apac catalogue 2015 latest · for current information see: lappsea.lappgroup.com 81 Ölflex ®...

81For current information see: lappsea.lappgroup.com

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AppendixSelection Table

T32T32: Current Rating and Voltage Drop

Single-core cables having PVC Insulation, Unarmoured, With or Without Sheath (Copper Conductor) 450/750 V or 600/1000 V

Note: Rating factors for ambient temperature other than 30 degC please refer to Technical Table 32-11

Group Rating Factor please refer to Technical Table 32-12

r = conductor resistance at operating temperature

z = impedance, x = reactance

* With or without protective conductor

Reference Method 1

(clipped direct)

2 cables

1-phase

ac or dc

cables3-phase

ac

3 or 42 cables

1-phase

ac or dc

cables3-phase

ac

3 or 42 cables

1-phase

ac or dc

cables3-phase

ac

3 or 4

ConductorCross-

Areasectional

Reference Method 4(enclosed in conduit in

thermally insulating wall etc)

Reference Method 3(enclosed in conduit on a wall

or in trunking etc)

Reference Method 11

(on a perforated cable

tray, horizontal or vertical)

Reference Method 12 (free air)

2 cables

1-phase

ac or dcflat andtouching

3 cables

3-phase

ac flat andtouching

Horizontalflat spaced

Verticalflat spaced

Trefoil

2 cables

1-phase

ac or dcor 3 cablesor trefoil

2 cables

1-phase

ac or dcor 3 cables3-phase ac

3 cables

3-phase actrefoil

3-phase ac

81 2 3 4 5 6 7 9 10 11 12

2 cables, 1-phase ac 3 or 4 cables, 3-phase ac

Reference Method3 & 4 (enclosed

in or on a wall)

Reference Method1 & 11 (clipped

trays, touching)in conduit etc, direct or on

Reference Method3 & 4 (enclosed

in or on a wall)in conduit etc,

Reference Method12 (space*)

Reference Method12 (flat space*)

Reference Method1, 11 (flat touching)

Reference Method1, 11 & 12

(in trefoil)

2cables

dc

Co

nd

ucto

rC

ross

-secti

on

al

Are

a

81 2 3 4 5 6 7 9

Cable Categories: OLFLEX POWER LV (N)YY (Single-core)®..

Disclaimer: Reference to BS 7671 Standard. Material provided is for reference only, please refer to the latest version of the BS 7671 Standard.

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For current information see: lappsea.lappgroup.com



ConductorCross-

Areasectional

81 2 3 4 5 6 7 9

1 2 3 4

Reference Method 4(enclosed in an

insulated wall etc)


or celling, or in trunking)

Reference Method 1

(clipped direct)

Reference Method 11(on a perforated cable tray) or

Reference Method 13 (free air)

2-core cables*1-phaseac or dc

3 or 4-core*cables 3-phase

ac



ac



ac



ac

ConductorCross-sectional Area

2-core cables, ac1-phase, ac

2-core cables3-phase, ac

3 or 4-core cables

Multicore cables having PVC Insulation, Unarmoured (Coppper Conductor) 600/1000 V

Cable Categories: OLFLEX POWER LV (N)YY (Multicore)®..



r = conductor resistance at operating temperature

z = impedance, x = reactance

* With or without protective conductor

APPENDIX



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81 2 3 4 5 6 7 9

ConductorCross-sectional Area 2-core cables, ac

1-phase, ac2-core cables

3-phase, ac3 or 4-core cables

ConductorCross-sectional

Area

Reference Method 1

(clipped direct)

Reference Method 11(on a perforated horizontal

Method 13 (free air)

In single way ductscable tray) or Reference Laid direct in ground

2-core cables1-phaseac or dc

3 or 4-corecables 3-phase

ac



ac 2-core 3 or 4-core 2-core 3 or 4-core

2-core 3 or 4core

In singleLaid direct

way ductsin ground

2-core 3 or 4core

81 2 3 4 5 6 7

Multicore cables having PVC Insulation, Armoured (Coppper Conductor) 600/1000 V

Cable Categories: OLFLEX POWER LV (N)YYRY®..


Group Rating Factor please refer to Technical Table 32-12 and 32-13r = conductor resistance at operating temperaturez = impedance, x = reactance

Rating factors for ground temperature other than 15 degC please refer to Technical Table 32-11


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8


T32

Reference Method 4(enclosed in conduit in

thermally insulating wall etc)


or in trunking etc)

Reference Method 1

(clipped direct)

ReferenceMethod 11

(on a perforatedcable tray,

horizontal orvertical)

ReferenceMethod 12(free air)

2 cables1-phaseac or dc

3 or 4 cables3-phase

ac


3 or 4 cables3-phase

ac


3 or 4 cables3-phase ac

flat & touchingflat & touching

or trefoil

2 cables1-phaseac or dcflat &

touching

cables3-phaseac flat &touchingtrefoil

3 or 4

3 cables trefoil3-phase ac

1 2 3 4 5 6 7 9 10

2 cablesdc

2 cables, 1-phase ac

Reference Method 3 &4 (enclosed in conduit

etc, in or on a wall)

Reference Method 1 &11 (clipped direct or on

trays touching)

3 or 4 cables, 3-phase ac

Reference Method 3 &4 (enclosed in conduit

etc, in or on a wall)

Reference Method 111 & 12 (in trefoil)

Reference Method 1 &11 (flat and touching)

1 2 3 4 5 6 7

T32: Current Rating and Voltage Drop

ConductorCross-

Areasectional

ConductorCross-

Areasectional

Single-core cables having XLPE or LSHF Insulation, Unarmoured, With or Without Sheath (Copper Conductor) 450/750 V or 600/1000 V

Cable Categories: OLFLEX POWER LV (N)2XY (Single-core), FR-6387 SC, FLEXI H SC®..


Group Rating Factor please refer to Technical Table 32-12 r = conductor resistance at operating temperaturez = impedance, x = reactance

APPENDIX



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Reference Method 4(enclosed in conduit and

in insulating wall etc)


or celling, or in trunking etc)

Reference Method 1

(clipped direct)

Reference Method 11(on a perforated cable tray)

(free air)or Reference Method 13



ac



ac



ac



ac

81 2 3 4 5 6 7 9

2-core cables, dc1-phase, ac

2-core cables3-phase, ac

3 or 4-core cables

1 2 3 4


Area

ConductorCross-sectional Area

Multicore cables having XLPE or LSHF Insulation, Unarmoured (Copper Conductor) 300/500 V or 600/1000 V

Cable Categories: OLFLEX POWER LV (N)2XY (Multicore), FR-6387 MC, FR-6387 OS, FR-6387 MC CONTROL®..



r = conductor resistance at operating temperaturez = impedance, x = reactance


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Area

Reference Method 1(clipped direct)


(free air)

Method 12

Reference In single way ducts Laid direct in ground


flat & touching


flat & touching


flat & touching


flat & touching

3 or 4 cables3-phase, ac

trefoil touching

2 cables1-phaseac or dcducts

touching

3 or 4

3-phaseac, trefoil

ductstouching

2 cables1-phaseac or dctouching

81 2 3 4 5 6 7 9 10


Area

2 cables, dc

2 cables, 1-phase ac 3 or 4 cables, 3-phase ac2 cables, 1-phase ac

3 or 4 cables,3-phase ac, touching

Reference Methods

1 & 11 (touching)

Reference Methods1, 11 or 12

(in trefoil touching)

Reference Methods1 & 11

(flat & touching) In ducts In ground In ducts In ground

81 2 3 4 5 6 7 9

cables 3 or 4

3-phaseac, trefoiltouching

cables

APPENDIX

Single-core cables having XLPE or LSHF Insulation, Armoured (Copper Conductor) 600/1000 V

Cable Categories: OLFLEX POWER LV (N)2XYRY (Single-core)®..


Group Rating Factor please refer to Technical Table 32-12 and 32-13





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Reference Method 1

(clipped direct)


Area


(free air)or Reference Method 13

In single way ducts Laid direct in ground



ac



ac



ac



ac

81 2 3 4 5 6 7 9


Area

2-core cablesdc

2-core cables1-phase ac

3 or 4-core cables3-phase ac

2-core cables, 1-phase ac3 or 4-core cables

3-phase ac

In ducts In ground In ducts In ground

81 2 3 4 5 6 7

Multicore cables having XLPE or LSHF Insulation, Armoured (Copper Conductor) 600/1000 V

Cable Categories: OLFLEX POWER LV (N)2XYRY (Multicore)®..


Group Rating Factor please refer to Technical Table 32-12 and 32-13




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T32T32: Correction Factors

Ambient Temperature ( C )

Rating Factors in Air

Rating Factors in Ground

o 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85

1.02 1.00 0.96 0.91 0.87 0.82 0.76 0.71 0.65 0.58 0.50 0.41 0.29

1.00 0.97 0.93 0.89 0.86 0.82 0.77 0.73

Ambient Temperature ( C )

Rating Factors in Air

Rating Factors in Ground

o 15 20 25 30 35 40 45 50 55 60 65 70 -

1.00 0.94 0.87 0.79 0.71 0.61 0.50 0.35

1.00 0.95 0.90 0.85 0.80 0.73 0.67 0.60

10 -

-1.03

1.04

Correction Factor (Cg)

Reference Methods

of Installation Number of Circuits or Multicore Cables

Enclosed (Method 3 or 4) or bunched and clipped

direct to a non-metallic surface (Method 1)

Single layer clipped to anon-metallic surface (Method 1)

Single layer multicore on aperforated metal cable tray,vertical or horizontal (Method 11)

Single layer single core on aperforated metal cable tray,touching (Method 11)

Single layer multicore touching

on ladder supports (Method 13)

Touching

Spaced*

Touching

Spaced*

Horizontal

Vertical

4. * 'Spaced' means a clearance between adjacent surfaces of at least one cable diameter (De). Where the horizontal clearance between adjacent cables

Notes: 1. The factors in the table are applicable to groups of cables all of one size. The value of current derived from application of the appropriate factors is the

maximum current to be carried by any of the cables in the group

2. If, due to known operating conditions, a cable is expected to carry not more than 30% of its grouped rating, it may be ignored for the purpose of obtaining

the rating factor for the rest of the group

For example, a group of N loaded cables would normally require a group reduction factor of Cg applied to the tabulated It. However, if M cables in the

group carry loads which are not greater than 0.3 Cg x It amperes, the other cables can be sized by using the group rating factor corresponding to (N-M)

cables

3. When cables having differing conductor operating temperatures are grouped together, the current rating shall be based on the lowest operating

temperature of any cable in the group

exceeds 2 x De, no correction factor need be applied

2 3 4 5 6 7 8 9 10 12 14 16 18 20

0.80 0.70 0.65 0.60 0.57 0.54 0.52 0.50 0.48 0.45 0.43 0.41 0.39 0.38

0.85 0.79 0.75 0.73 0.72 0.72 0.71 0.70

0.94 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90

0.86 0.81 0.77 0.75 0.74 0.73 0.73 0.72 0.71 0.70

0.91 0.89 0.88 0.87 0.87

0.90 0.85

0.85

0.86 0.82 0.80 0.79 0.78 0.78 0.78 0.77



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T32T32: Correction Factors

Group Rating Factors

For twin or multicore

Number of Circuits

Number of Cables in a Group

Number of Ducts in a Group

cables in horizontal

ground

For circuits of 2 single-core cables laid flattouching horizontal formation, laid direct in

For circuits of 3 single-core cables in trefoil touching, laid direct in ground

formation, laid direct in ground

Spaced 0.15 m

Spaced 0.30 m

For twin or multicore cables in single-wayducts horizontal formation spaced 0.30 mapart

ConductorCross-

Areasectional

Installation Method 18 Installation Method 19 Installation Method 20

1-corecables,

2

3- or 4-core

cables

1-corecables,

3

2-corecables

1-corecables,

4

3- or 4-core

cables

or 1 or 2 or 2

1-corecables,

6

3- or4-corecables

cables, or 3

42-core

1-corecables,

6

3- or4-corecables

cables, or 3

42-core

1-corecables,

8

3- or 4-core

cables

or 4

1-corecables,

12

3- or4-corecables

cables, or 6

82-core

1-corecables,

12

3- or4-corecables

cables, or 6

82-core

1-corecables,

18

3- or4-corecables

cables, or 9

122-core

1-corecables,

24

3- or4-corecables

cables, or 12

162-core

When cables having different conductor operating temperatures are grouped together the current rating shall be based on the lowest operating temperatureof any cable in the group

The correction factors tabulated above relate to the disposition of cables illustrated in items 18 to 20 of Technical Table T32-3 and are applicable to thecurrent carrying capacities for Reference Methods 12 or 13 of Technical Table T32-2


T32

apac catalogue 2015 latest · for current information see: lappsea.lappgroup.com 81 Ölflex ®...

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