Cable glands selection
To fulfill its function, especially tear strength and ingress protection, cable gland must be adapted to the diameter of the cable.
This diameter is a function of several parameters: the number of conductors, electrical power, voltage insulation, cable length and type of mechanical protection depending its application
The selection must be done in 3 steps
Step 1: selection of cable Gauge, upon power and maximum length of cables, single phase and three phase.
| Gauge, mm² | Single phase 230V, power factor =1 | 3 phase, power factor = 0.8 | ||||
| Power (kw) | Electrical rating, (A) |
Maximum cable length, with voltage drop less than 3% (m) |
Power (kw) | Electrical rating, (A) |
Maximum cable length, with voltage drop less than 5% (m) |
|
| 1.5 | 1 | 4.6 | 50 | |||
| 1.5 | 6.8 | 33 | ||||
| 2 | 9 | 25 | ||||
| 2.5 | 11.5 | 20 | 2.5 | 5 | 190 | |
| 3 | 13.5 | 17 | 3 | 6 | 160 | |
| 3.5 | 16 | 14 | 3.5 | 7 | 135 | |
| 4 | 8 | 120 | ||||
| 4.5 | 9 | 105 | ||||
| 5 | 10 | 96 | ||||
| 6 | 12 | 79 | ||||
| 7 | 14 | 68 | ||||
| 8 | 16 | 60 | ||||
| 9 | 18 | 51 | ||||
| 2.5 | 1 | 4.6 | 84 | |||
| 1.5 | 6.8 | 57 | ||||
| 2 | 9 | 43 | ||||
| 2.5 | 11.5 | 34 | 2.5 | 5 | 325 | |
| 3 | 13.5 | 29 | 3 | 6 | 270 | |
| 3.5 | 16 | 24 | 3.5 | 7 | 230 | |
| 4 | 18 | 21 | 4 | 8 | 200 | |
| 4.5 | 20 | 19 | 4.5 | 9 | 180 | |
| 5 | 10 | 165 | ||||
| 6 | 12 | 135 | ||||
| 7 | 14 | 115 | ||||
| 8 | 16 | 105 | ||||
| 9 | 18 | 92 | ||||
| 10 | 19 | 84 | ||||
| 12 | 23 | 69 | ||||
| 4 | 1 | 4.6 | 135 | |||
| 1.5 | 6.8 | 90 | ||||
| 2 | 9 | 88 | ||||
| 2.5 | 11.5 | 54 | 2.5 | 5 | 510 | |
| 3 | 13.5 | 45 | 3 | 6 | 420 | |
| 3.5 | 16 | 39 | 3.5 | 7 | 365 | |
| 4 | 18 | 34 | 4 | 8 | 320 | |
| 4.5 | 20 | 30 | 4.5 | 9 | 285 | |
| 5 | 23 | 27 | 5 | 10 | 255 | |
| 6 | 27 | 23 | 6 | 12 | 210 | |
| 7 | 14 | 180 | ||||
| 8 | 16 | 160 | ||||
| 9 | 18 | 145 | ||||
| 10 | 19 | 130 | ||||
| 12 | 23 | 110 | ||||
| 14 | 27 | 94 | ||||
| 16 | 31 | 81 | ||||
Step 2: depending of application, select insulation and mechanical protection, and find cable outside diameter (Most usual flexible cables)
| Gauge, mm² | H05-VVF 500V, PVC insulation |
Cable gland size | H05-RRF 500V, rubber insulation |
Cable gland size | H07-RNF, 450/750 V. Can be used in fixed installations with nominal voltages up to 1000V: see NF G 15-100, 512.1.1. Excellent resistance to weathering, oils and fats, resistance to mechanical and thermal stresses, outdoor use, hazardous areas, agricultural areas, connecting mobile devices |
Cable gland size |
| 3 x 1 | 6.8 | M16 | 8.5 | M16 | 11.5 | M20, M24 |
| 3 x 1.5 | 7.2 | M16 | 10.4 | M20 | 12.5 | M20, M24 |
| 3 x 2.5 | 8 | M16, M20 | 12.4 | M20, M24 | 14.5 | M24, M25 |
| 3 x 4 | 10 | M16, M20 | 14.5 | M24, M25 | 16 | M24, M25 |
| 5 x 1 | 9.8 | M16, M20 | 10.3 | M20 | 13.5 | M24, M25 |
| 5 x 1.5 | 11.6 | M20, M24 | 12.7 | M20, M24 | 15 | M24, M25 |
| 5 x 2.5 | 13.9 | M24, M25 | 15.3 | M24, M25 | 17 | M25 |
| 5 x 4 | 16 | M24-M25 |
Step 3: select cable gland size upon its internal diameter ranges (standard models used in this catalogue)
| Models | M16 | M20 | M24 | M25 |
| Min and max dia. | 6-10 | 8-13 | 11-16 | 13-18 |