuity check circuit except in circuits in which a no less effective device

for ground check monitoring approved by the Department is being utilized.

e)         Splicing of trailing cables.

1)         When splices in trailing cables are made, they shall be:

A)        Mechanically strong with adequate electrical conductivity,

B)        Effectively insulated and sealed so as to exclude moisture, and

C)        Vulcanized or otherwise made with suitable materials to provide

good bonding to the outer jacket.

2)         Splices made in trailing cables shall provide continuity of

all components including the grounded metallic shielding.

3)         Trailing cables or portable cables with exposed wires or

splices that heat or spark under load shall not be used.

f)         Securing of Trailing Cables to equipment.

Trailing cables shall be secured to machines in a manner to

protect the cables from damage and to prevent strain on the electrical

connections.

g)         Protection of trailing cables

g the grounded metallic shielding.

3)         Trailing cables or portable cables with exposed wires or

splices that heat or spark under load shall not be used.

f)         Securing of Trailing Cables to equipment.

Trailing cables shall be secured to machines in a manner to

protect the cables from damage and to prevent strain on the electrical

connections.

g)         Protection of trailing cables.

Trailing cables shall be adequately protected to prevent

damage by mobile equipment and placed to afford protection against rock slides

and other falling objects.  Surplus trailing cable to shovels, draglines,

drills, and similar equipment shall be stored on reels mounted on the equipment

or otherwise protected from mechanical damage.  Damaged outer jackets of

trailing cables shall be repaired to the same degree of protection as the

remainder of the cable.

h)         Breaking trailing cable and power cable connections.

1)         Plugs and connectors in trailing cables and power cables shall

not be connected or disconnected while the circuit is energized.

2)         No power cable or electric circuit supplying power in excess

of two hundred forty (240) volts will be energized or deenergized, hooked up or

unhooked except by a person qualified under Section 220.50(e) of this Part to

perform electrical work, or by a person trained to perform electrical work at

the direction of a qualified person.

3)         This requirement shall not be construed to include the

energizing or deenergizing of a simple "on-off"switch on standard

equipment, when such switch or equipment is located outside of any high-voltage

switch house.

i)          Trailing Cables; Movement.

Trailing cables shall not be moved with mobile equipment

unless cable slings, sleds, or equivalent protection is provided.

j)          Energized trailing cables, handling.

Energized trailing cables, where the phase-to-ground voltage

is one hundred fifty (150) volts or more, shall be handled only by persons

wearing protective gloves

h-voltage

switch house.

i)          Trailing Cables; Movement.

Trailing cables shall not be moved with mobile equipment

unless cable slings, sleds, or equivalent protection is provided.

j)          Energized trailing cables, handling.

Energized trailing cables, where the phase-to-ground voltage

is one hundred fifty (150) volts or more, shall be handled only by persons

wearing protective gloves.  Protective gloves must be worn while using

insulated hooks or tongs.

k)         Protective gloves; minimum requirements.

1)         Protective gloves worn while handling high-voltage trailing cables

shall be rated at least for the phase-to-ground voltage of the system and shall

be used and tested in accordance with the provisions of Section 220.80(aa),

(bb) and (cc).

2)         Protective gloves worn while handling low-voltage and

medium-voltage trailing cables shall be rated for a minimum of the

phase-to-ground voltage of the circuit.

3)         Protective gloves shall be inspected for defects before each

use. Protective gloves which contain defects shall not be used.