BS 6004 624-Y Twin and Earth PVC Cable
Application
Domestic wiring cable. Can be installed in fixed installations in dry or damp premises clipped to surface, on trays or in free air where the risk of mechanical damage would not be an issue. Suitable for laying in conduit or trunking where mechanical protection is required.
Characteristics
Voltage Rating Uo/U
300/500V
Temperature Rating:
-5°C to +70°C
Minimum Bending Radius Fixed:
6 x overall diameter
Construction
Conductor
RE: 1mm² to 2.5mm² : Class 1 solid copper
RM: 4mm² to 16mm² : Class 2 stranded copper
Circuit Protection Conductor (Earth)
1mm² to 2.5mm² : Class 1 solid copper
4mm² to 16mm² : Class 2 stranded copper
Insulation
PVC (Polyvinyl Chloride)
Sheath
PVC (Polyvinyl Chloride)
Core Identification
2 core: • Blue • Brown
3 core: • Brown • Black • Grey
Sheath Colour
• Grey
Dimension
| Cores | Nominal Cross Sectional Area (mm²) | Nominal Thickness of Insulation (mm) | Nominal Overall Diameter (mm) | Nominal Overall Diameter (mm) | Nominal Overall Diameter (mm) | Nominal Overall Diameter (mm) | Normal Weight (kg/km) |
|---|---|---|---|---|---|---|---|
| 2 | 1 | 1 | 1 | 0.6 | 0.9 | 4.35 x 7.95 | 68 |
| 2 | 1.5 | 1 | 1 | 0.7 | 0.9 | 4.85 x 8.9 | 87 |
| 2 | 2.5 | 1 | 1.5 | 0.8 | 1 | 5.65 x 10.65 | 120 |
| 2 | 4 | 2 | 1.5 | 0.8 | 1 | 6.3 x 11.95 | 172 |
| 2 | 6 | 2 | 2.5 | 0.8 | 1.1 | 7.1 x 13.7 | 235 |
| 2 | 10 | 2 | 4* | 1 | 1.2 | 8.7 x 17.25 | 373 |
| 2 | 16 | 2 | 6* | 1 | 1.3 | 9.85 x 20 | 530 |
| 3 | 1 | 1 | 1 | 0.6 | 0.9 | 4.35 x 9.8 | 91 |
| 3 | 1.5 | 1 | 1 | 0.7 | 0.9 | 4.85 x 11.2 | 115 |
Conductors
Class 1 Solid Conductors for Single Core and Multi-Core Cables
| Nominal Cross Sectional Area (mm²) | Maximum Resistance of Conductor at 20ºC (ohms/km) |
|---|---|
| Plain Wires | |
| 1 | 18.1 |
| 1.5 | 12.1 |
| 2.5 | 7.41 |
Class 2 Stranded Conductors for Single Core and Multi-Core Cables
| Nominal Cross Sectional Area (mm²) | Minimum No. of Wires in Conductor | Maximum Resistance of Conductor at 20ºC (ohms/km) |
|---|---|---|
| Circular | Annealed Copper Conductor | |
| Plain Wires | ||
| 4 | 7 | 4.61 |
| 6 | 7 | 3.08 |
| 10 | 7 | 1.83 |
| 16 | 7 | 1.15 |
Current - Carrying Capacity (amperes) and Voltage Drop (per ampere per metre):
Ambient temperature: 30°C
Conductor operating temperature: 70°C
| Conductor crosssectional area | Method 100# (above a plasterboard ceiling covered by thermal insulation exceeding 100mm in thickness) | Method 101# (above a plasterboard ceiling covered by thermal insulation exceeding 100mm in thickness) | Method 102# (in a stud wall with thermal insulation with cable touching the inner wall surface) | Method 103# (in a stud wall with thermal insulation with cable not touching the inner wall surface) | Reference Method C* (clipped direct) | Reference Method A* (enclosed in conduit in an insulated wall) | Voltage drop (per ampere per metre) |
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| (mm²) | (A) | (A) | (A) | (A) | (A) | (A) | (mV/A/m) |
| 1 | 13 | 10.5 | 13 | 8 | 16 | 11.5 | 44 |
| 1.5 | 16 | 13 | 16 | 10 | 20 | 14.5 | 29 |
| 2.5 | 17 | 21 | 13.5 | 13.5 | 27 | 20 | 18 |
| 4 | 22 | 27 | 18.5 | 18.5 | 37 | 26 | 11 |
| 6 | 27 | 35 | 24 | 23.5 | 47 | 32 | 7.3 |
| 10 | 36 | 47 | 32 | 32 | 64 | 44 | 4.4 |
| 16 | 46 | 63 | 42.5 | 42.5 | 85 | 57 | 2.8 |
A* - For full installation method refer to Table 4A2 Installation Method 2 but for flat twin and earth cable
C* - For full installation method refer to Table 4A2 Installation Method 20 but for flat twin and earth cable 100# - For full installation method refer to Table 4A2 Installation Method 100
101# - For full installation method refer to Table 4A2 Installation Method 101
102# - For full installation method refer to Table 4A2 Installation Method 102
103# - For full installation method refer to Table 4A2 Installation Method 103
Wherever practicable, a cable is to be fixed in a position such that it will not be covered with thermal insulation. Regulation 523.9, BS 5803-5:
Appendix C: Avoidance of overheating of electric cables.
Building Regulations Approved Document B and Thermal insulation: avoiding risks, BR 262, BRE, 2001 refer.
BS 7211 624-B Twin and Earth
Application
Installation in walls, on boards and in channels or embedded in plaster. For installations where fire, smoke emissions and toxic fumes create a potential risk to life and equipment.
Characteristics
Voltage Rating Uo/U
300/500V
Temperature Rating:
+5°C to +70°C
Minimum Bending Radius Fixed:
3 x overall diameter
Construction
Conductor
1mm² to 2.5mm² : Class 1 solid copper
4mm² to 16mm² : Class 2 stranded copper
Circuit Protection Conductor (Earth)
1mm² to 2.5mm² : Class 1 solid copper conductor
4mm² to 16mm² : Class 2 stranded copper conductor
Insulation
XLPE (Cross-Linked Polyethylene)
Sheath
LSZH (Low Smoke Zero Halogen)
Core Identification
2 core: • Blue • Brown
3 core: • Brown • Black • Grey
Sheath Colour
• White
Dimension
| Cores | Conductor Class | Nominal Cross Sectional Area (mm²) | Nominal Thickness of Insulation (mm) | Nominal Thickness of Sheath (mm) | Nominal Overall Diameter (mm) |
|---|---|---|---|---|---|
| 2 | 1 | 1 | 0.6 | 0.9 | 4.8 x 8.4 |
| 2 | 1 | 1.5 | 0.7 | 0.9 | 4.8 x 9.2 |
| 2 | 1 | 2.5 | 0.8 | 1 | 5.7 x 10.5 |
| 2 | 2 | 4 | 0.8 | 1 | 6.1 x 11.7 |
| 2 | 2 | 6 | 0.8 | 1.1 | 6.9 x 13.6 |
| 2 | 2 | 10 | 1 | 1.2 | 8.1 x 16.2 |
| 3 | 1 | 1 | 0.6 | 0.9 | 4.7 x 11 |
| 3 | 1 | 1.5 | 0.7 | 0.9 | 4.9 x 11.8 |
| 3 | 1 | 2.5 | 0.8 | 1 | 5.6 x 13.3 |
| 3 | 2 | 4 | 0.8 | 1 | 6.2 x 15.7 |
Conductors
Class 1 Solid Conductors for Single Core and Multi-Core Cables
| Nominal Cross Sectional Area (mm²) | Maximum Resistance of Conductor at 20ºC (ohms/km) |
|---|---|
| Plain Wires | |
| 1 | 18.1 |
| 1.5 | 12.1 |
| 2.5 | 7.41 |
| 4 | 4.61 |
| 6 | 3.08 |
| 10 | 1.83 |
Electrical Characteristics
Current Carrying Capacity
| Nominal Cross Sectional Area (mm²) | Reference Method A* (In Conduit in Wall) Amps | Reference Method C* (Clipped Direct) Amps | Voltage Drop mv/A/m |
|---|---|---|---|
| 1 | 11.5 | 16 | 44 |
| 1.5 | 14.5 | 20 | 29 |
| 2.5 | 20 | 27 | 18 |
| 4 | 26 | 37 | 11 |
| 6 | 32 | 47 | 7.3 |
| 10 | 44 | 64 | 4.4 |
| 16 | 57 | 85 | 2.8 |
The above table is in accordance with 4D5 of the 18th Edition of IEE Wiring Regulations BS7671 and IEC 60364-5-52
Note:
A* For full installation method refer to Table 4A2 Installation Method 2 but for flat twin and earth cable of the 18th Edition of IEE Wiring Regulations.
C* For full installation method refer to Table 4A2 Installation Method 20 but for flat twin and earth cable of the 18th Edition of IEE Wiring Regulations.
BS 6004 624-Y Twin and Earth PVC Cable
Application
Domestic wiring cable. Can be installed in fixed installations in dry or damp premises clipped to surface, on trays or in free air where the risk of mechanical damage would not be an issue. Suitable for laying in conduit or trunking where mechanical protection is required.
Characteristics
Voltage Rating Uo/U
300/500V
Temperature Rating:
-5°C to +70°C
Minimum Bending Radius Fixed:
6 x overall diameter
Construction
Conductor
RE: 1mm² to 2.5mm² : Class 1 solid copper
RM: 4mm² to 16mm² : Class 2 stranded copper
Circuit Protection Conductor (Earth)
1mm² to 2.5mm² : Class 1 solid copper
4mm² to 16mm² : Class 2 stranded copper
Insulation
PVC (Polyvinyl Chloride)
Sheath
PVC (Polyvinyl Chloride)
Core Identification
2 core: • Blue • Brown
3 core: • Brown • Black • Grey
Sheath Colour
• Grey
Dimension
| Cores | Nominal Cross Sectional Area (mm²) | Nominal Thickness of Insulation (mm) | Nominal Overall Diameter (mm) | Nominal Overall Diameter (mm) | Nominal Overall Diameter (mm) | Nominal Overall Diameter (mm) | Normal Weight (kg/km) |
|---|---|---|---|---|---|---|---|
| 2 | 1 | 1 | 1 | 0.6 | 0.9 | 4.35 x 7.95 | 68 |
| 2 | 1.5 | 1 | 1 | 0.7 | 0.9 | 4.85 x 8.9 | 87 |
| 2 | 2.5 | 1 | 1.5 | 0.8 | 1 | 5.65 x 10.65 | 120 |
| 2 | 4 | 2 | 1.5 | 0.8 | 1 | 6.3 x 11.95 | 172 |
| 2 | 6 | 2 | 2.5 | 0.8 | 1.1 | 7.1 x 13.7 | 235 |
| 2 | 10 | 2 | 4* | 1 | 1.2 | 8.7 x 17.25 | 373 |
| 2 | 16 | 2 | 6* | 1 | 1.3 | 9.85 x 20 | 530 |
| 3 | 1 | 1 | 1 | 0.6 | 0.9 | 4.35 x 9.8 | 91 |
| 3 | 1.5 | 1 | 1 | 0.7 | 0.9 | 4.85 x 11.2 | 115 |
Conductors
Class 1 Solid Conductors for Single Core and Multi-Core Cables
| Nominal Cross Sectional Area (mm²) | Maximum Resistance of Conductor at 20ºC (ohms/km) |
|---|---|
| Plain Wires | |
| 1 | 18.1 |
| 1.5 | 12.1 |
| 2.5 | 7.41 |
Class 2 Stranded Conductors for Single Core and Multi-Core Cables
| Nominal Cross Sectional Area (mm²) | Minimum No. of Wires in Conductor | Maximum Resistance of Conductor at 20ºC (ohms/km) |
|---|---|---|
| Circular | Annealed Copper Conductor | |
| Plain Wires | ||
| 4 | 7 | 4.61 |
| 6 | 7 | 3.08 |
| 10 | 7 | 1.83 |
| 16 | 7 | 1.15 |
Current - Carrying Capacity (amperes) and Voltage Drop (per ampere per metre):
Ambient temperature: 30°C
Conductor operating temperature: 70°C
| Conductor crosssectional area | Method 100# (above a plasterboard ceiling covered by thermal insulation exceeding 100mm in thickness) | Method 101# (above a plasterboard ceiling covered by thermal insulation exceeding 100mm in thickness) | Method 102# (in a stud wall with thermal insulation with cable touching the inner wall surface) | Method 103# (in a stud wall with thermal insulation with cable not touching the inner wall surface) | Reference Method C* (clipped direct) | Reference Method A* (enclosed in conduit in an insulated wall) | Voltage drop (per ampere per metre) |
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| (mm²) | (A) | (A) | (A) | (A) | (A) | (A) | (mV/A/m) |
| 1 | 13 | 10.5 | 13 | 8 | 16 | 11.5 | 44 |
| 1.5 | 16 | 13 | 16 | 10 | 20 | 14.5 | 29 |
| 2.5 | 17 | 21 | 13.5 | 13.5 | 27 | 20 | 18 |
| 4 | 22 | 27 | 18.5 | 18.5 | 37 | 26 | 11 |
| 6 | 27 | 35 | 24 | 23.5 | 47 | 32 | 7.3 |
| 10 | 36 | 47 | 32 | 32 | 64 | 44 | 4.4 |
| 16 | 46 | 63 | 42.5 | 42.5 | 85 | 57 | 2.8 |
A* - For full installation method refer to Table 4A2 Installation Method 2 but for flat twin and earth cable
C* - For full installation method refer to Table 4A2 Installation Method 20 but for flat twin and earth cable 100# - For full installation method refer to Table 4A2 Installation Method 100
101# - For full installation method refer to Table 4A2 Installation Method 101
102# - For full installation method refer to Table 4A2 Installation Method 102
103# - For full installation method refer to Table 4A2 Installation Method 103
Wherever practicable, a cable is to be fixed in a position such that it will not be covered with thermal insulation. Regulation 523.9, BS 5803-5:
Appendix C: Avoidance of overheating of electric cables.
Building Regulations Approved Document B and Thermal insulation: avoiding risks, BR 262, BRE, 2001 refer.
BS 7211 624-B Twin and Earth
Application
Installation in walls, on boards and in channels or embedded in plaster. For installations where fire, smoke emissions and toxic fumes create a potential risk to life and equipment.
Characteristics
Voltage Rating Uo/U
300/500V
Temperature Rating:
+5°C to +70°C
Minimum Bending Radius Fixed:
3 x overall diameter
Construction
Conductor
1mm² to 2.5mm² : Class 1 solid copper
4mm² to 16mm² : Class 2 stranded copper
Circuit Protection Conductor (Earth)
1mm² to 2.5mm² : Class 1 solid copper conductor
4mm² to 16mm² : Class 2 stranded copper conductor
Insulation
XLPE (Cross-Linked Polyethylene)
Sheath
LSZH (Low Smoke Zero Halogen)
Core Identification
2 core: • Blue • Brown
3 core: • Brown • Black • Grey
Sheath Colour
• White
Dimension
| Cores | Conductor Class | Nominal Cross Sectional Area (mm²) | Nominal Thickness of Insulation (mm) | Nominal Thickness of Sheath (mm) | Nominal Overall Diameter (mm) |
|---|---|---|---|---|---|
| 2 | 1 | 1 | 0.6 | 0.9 | 4.8 x 8.4 |
| 2 | 1 | 1.5 | 0.7 | 0.9 | 4.8 x 9.2 |
| 2 | 1 | 2.5 | 0.8 | 1 | 5.7 x 10.5 |
| 2 | 2 | 4 | 0.8 | 1 | 6.1 x 11.7 |
| 2 | 2 | 6 | 0.8 | 1.1 | 6.9 x 13.6 |
| 2 | 2 | 10 | 1 | 1.2 | 8.1 x 16.2 |
| 3 | 1 | 1 | 0.6 | 0.9 | 4.7 x 11 |
| 3 | 1 | 1.5 | 0.7 | 0.9 | 4.9 x 11.8 |
| 3 | 1 | 2.5 | 0.8 | 1 | 5.6 x 13.3 |
| 3 | 2 | 4 | 0.8 | 1 | 6.2 x 15.7 |
Conductors
Class 1 Solid Conductors for Single Core and Multi-Core Cables
| Nominal Cross Sectional Area (mm²) | Maximum Resistance of Conductor at 20ºC (ohms/km) |
|---|---|
| Plain Wires | |
| 1 | 18.1 |
| 1.5 | 12.1 |
| 2.5 | 7.41 |
| 4 | 4.61 |
| 6 | 3.08 |
| 10 | 1.83 |
Electrical Characteristics
Current Carrying Capacity
| Nominal Cross Sectional Area (mm²) | Reference Method A* (In Conduit in Wall) Amps | Reference Method C* (Clipped Direct) Amps | Voltage Drop mv/A/m |
|---|---|---|---|
| 1 | 11.5 | 16 | 44 |
| 1.5 | 14.5 | 20 | 29 |
| 2.5 | 20 | 27 | 18 |
| 4 | 26 | 37 | 11 |
| 6 | 32 | 47 | 7.3 |
| 10 | 44 | 64 | 4.4 |
| 16 | 57 | 85 | 2.8 |
The above table is in accordance with 4D5 of the 18th Edition of IEE Wiring Regulations BS7671 and IEC 60364-5-52
Note:
A* For full installation method refer to Table 4A2 Installation Method 2 but for flat twin and earth cable of the 18th Edition of IEE Wiring Regulations.
C* For full installation method refer to Table 4A2 Installation Method 20 but for flat twin and earth cable of the 18th Edition of IEE Wiring Regulations.
BS 6004 624-Y Twin and Earth PVC Cable
Application
Domestic wiring cable. Can be installed in fixed installations in dry or damp premises clipped to surface, on trays or in free air where the risk of mechanical damage would not be an issue. Suitable for laying in conduit or trunking where mechanical protection is required.
Characteristics
Voltage Rating Uo/U
300/500V
Temperature Rating:
-5°C to +70°C
Minimum Bending Radius Fixed:
6 x overall diameter
Construction
Conductor
RE: 1mm² to 2.5mm² : Class 1 solid copper
RM: 4mm² to 16mm² : Class 2 stranded copper
Circuit Protection Conductor (Earth)
1mm² to 2.5mm² : Class 1 solid copper
4mm² to 16mm² : Class 2 stranded copper
Insulation
PVC (Polyvinyl Chloride)
Sheath
PVC (Polyvinyl Chloride)
Core Identification
2 core: • Blue • Brown
3 core: • Brown • Black • Grey
Sheath Colour
• Grey
BS 7211 624-B Twin and Earth
Application
Installation in walls, on boards and in channels or embedded in plaster. For installations where fire, smoke emissions and toxic fumes create a potential risk to life and equipment.
Characteristics
Voltage Rating Uo/U
300/500V
Temperature Rating:
+5°C to +70°C
Minimum Bending Radius Fixed:
3 x overall diameter
Construction
Conductor
1mm² to 2.5mm² : Class 1 solid copper
4mm² to 16mm² : Class 2 stranded copper
Circuit Protection Conductor (Earth)
1mm² to 2.5mm² : Class 1 solid copper conductor
4mm² to 16mm² : Class 2 stranded copper conductor
Insulation
XLPE (Cross-Linked Polyethylene)
Sheath
LSZH (Low Smoke Zero Halogen)
Core Identification
2 core: • Blue • Brown
3 core: • Brown • Black • Grey
Sheath Colour
• White
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