ACADEMIA DO CONHECIMENTO

Current Ratings & Volt Drop – IEE

TABLE 4A2 Schedule of appropriate current ratings tables - IEE

Specification number Specification TitleApplicable Current Rating TablesConductor Operating Temperature
BS5467:1997Specification for 600/1000V & 1900/3300V armoured electric cables having thermosetting insulation4E3, 4E4, 4L3, 4L490ºC
BS6004:2000Electric cables. PVC insulated, non-armoured cables for voltages up to and including 450/750V, for electric power, lighting & internal wiring4D1, 4D2, 4E170ºC, 90ºC
PVC insulated & sheathed flat cable with protective conductor to Table 84D570ºC
BS6207-1:1995Mineral insulated cables with a rated voltage not exceeding 750V4J1, 4J270ºC*, 105ºC*
BS6346:1997Specification for 600/1000V & 1900/3300V armoured electric cables having PVC insulation4D3, 4D4, 4K3, 4K470ºC
BS6500:2000Electric cbales. Flexible cords rated up to 300/500V, for use with appliances and equipment intended for domestic, office and similar environments4H360ºC, 90ºC
BS6724:1997Specification for 600/1000V & 1900/3300Varmoured electric cables having thermosetting insulation and low emission of smoke and corrosive gases when affected by fire4E3, 4E4, 4L3, 4L490ºC
BS6883:1999Elastomer insulated cables for fixed wiring in ships and on mobile & fixed offshore units. Requirements & test methods4F1, 4F285ºC
BS7211:1998Specification for thermosetting insulated cables (non-armoured) for electric power & lighting with low emission of smoke & corrosive gases when affected by fire4E1, 4E290ºC
BS7629-1:1997Specification for 300/500V fire resistant electric cables having low emission of smoke & corrosive gases when affected by fire. Multicore cables4D270ºC
BS7846:2000Electric cables. 600/1000V armoured fire-resistant electric cables having thermosetting insulation & low emission of smoke and corrosive gases when affected by fire4E490ºC
BS7889:1997Specification for 600/1000V single-core unarmoured electric cables having thermosetting insulation4E1, 4L190ºC
BS7919:2001Electric cables. Flexible cables rated up to 450/750V, for use with appliances & equipment intended for industrial & similar environments4H1, 4H2, 4H360ºC,  110ºC
BS8436:2004300/500V screened electric cables having low emission of smoke & corrosive gases when affected by fire, for use in thin partitions and building voids4D270ºC
BSEN60702-1:2001Mineral insulated cables and their terminations with a rated voltage not exceeding 750V. Cables4J1, 4J270ºC*, 105ºC*
 * sheath operating temperature

TABLE 4A3 Schedule of appropriate current ratings tables - IEE

Specification NumberSpecification TitleApplicable Current Rating Tables (16th edition tables)Conductor Operating Temperature
BS5467:1997Electric cables – thermosetting insulated armoured cables for voltages of 600/1000V & 1900/3300V4E3, 4E4, 4J3, 4J4 (4L3, 4L4)90ºC
BS6004:2000Electric cables – PVC insulated, non-armoured cables for voltages up to and including 450/750V, for electric power, lighting & internal wiring4D1, 4D270ºC
Thermoplastic insulated & sheathed flat cable with protective conductor to Table 84D570ºC
BS6231Electic cables – single-core PVC insulated flexible cables of rated voltage 600/1000Vfor switchgear & controlgear wiring4D170ºC*
BS6346:1997Electric cables – PVC insulated, armoured cables for voltages of 600/1000V & 1900/3300V4D3, 4D4, 4H3, 4H4 (4K3, 4K4), 4J3, 4J470ºC
BS6500:2000Electric cbales – Flexible cords rated up to 300/500V, for use with appliances and equipment intended for domestic, office and similar environments4F3 (4H3)60ºC, 90ºC
BS6724:1997Electric cables – thermosetting insulated, armoured cables for voltages of 600/1000V & 1900/3300V having low emission of smoke and corrosive gases when affected by fire4E3, 4E4, 4J3, 4J4 (4L3, 4L4)90ºC
BS7211:1998Electric cables – thermosetting insulated non-armoured cables for voltages up to and including 450-750V for electric power, lighting & internal wiring and having low emission of smoke & corrosive gases when affected by fire4E290ºC
BS7629-1:1997Specification for 300/500V fire resistant electric cables having low emission of smoke & corrosive gases when affected by fire. Multicore cables4D270ºC
BS7846:2000Electric cables – 600/1000V armoured fire-resistant electric cables having thermosetting insulation & low emission of smoke and corrosive gases when affected by fire4E3, 4E4, 4J3, 4J490ºC
BS7889:1997Electric cables – thermosetting insulated, armoured cables for a voltatge of 600/1000V4E190ºC
BS7919:2001Electric cables – Flexible cables rated up to 450/750V, for use with appliances & equipment intended for industrial & similar environments4F1, 4F2, 4F3, (4H1, 4H2, 4H3)60ºC,  90ºC
BS8436:2004Electric cables – 300/500V screened electric cables having low emission ofsmoke & corrosive gases when affected by fire, for use in walls, partitions and building voids – multicore cables4D270ºC
BSEN60702-1:2001Mineral insulated cables and their terminations with a rated voltage not exceeding 750V. Cables4G1, 4G2 (4J1, 4J2)70ºC**, 105ºC**
*  cables to BS6231 when installed in conduit or trunking are rated to 70ºC
** sheath operating temperature

Table 4D1A PVC Insulation / Copper / Single-core / Non-armoured - IEE

  • Standard: BS 7671
  • Table 4D1A
  • Single-core 70 °C thermoplastic insulated cables, non armoured, with or without sheath
  • Copper conductors
  • Conductor temperature: 70 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
TouchingSpaced
by one diameter
2 cables,
single-
phase
AC or DC
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
flat
3 cables,
three-
phase AC
flat
3 cables,
three-
phase AC
trefoil
2 cables single-phase
AC or DC or 3 cables
three-phase AC flat
HorizontalVertical
123456789101112
11110.513.51215.514
1.514.513.517.515.52018
2.5201824212725
4262432283733
6343141364743
10464257506559
16615676688779
25807310189114104131114110146130
359989125110141129162143137181162
50119108151134182167196174167219197
70151136192171234214251225216281254
95182164232207284261304275264341311
120210188269239330303352321308396362
150240216300262381349406372356456419
185273245341296436400463427409521480
240321286400346515472546507485615569
300367328458394594545629587561709659
400546467694634754689656852795
500626533792723868789749982920
630720611904826100590585511381070
80010309431086102097112651188
10001154105812161149107914201337

Table 4D2A PVC Insulation / Copper / Multi-core / Non-armoured - IEE

  • Standard : BS 7671
  • Table 4D2A
  • Multi-core 70 °C thermoplastic insulated and thermoplastic sheathed cables, non armoured
  • Copper conductors
  • Conductor temperature: 70 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
123456789
111101311.51513.51714.5
1.5141316.51519.517.52218.5
2.518.517.5232027243025
42523302736324034
63229383446415143
104339524663577060
165752696285769480
257568908011296119101
35928311199138119148126
5011099133118168144180153
701391251681492134184232196
95167150201179258223282238
120192172232206299259328276
150219196258225344299379319
185248223294255392341434364
240291261344297461403514430
300334298394339530464593497
400470402634557715597

Table 4D3A PVC Insulation / Copper / Single-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4D3A
  • Single-core armoured 70 °C thermoplastic insulated cables
  • Copper conductors
  • Conductor temperature: 70 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
TouchingTouchingSpaced by one cable diameter
2 cables,
single-
phase
AC or DC flat
3 or 4
cables,
three-
phase AC flat
2 cables,
single-
phase
AC or DC flat
3 cables,
three-
phase AC flat
3 cables,
three-
phase AC trefoil
2 cables DC2 cables AC
single-phase AC
3 or 4 cables
three-phase AC
HorizontalVerticalHorizontalVerticalHorizontalVertical
123456789101112
50193179205189181229216229217230212
70245225259238231294279287272286263
95296269313285280357340349332338313
120342309360327324415396401383385357
150393352413373373479458449429436405
185447399469422425548525511489490456
240525465550492501648622593568566528
300594515624547567748719668640616578
400687575723618657885851737707674632
5007636228056737311035997810777721676
63084366989172880912181174893856771723
80091971097677788614411390943905824772
10009757371041808945168516271008967872816

Table 4D4A PVC Insulation / Copper / Multi-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4D4A
  • Multi-core armoured 70 °C thermoplastic insulated cables
  • Copper conductors
  • Conductor temperature: 70 °C
  • Air Ambient temperature: 30 °C
  • Ground Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
Reference Method F
(direct in ground or in ducting
in ground, in or around buildings)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1234567
1.5211822192218
2.5282531262924
4383341353730
6494253454638
106758726260507
16897797837864
251181021281109982
3514512515713511998
50175151190163140116
70222192241207173143
95269231291251204169
120310267336290231192
150356306386332261217
185405348439378292243
240476409516445336280
300547469592510379316
400621540683590

Table 4E1A XLPE Insulation / Copper / Single-core / Non-armoured - IEE

  • Standard: BS 7671
  • Table 4E1A
  • Single-core 90 °C thermosetting insulated cables, non armoured, with or without sheath
  • Copper conductors
  • Conductor temperature: 90 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
TouchingSpaced
by one diameter
2 cables,
single-
phase
AC or DC
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
flat
3 cables,
three-
phase AC
flat
3 cables,
three-
phase AC
trefoil
2 cables single-phase
AC or DC or 3 cables
three-phase AC flat
HorizontalVertical
123456789101112
1141317151917.5
1.5191723202523
2.5262331283431
4353142374641
6454054485954
10615475668174
1681731008810999
2510695133117143130161141135182161
35131117164144176161200176169226201
50158141198175228209242216207275246
70200179253222293268310279268353318
95241216306269355326377342328430389
120278249354312413379437400383500454
150318285393342476436504464444577527
185362324449384545500575533510661605
240424380528450644590679634607781719
300486435603514743681783736703902833
40068358486879394086882310851008
500783666990904108399894612531169
6309007641130103312541151108814541362
8001288117913581275121415811485
10001443132315201436134917751671

Table 4E2A XLPE Insulation / Copper / Multi-core / Non-armoured - IEE

  • Standard: BS 7671
  • Table 4E2A
  • Multi-core 90 °C thermosetting insulated and thermoplastic sheathed cables, non armoured
  • Copper conductors
  • Conductor temperature: 90 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
123456789
114.513171519172118
1.518.516.52219.524222623
2.52522302633303632
43330403545404942
64238514458526354
105751696080718675
167668918010796115100
259989119105138119149127
35121109146128171147185158
50145130175154209179225192
70183164221194269229289246
95220197265233328278352298
120253227305268382322410346
150290259334300441371473399
185329295384340506424542456
240386346459398599500641538
300442396532455693576741621
400625536803667865741

Table 4E3A XLPE Insulation / Copper / Single-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4E3A
  • Single-core armoured 90 °C thermosetting insulated cables
  • Copper conductors
  • Conductor temperature: 90 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
TouchingTouchingSpaced by one cable diameter
2 cables,
single-
phase
AC or DC flat
3 or 4
cables,
three-
phase AC flat
2 cables,
single-
phase
AC or DC flat
3 cables,
three-
phase AC flat
3 cables,
three-
phase AC trefoil
2 cables DC2 cables AC
single-phase AC
3 or 4 cables
three-phase AC
HorizontalVerticalHorizontalVerticalHorizontalVertical
123456789101112
50237220253232222284270282266288266
70303277322293285356349357337358331
95367333389352246446426436412425393
120425383449405402519497504477485449
150488437516462463600575566539549510
185557496587524529688660643614618574
240656579689612625815782749714715666
300755662792700720943906842805810755
40085371789976781511371094929889848797
5009627911016851918131412661032989923871
6301082861114693510271528147411391092992940
80011709041246987111918091744120411551042978
10001261961134510551214210020261289123811101041

Table 4E4A XLPE Insulation / Copper / Multi-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4E4A
  • Multi-core armoured 90 °C thermosetting insulated cables
  • Copper conductors
  • Conductor temperature: 90 °C
  • Air Ambient temperature: 30 °C
  • Ground Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
Reference Method F
(direct in ground or in ducting
in ground, in or around buildings)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1234567
1.5272329252521
2.5363139333328
4494252444336
6625366565344
10857390787158
1611094115999175
2514612415213111696
35180154188162139115
50219187228197164135
70279238291251203167
95338289354304239197
120392335410353271223
150451386472406306251
185515441539463343281
300698599732628446365
400787673847728

Table 4H1A PVC Insulation / Aluminium / Single-core / Non-armoured - IEE

  • Standard: BS 7671
  • Table 4H1A
  • Single-core 70 °C thermoplastic insulated cables, non armoured, with or without sheath
  • Aluminium conductors
  • Conductor temperature: 70 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
TouchingSpaced
by one diameter
2 cables,
single-
phase
AC or DC
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
flat
3 cables,
three-
phase AC
flat
3 cables,
three-
phase AC
trefoil
2 cables single-phase
AC or DC or 3 cables
three-phase AC flat
HorizontalVertical
123456789101112
509384118104125110149133128169152
70118107150133160140192173166217196
95142129181161195170235212203265241
120164149210186226197273247237308282
150189170234204261227316287274356327
185215194266230298259363330316407376
240252227312269352305430392375482447
300289261358306406351497455434557519
380413352511472543502507625584
480477405591546629582590726680
600545462679626722669680837787
740771709820761776956902
96090082395388690711251066
120010229261073999102612931229

Table 4H2A PVC Insulation / Aluminium / Multi-core / Non-armoured - IEE

  • Standard: BS 7671
  • Table 4H2A
  • Multi-core 70 °C thermoplastic insulated and thermoplastic sheathed cables, non armoured
  • Aluminium conductors
  • Conductor temperature: 70 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
123456789
164441544866597361
255853716283738978
35716586771039011196
50867810492125110135117
7010898131116160140173150
95130118157139195170210183
120135160197212
150155176227245
185176199259280
240207232305330
300237265351381

Table 4H3A PVC Insulation / Aluminium / Single-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4H3A
  • Single-core armoured 70 °C thermoplastic insulated cables
  • Aluminium conductors
  • Conductor temperature: 70 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
TouchingTouchingSpaced by one cable diameter
2 cables,
single-
phase
AC or DC flat
3 or 4
cables,
three-
phase AC flat
2 cables,
single-
phase
AC or DC flat
3 cables,
three-
phase AC flat
3 cables,
three-
phase AC trefoil
2 cables DC2 cables AC
single-phase AC
3 or 4 cables
three-phase AC
HorizontalVerticalHorizontalVerticalHorizontalVertical
123456789101112
50143133152141131167157168159169155
70183168194178168214202212200213196
95221202234214205261247259245255236
120255233270246238303288299285293272
150294267310282275349333340323335312
185334303352319315400382389371379354
240393354413374372472452457437443415
300452405474427430545523520498505475
380518452543479497638613583559551518
480586501616534568742715655629604568
600658550692589642859828724696656618
740728596769642715986952802770707666
96081965186870680811711133866832770726
120089369295275688013601317938902822774

Table 4H4A PVC Insulation / Aluminium / Multi-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4H4A
  • Multi-core armoured 70 °C thermoplastic insulated cables
  • Aluminium conductors
  • Conductor temperature: 70 °C
  • Air Ambient temperature: 30 °C
  • Ground Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
Reference Method F
(direct in ground or in ducting
in ground, in or around buildings)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
 
1234567
1668587161
25897694807764
3510994115999377
5013111313911910991
70165143175151135112
95199174211186159132
1202022161502
150232250169
185265287190
240312342218
300360399247

Table 4J1A XLPE Insulation / Aluminium / Single-core / Non-armoured - IEE

  • Standard:BS 7671
  • Table 4J1A
  • Single-core 90 °C thermosetting insulated cables, non armoured, with or without sheath
  • Aluminium conductors
  • Conductor temperature: 90 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
TouchingSpaced
by one diameter
2 cables,
single-
phase
AC or DC
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
3 or 4
cables,
three-
phase AC
2 cables,
single-
phase
AC or DC
flat
3 cables,
three-
phase AC
flat
3 cables,
three-
phase AC
trefoil
2 cables single-phase
AC or DC or 3 cables
three-phase AC flat
HorizontalVertical
123456789101112
50125113157140154136184165159210188
70158142200179198174237215206271244
95191171242217242211289264253332300
120220197281251280245337308296387351
150253226307267324283389358343448408
185288256351300371323447413395515470
240338300412351439382530492471611561
300387344471402508440613571544708652
380658594679628638798742
480765692786728743927865
6008717919038368491058990
7401001911102595197912181143
9601176107211911108115114401355
12001333121713411249130716431550

Table 4J2A XLPE Insulation / Aluminium / Multi-core / Non-armoured - IEE

  • Standard: BS 7671
  • Table 4J2A
  • Multi-core 90 °C thermosetting insulated and thermoplastic sheathed cables, non armoured
  • Aluminium conductors
  • Conductor temperature: 90 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method A
(enclosed in conduit
in thermally insulated
wall etc.)
Reference Method B
(enclosed in conduit
on a wall or in
trunking etc.)
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
123456789
166055726484769177
25787194841019010897
359687115103126112135120
50115104138124154136164146
70145131175156198174211187
95175157210188241211257227
120180216245263
150206240283304
185233272323347
240273318382409
300313364440471

Table 4J3A XLPE Insulation / Aluminium / Single-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4J3A
  • Single-core armoured 90 °C thermosetting insulated cables
  • Aluminium conductors
  • Conductor temperature: 90 °C
  • Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(clipped direct)
Reference Method F
(in free air or in perforated cable tray horizontal or vertical)
TouchingTouchingSpaced by one cable diameter
2 cables,
single-
phase
AC or DC flat
3 or 4
cables,
three-
phase AC flat
2 cables,
single-
phase
AC or DC flat
3 cables,
three-
phase AC flat
3 cables,
three-
phase AC trefoil
2 cables DC2 cables AC
single-phase AC
3 or 4 cables
three-phase AC
HorizontalVerticalHorizontalVerticalHorizontalVertical
123456789101112
50179165192176162216197212199215192
70228209244222207275253269254270244
95276252294267252332307328310324296
120320291340308292384357378358372343
150368333390352337441411429409424394
185419378444400391511480490467477447
240494443521468465605572576549554523
300568508597536540701666654624626595
380655573688608625812780735704693649
480747642786685714942906825790765717
60083670688075780110761036909872832780
740934764988824897125012051204989890835
9601056838112191110141488143510941052970911
120011639031236990111817151658118711411043980

Table 4J4A XLPE Insulation / Aluminium / Multi-core / Armoured - IEE

  • Standard: BS 7671
  • Table 4J4A
  • Multi-core armoured 90 °C thermosetting insulated cables
  • Aluminium conductors
  • Conductor temperature: 90 °C
  • Air Ambient temperature: 30 °C
  • Ground Ambient temperature: 30 °C
Conductor
nominal
cross-
sectional
area
[mm²]
Current-carrying capacities in [A]
Reference Method C
(Clipped direct)
Reference Method E
(in free air or
in perforated cable tray
horizontal or vertical)
Reference Method F
(direct in ground or in ducting
in ground, in or around buildings)
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1 two-core
cable,single-phase
AC or DC
1 three-core
cable or
1 four-core
cable
three-phase
AC
1234567
16827185747159
2510892112989075
3513211313812010890
50159137166145128106
70201174211185158130
95242214254224186154
120249264174
150284305197
185328350220
240386418253
300441488286