KW to Cable Size Calculator

Load (kW)	Cable Size (mm²)
4.5	2.5 - 4
6.2	4 - 6
7.2	4 - 6
7.4	4 - 6
7.5	6 - 10
8.5	6 - 10
9.2	6 - 10
9.5	6 - 10
10	6 - 10
10.5	6 - 10
12	10 - 16
22	16 - 25
50	35 - 50

FAQs

1. How do you calculate kW to cable size? Calculating cable size involves considering factors like current, voltage, distance, and safety regulations. The specific formula will depend on these factors.
2. What size cable for 10 kW? Cable size depends on factors like voltage and distance. For a rough estimate, you might need around 6mm² to 10mm² cable for a 10 kW load at 230V.
3. What size cable for 7.2 kW? For a 7.2 kW load at 230V, a cable around 4mm² to 6mm² might be suitable.
4. What size cable is required for a 50 kW load? A 50 kW load at 230V might require a cable around 35mm² to 50mm² or more, depending on distance and other factors.
5. What size cable for 7.5 kW? A 7.5 kW load at 230V might need a cable around 6mm² to 10mm².
6. What cable for 9.5 kW? For a 9.5 kW load at 230V, a cable around 6mm² to 10mm² might be suitable.
7. What size cable do I need for 8.5 kW? For an 8.5 kW load at 230V, a cable around 6mm² to 10mm² might work.
8. What cable size for 12 kW? A 12 kW load at 230V might need a cable around 10mm² to 16mm².
9. What cable is required for 10 kW load? For a 10 kW load at 230V, a cable around 6mm² to 10mm² might be appropriate.
10. What size cable for a 7.4 kW car charger? A 7.4 kW car charger at 230V might require a cable around 4mm² to 6mm².
11. What size cable for 10.5 kW? For a 10.5 kW load at 230V, a cable around 6mm² to 10mm² might be suitable.
12. What size cable for 6.2 kW? A 6.2 kW load at 230V might need a cable around 4mm² to 6mm².
13. What size cable is 22 kW? A 22 kW load at 230V might require a cable around 16mm² to 25mm² or more.
14. What is the formula for cable size for load? The formula for cable size calculation involves considering factors like current, voltage drop, and distance. A common formula is I²R, where I is current and R is resistance.
15. What size cable do I need for 200 amp service? For a 200 amp service, cable size will depend on factors like distance and voltage. Generally, larger cables such as 70mm² to 120mm² might be used.
16. What cable do I need for an 8.5 kW shower? For an 8.5 kW shower, a cable around 6mm² to 10mm² might be appropriate.
17. What size cable for a 7 kW charger? A 7 kW charger might need a cable around 4mm² to 6mm².
18. Can a 7.5 kW shower run on 6mm cable? It's recommended to use a cable size that can handle the load safely. For a 7.5 kW shower, a cable around 6mm² to 10mm² is usually recommended.
19. Can I replace an 8.5 kW shower with a 9.5 kW shower? Upgrading a shower's kW rating might require upgrading the cable size as well. Consult a professional electrician for accurate advice.
20. What size cable for 9.2 kW? For a 9.2 kW load at 230V, a cable around 6mm² to 10mm² might be suitable.
21. Can I replace an 8.5 kW shower with a 10.5 kW shower? Increasing the shower's kW rating might necessitate a larger cable size. Consult an electrician for proper guidance.
22. What size cable for 4.5 kW? A 4.5 kW load at 230V might require a cable around 2.5mm² to 4mm².
23. What size breaker do I need for a 7.5 kW shower? Breaker size depends on cable and load specifications. For a 7.5 kW shower, a 32A breaker might be suitable.
24. Is a 9.5 kW shower powerful? A 9.5 kW shower can be considered powerful and capable of delivering a comfortable flow of hot water.
25. How do you determine cable size? Cable size is determined based on factors like load current, voltage, distance, and safety regulations. Proper calculation is important to ensure safety and performance.
26. What size cable for 5000 watts? Cable size depends on voltage and distance. For a rough estimate, you might need around 4mm² to 6mm² cable for 5000 watts at 230V.
27. What size cable for a 4 kW oven? For a 4 kW oven at 230V, a cable around 2.5mm² to 4mm² might be suitable.
28. What size wire do I need for a 7500 watt generator? For a 7500 watt generator, a cable around 6mm² to 10mm² might be appropriate.
29. What cable do I need for a 100 amp breaker? For a 100 amp breaker, cable size might range from 25mm² to 35mm² or more, depending on distance and regulations.
30. What size cable do I need for a 10 amp breaker? For a 10 amp breaker, a cable around 1.5mm² to 2.5mm² might be suitable.
31. What cable for 7 kW EV charger? A 7 kW EV charger might need a cable around 4mm² to 6mm².
32. How fast is a 7.4 kW home charger? A 7.4 kW home charger can roughly add around 25-30 miles of range per hour of charging, depending on the EV model.
33. How many amps is a 7.4 kW charger? Amps can be calculated using the formula: Amps = Power (kW) / Voltage (V). For a 7.4 kW charger at 230V, it would be around 32 amps.
34. What gauge wire for 10,000 watts? Wire gauge depends on factors like voltage and distance. For a rough estimate, you might need around 10mm² to 16mm² cable for 10,000 watts at 230V.
35. What size cable for 1000 watts? For 1000 watts at 230V, a cable around 1.5mm² to 2.5mm² might be suitable.
36. Which cable used for an underground system having more than 25 kW load? For an underground system with more than 25 kW load, larger cables like 50mm² to 70mm² might be used, depending on various factors.
37. How many kW is a 3-pin car charger? A 3-pin car charger is typically rated at 2.3 kW or 10A at 230V.
38. What level is a 6.6 kW charger? A 6.6 kW charger is considered Level 2 charging, which is common for home and public charging stations.
39. What does a 7.4 kW charger mean? A 7.4 kW charger can deliver up to 7.4 kilowatts of power, which determines its charging speed for electric vehicles.
40. Can I run a 10.8 kW shower on 10mm cable? A 10.8 kW shower might require a cable size larger than 10mm². Consult an electrician for accurate guidance.
41. How many amps is a 10/4 SO cord rated for? A 10/4 SO cord is typically rated for around 30 amps.
42. How many amps does a 9.5 kW shower use? Amps can be calculated using the formula: Amps = Power (kW) / Voltage (V). For a 9.5 kW shower at 230V, it would be around 41.3 amps.
43. What size cable for 6000 watts? For 6000 watts at 230V, a cable around 4mm² to 6mm² might be suitable.
44. What size cable for 3.5 kW? For 3.5 kW at 230V, a cable around 2.5mm² might be suitable.
45. How many watts can 6 AWG handle? Wire gauge determines the current-carrying capacity. A 6 AWG wire can handle around 55-60 amps, which translates to approximately 13,000-14,400 watts at 230V.
46. What size cable do I need for a 22 kW car charger? For a 22 kW car charger at 230V, a cable around 16mm² to 25mm² might be appropriate.
47. Is 22 kW a rapid charger? Yes, 22 kW is considered a rapid charger for electric vehicles. It can provide faster charging compared to lower power chargers.
48. Do I need a 22 kW charger at home? A 22 kW charger might be more suitable for public or commercial charging. For home use, a 7 kW or 11 kW charger is often sufficient.
49. How do you calculate load size? Load size is calculated by considering the power consumption of all devices connected to a circuit. Sum up the wattages of all devices to determine the total load.
50. What is the NEC code for cable sizing? The National Electrical Code (NEC) provides guidelines for cable sizing based on factors like current, voltage drop, and distance. Specific code references can vary based on the edition of the NEC.
51. How to do a full cable calculation? A full cable calculation involves considering load current, voltage drop, cable length, ambient temperature, and more. It's a complex process that often requires using engineering software or consulting professionals.
52. What size of wire from a 200 amp service to 100 amp? The wire size from a 200 amp service to a 100 amp subpanel might be around 3/0 AWG copper or 2/0 AWG aluminum, depending on distance and regulations.
53. What size wire is needed for 300 amp service? The wire size for a 300 amp service depends on factors like distance and regulations. It might range from 250 MCM to 500 MCM or larger.
54. How many circuits can you have on a 200 amp service? The number of circuits on a 200 amp service depends on the distribution panel's capacity and the load of the individual circuits. It can accommodate many circuits, but exact numbers vary.
55. What size cable do I need for 8.5 kW? For an 8.5 kW load at 230V, a cable around 6mm² to 10mm² might be suitable.
56. What cable for 9.5 kW? For a 9.5 kW load at 230V, a cable around 6mm² to 10mm² might be appropriate.
57. Can I replace a 7.5 kW shower with an 8.5 kW? It's possible to replace a 7.5 kW shower with an 8.5 kW one, but ensure that the existing cable can handle the increased load. Consult an electrician for guidance.
58. What size cable for a 7.4 kW car charger? For a 7.4 kW car charger at 230V, a cable around 4mm² to 6mm² might be suitable.
59. What size wire do I need for a 50 amp EV charger? For a 50 amp EV charger, a cable around 6mm² to 10mm² might be appropriate.
60. What size wire do I need for a Level 2 car charger? The wire size for a Level 2 car charger depends on the charger's rating and the distance from the electrical panel. Generally, 6mm² to 10mm² might be suitable.
61. Is 10mm cable OK for a 10.5 kW shower? It's recommended to consult an electrician to determine if 10mm cable is suitable for a 10.5 kW shower, as cable size requirements vary based on multiple factors.
62. What is the difference between 7.5 kW and 8.5 kW shower? The difference lies in the power output. A 7.5 kW shower delivers less heating power than an 8.5 kW shower, resulting in potentially lower water temperature.
63. What is the difference between an 8.5 kW shower and a 9.5 kW shower? The difference is in the power output. An 8.5 kW shower has lower heating power than a 9.5 kW shower, which could affect water temperature and flow rate.
64. Is 6mm cable OK for a 9.5 kW shower? Using 6mm cable for a 9.5 kW shower might not be sufficient to handle the load safely. It's advisable to consult an electrician for proper cable sizing.
65. What is the flow rate of a 10.5 kW electric shower? The flow rate of an electric shower is measured in liters per minute (LPM) or gallons per minute (GPM) and depends on the specific shower model.
66. What size cable for 6.2 kW? For a 6.2 kW load at 230V, a cable around 4mm² to 6mm² might be suitable.
67. What size cable for 7.2 kW? For a 7.2 kW load at 230V, a cable around 4mm² to 6mm² might be suitable.
68. Can I run a 9.5 kW shower on 10mm cable? Running a 9.5 kW shower on 10mm cable might be possible, but it's recommended to consult an electrician to ensure the cable can handle the load safely.
69. Can you fit an 8.5 kW shower with 10mm cable? Whether you can fit an 8.5 kW shower with 10mm cable depends on various factors, including distance, regulations, and load requirements. Consult an electrician for accurate advice.
70. How many kW can a 2.5mm cable take? A 2.5mm cable might handle around 3.5 kW to 4.5 kW load at 230V, but it's important to check specific cable specifications and regulations.
71. What does a 10 kW wire take? The term "10 kW wire" isn't standard. Wire size depends on various factors, including current, voltage, and distance. For a rough estimate, you might need around 6mm² to 10mm² cable for a 10 kW load at 230V.
72. What size wire for 7.5 kW? Wire size depends on voltage and distance. For a rough estimate, you might need around 6mm² to 10mm² cable for 7.5 kW at 230V.
73. Can I replace an 8.5 kW shower with a 9.5 kW shower? Upgrading a shower's kW rating might require upgrading the cable size as well. Consult an electrician for proper guidance.
74. Can I replace an 8.5 kW shower with a 10.5 kW shower? Increasing the shower's kW rating might necessitate a larger cable size. Consult an electrician for proper guidance.
75. What size cable for 4.5 kW? For a 4.5 kW load at 230V, a cable around 2.5mm² to 4mm² might be suitable.
76. What size breaker do I need for a 7.5 kW shower? Breaker size depends on cable and load specifications. For a 7.5 kW shower, a 32A breaker might be suitable.
77. Is a 9.5 kW shower powerful? A 9.5 kW shower can be considered powerful and capable of delivering a comfortable flow of hot water.