Technical Resources
We have gathered together a number of technical resources for use as reference on electrical projects.
DISCLAIMER: The information on this page and the PDF is for information only and R&M Electrical Group Ltd can not be held liable for any information therein.
Cable: PVC Flexes
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PVC Flexes: BS 6141 & BS 6500
Table 4F3A - flexible cords, non-armoured (copper conductors)
Current Carrying Capacity
Current-carrying capacity Conductor cross-sectional Single-phase A.C. area | Current-carrying capacity | Maximum mass supportable by Three-phase A.C. twin flexible cord (see Regulations 522.7.2 and 559.6.1.5) | |
---|---|---|---|
D.C. or single-phase A.C | Three-phase A.C. | ||
mm2 | A | A | kg |
0.5 | 3 | 3 | 2 |
0.75 | 6 | 6 | 3 |
1 | 10 | 10 | 5 |
1.25 | 13 | - | 5 |
1.5 | 16 | 16 | 5 |
2.5 | 25 | 20 | 5 |
4 | 32 | 25 | 5 |
RATING FACTOR FOR AMBIENT TEMPERATURE
60ºC thermoplastic or thermosetting insulated cords:
Ambient temperature | 35ºC | 40ºC | 45ºC | 50ºC | 55ºC |
---|---|---|---|---|---|
Rating Factor | 0.91 | 0.82 | 0.71 | 0.58 | 0.41 |
90ºC thermoplastic or thermosetting insulated cords:
Ambient temperature | 35ºC to 50ºC | 55ºC | 60ºC | 65ºC | 70ºC |
---|---|---|---|---|---|
Rating Factor | 1 | 0.96 | 0.83 | 0.67 | 0.47 |
Glass fibre cords:
Ambient temperature | 35ºC to 150ºC | 155ºC | 160ºC | 165ºC | 170ºC | 175ºC |
---|---|---|---|---|---|---|
Rating Factor | 1 | 0.92 | 0.82 | 0.71 | 0.57 | 0.4 |
180ºC thermoplastic or thermosetting insulated cords:
Ambient temperature | 35ºC to 120ºC | 125ºC | 130ºC | 135ºC | 140ºC | 145ºC |
---|---|---|---|---|---|---|
Rating Factor | 1 | 0.96 | 0.85 | 0.74 | 0.6 | 0.42 |
VOLTAGE DROP
Table 4F3B Conductor operating temperature: 60ºC
Conductor cross-sectional area | D.C. or single-phase A.C | Three-phase A.C. |
---|---|---|
mm2 | A | mV/A/m |
0.5 | 93 | 80 |
0.75 | 62 | 54 |
1 | 46 | 40 |
1.25 | 37 | - |
1.5 | 32 | 27 |
2.5 | 19 | 16 |
4 | 12 | 10 |
NOTE: *The tabulated values above are for 60ºc thermoplastic or thermosetting insulated flexible cords and for other types of flexible cords they are to be multiplied by the following factors:
FOR: 90ºC thermoplastic or thermosetting insulated | 1.09 |
---|---|
180ºC thermosetting insulated | 1.31 |
185ºC glass fibre | 1.43 |
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