# How do you calculate kW to cable size?

## How do you calculate kW to cable size?

Ok, let’s dive into calculations…

1. Consumed Load = Total Load · Demand Factor: Consumed Load in KW = 80 · 1 = 80 KW.
2. Consumed Load in KVA = KW/P.F.: Consumed Load in KVA = 80/0.8 = 100 KVA.
3. Full Load Current = (KVA · 1000) / (1.732 · Voltage): Full Load Current = (100 · 1000) / (1.732 · 415) = 139 Amp.

## How do you calculate cable size for a kW motor?

The cable size is equal to the 1.5 times of the full load current of the motor/load. Hence the cable rating formula can be written as, Cable size = 1.5 x Full Load Current.

What is the cable size for 7.5 kW motor?

We installed 7.5 Kw Induction Motor. We used 10 mm 4 core cable for it.

How do I calculate electric cable size?

To calculate the Cable Sizing one needs to divide the voltage running through the cable by the target current. For instance, If your wire has a voltage current of 150 Volts and your target is 30 then you divide 150/30. This gives you your target resistance of 5 which is required.

### How is cable current rating calculated?

Cable Capacity

1. For Cu Wire Current Capacity (Up to 30 Sq.mm) = 6X Size of Wire in Sq.mm. Ex.
2. For Cable Current Capacity = 4X Size of Cable in Sq.mm, Ex. For 2.5 Sq.mm = 4×2.5 = 9 Amp.
3. Nomenclature for cable Rating = Uo/U.
4. where Uo = Phase-Ground Voltage, U = Phase-Phase Voltage, Um = Highest Permissible Voltage.

### Is 6mm cable OK for a 9.5 kW shower?

Electric Shower Power Ratings and Power Cable Information Showers up to 9kw may carry a 6mm cable as long as the shower unit is within 18 meters of the fuseboard. Fuses and switches should be rated at 40 amps. Showers up to 12.5kw should carry a 10mm cable to units within 35 metres of the fuseboard.

What size cable do I need for 3kw?

Two core and earth 2.5mm cable is used for the mains cable. A heat resistant 16amp cable or flex should run to the isolator switch from where the neon indicator light should light up.

What is the size of cable?

Cable Size & Current Rating Chart

Cross Section (mm2) Approximate Overall Diameter (mm) Current Rating
25 8.7 89
35 10.08 110
50 11.8 134
70 13.5 171

## What size wire do I need for a 5 hp motor?

Three Phase (230 Volt) – Wire Size Selection Guide*
HP Cable Length
5 14 10
7 1/2 14 10
10 14 8

## How many amps are in a kW?

4.55 Amps
One of the most frequently needed electricity conversions is kW (kilowatts) to Amps. kW is a unit of measure of electrical power (wattage)….kW To Amps Calculator: Convert Killowatts To Amps (+3 Examples)

Power (kW) Voltage (220 V) Amperage (A)
1 kW to Amps: 220 V 4.55 Amps
2 kW to Amps: 220 V 9.09 Amps

How much load can 1.5 mm wire take?

If the wire is a 1.5 mm flexible strand, it can carry a maximum load of 13 A.

What is the size of the current rating on the cable?

Cable Size & Current Rating Chart Cross Section (mm2) Approximate Overall Diameter (mm) Current Rating Current Rating 16 6.95 76 68 25 8.7 101 89 35 10.08 125 110 50 11.8 151 134

### What is the current rating of a single phase cable?

Cable Size & Current Rating Chart. Cross Section (mm2) Approximate Overall Diameter (mm) Current Rating. Single Phase (Amps) Three Phase (Amps) 1.5. 2.9. 17.5.

### How are cable size results calculated for international standard cable?

The cable size results for International standard cable are calculated from IEC 60364-5-52: Low Voltage Electrical Installations, selection and erection of electrical equipment – Wiring systems and are based on 230V and 415V voltage drop. In both BS and IEC calculations, the KW calculation is based on a power factor of 0.8.

How to choose the right cable size for Your Motor?

Look at the table of motor kW to cable size chart. The chart is prepared based on the direct online start and star-delta starting. Note that, using aluminium cable for low rating motor up to 1.5kW/2HP motor is not recommended. Here 2R indicates Two Run cables. The cable size chart is suitable for both single-phase and three-phase.

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