1 Scope

1.1 These requirements cover the shielded and nonshielded medium-voltage power cables that are described in (single-conductor) and (multiple-conductor). Multiple-conductor cables may include one or more individually jacketed non-conductive optical-fiber members. These electrical and hybrid electrical and optical-fiber cables are for use (optical and electrical functions associated in the case of a hybrid cable) in accordance with Article 328 and other applicable parts of the National Electrical Code (NEC), NFPA 70.

1.2 These cables have one or more stranded copper or aluminum conductors that are insulated with a solid, extruded dielectric. Cables that have a metal sheath or interlocked armor incorporate an effective grounding path. A grounding conductor is optional in other cables. Cables for direct burial are so marked and have an overall covering (see 4 for direct-burial cables that are not covered). Cables that are for use in cable trays generally are so marked (see 1 and 2). Cables that are sunlight-resistant generally are so marked (see 1 – 3). Cables that are marked “MV-90” or “MV-90 dry” have a maximum operating temperature of 90°C (194°F). Cables that are marked “MV-105” have a maximum operating temperature of 105°C (221°F) for use where design conditions require a maximum conductor temperature above 90°C (194°F). Cables that are marked “dry” have insulation for use only in dry locations. All other cables have insulation that is for use in both wet and dry locations. Multiple-conductor cables that include one or more optical-fiber members are surface marked to so indicate. Cables that are marked “oil resistant II” are for exposure to mineral oil at temperatures not in excess of 75°C (167°F). Cables that are marked “oil resistant I” are for exposure to mineral oil at temperatures not in excess of 60°C (140°F).

1.3 A multiple-conductor Type MV cable that has a smooth (other than lead) or corrugated metal sheath or that has interlocked metal armor may be marked for use also as Type MC cable.

1.4 This standard does not include requirements for cables with concentric neutral conductors. However, it is possible to have a single-conductor cable with a concentric neutral conductor manufactured in accordance with the requirements of other standards, that meets the requirements for jacketed single-conductor shielded cable in this standard.

Voltage rating

Size

Use

Insulation material

Percent insulation level

Insulation thicknesses

Shield

Overall covering

8 AWG – 1000 kcmil

90°C (194°F) dry

XLPE or EPCV

–

Column A

nonshielded

None

2400

90°C (194°F) dry

XLPE, EPCV, DREP, or EP

–

Column B

nonshielded

Nonconductive jacket Column B

90°C (194°F) wet or dry

XLPE, DREP, or EP

–

Column C

nonshielded

Nonconductive jacket Column C

5000

8 AWG – 2000 kcmil

90°C (194°F)

or

105°C (221°F)

wet or dry

XLPE, DREP, or EP

100 or 133

or

Shielded

a

8000

6 AWG – 2000 kcmil

90°C (194°F)

or

105°C (221°F)

wet or dry

XLPE, DREP, or EP

100, 133, or 173

or

Shielded

a

15000

2 AWG – 2000 kcmil

90°C (194°F)

or

105°C (221°F)

wet or dry

XLPE, DREP, or EP

100, 133, or 173

or

Shielded

a

25000

1 AWG – 2000 kcmil

90°C (194°F)

or

105°C (221°F)

wet or dry

XLPE, DREP, or EP

100, 133, or 173

or

Shielded

a

28000

1 AWG – 2000 kcmil

90°C (194°F)

or

105°C (221°F)

wet or dry

XLPE, DREP, or EP

100, 133, or 173

or

Shielded

a

35000

1/0 AWG – 2000 kcmil

90°C (194°F)

or

105°C (221°F)

wet or dry

XLPE, DREP, or EP

100, 133, or 173

or

Shielded

a

^a The overall covering consists of one of the following (see for complete descriptions):

1) Conductive nonmetallic insulation covering () as part of shielding, with or without nonmagnetic metal sheath or armor over conductive nonmetallic insulation covering as part of shielding, with or without supplementary non-conductive jacket () over metal sheath or armor.

2) Non-conductive jacket () over shielding, with or without nonmagnetic metal sheath or armor over non-conductive jacket, with or without supplementary non-conductive jacket () over metal sheath or armor.

3) Nonmagnetic metal sheath or armor as part of shielding, with or without supplementary non-conductive jacket () over metal sheath or armor.

Voltage rating

Circuit conductors

Grounding conductor

Overall covering

Size

Use

Insulation material

Percent insulation level

Insulation thicknesses

Shield

Individual covering

2400

8 AWG – 1000 kcmil

90°C

(194°F) dry

XLPE or EPCV

–

Column A

nonshielded

None

Optional Covered 1

None – assembly of single-conductor cables

90°C

(194°F) dry

XLPE, EPCV, DREP, or EP

–

Column B

nonshielded

Non-conductive jacket Column B

Optional Covered 1

None – assembly of single-conductor cables

90°C

(194°F) wet or dry

XLPE, DREP, or EP

–

Column C

nonshielded

Non-conductive jacket Column C

Optional Covered

None – assembly of single-conductor cables

90°C

(194°F) or 105°C

(221°F) wet or dry

XLPE, DREP, or EP

Column C

nonshielded

None or Non-conductive jacket ()

Optional Bare 5

Non-conductive jacket ()

–

Required Bare 1

Interlocked armor with or without Supplementary jacket

May be required Bare 3 and 4

Metal sheath with or without Supplementary jacket

5000

8 AWG – 2000 kcmil

90°C

(194°F) or 105°C

(221°F)

XLPE, DREP, or EP

100

,

Shielded

Non-conductive jacket () over shield

Optional Covered 1

None

Conductive nonmetallic insulation covering () as part of shield

Optional Covered

None

Metal sheath as part of shield with or without Supplementary jacket

Optional Covered 1

None

8000

6 AWG – 2000 kcmil

90°C

(194°F) or 105°C

(221°F) wet or dry

XLPE, DREP, or EP

100, 133, or 173

,

Shielded

None or Non-conductive jacket ()

Optional Bare 5

Non-conductive jacket ()

Required Bare 1

Interlocked armor with or without Supplementary jacket

15000

2 AWG – 2000 kcmil

90°C

(194°F) or 105°C

(221°F) wet or dry

XLPE, DREP, or EP

100, 133, or 173

May be required to Bare 3 and 4

Metal sheath with or without Supplementary jacket

Non-conductive jacket () over shield

Optional Covered 1

None

25000

1 AWG – 2000 kcmil

90°C

(194°F) or 105°C

(221°F) wet or dry

XLPE, DREP, or EP

100, 133, or 173

Conductive nonmetallic insulation covering () as part of shield

Optional Covered 1

None

Metal sheath as part of shield with or without supplementary jacket

Optional Covered 1

None

28000

1 AWG – 2000 kcmil

90°C

(194°F) or 105°C

(221°F) wet or dry

XLPE, DREP, or EP

100, 133, or 173

,

None or Non-conductive jacket ()

Optional Bare 5

Non-conductive jacket ()

Required Bare 2

Interlocked armor with or without Supplementary jacket

May be required Bare 3 and 4

Metal sheath with or without Supplementary jacket

35000

1/0 AWG – 2000 kcmil

90°C

(194°F) or 105°C

(221°F) wet or dry

XLPE, DREP, or EP

100, 133, or 173

,

Shielded

Non-conductive jacket () over shield

Optional Covered

None

Conductive nonmetallic insulation covering () as part of shield

Optional Covered 1

None

Metal sheath as part of shield with or without Supplementary jacket

Optional Covered 1

None