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Wire sizing is based on the amperage. The formula you need to find amperage from HP for single phase is
, I = HP x 746/E x %eff x pf. For three phase I = HP x 746/1.73 x E x %eff x pf.
A standard motor's efficiency between 5 to 100 HP is .84 to .91.
A standard motor's power factor between 10 to 100 HP is .86 to .92.
I = Amperage, E = Voltage.
When you have calculated the amperage ask a electrician to look up the wire size for that specific amperage. He should have a code book and there is a list of wire sizes and amperages. The quickest way of finding the amperage is by looking on the motor's nameplate. There you will find all of the information that you need.
What else can I help you with?
Which method of installing cables ensures the highest current rating for each cable size?
Cables spaced apart on cable ladder, shaded from sun
What is the cable size for 600V 3 phase ac motor?
you need the current of motor or the KW/HP rating
What size cable for a hob?
The size of the cable for an electric hob typically depends on the hob's power rating. For most domestic hobs that have a power rating between 3 kW to 7 kW, a 6 mm² cable is commonly recommended. Always ensure that the installation complies with local electrical regulations and consider consulting a qualified electrician for proper assessment and installation.
What is the correct cable size for the 550 KVAR capacitor bank?
Cable sizing is based on amperage of the load. The rating of the capacitor bank and the voltage at which it operated need to be stated to give an answer.
What is the cu cable size in 400a load?
A 0.15Cu cable has a rating of 382 amps summer and 476 amps winter. 0.2Cu allows 425/530 amps. That is for outdoor use in overhead lines.
Are you 380 volt panel what size cable use?
With out knowing the amperage rating of the panel, an answer can not be given.
Which method of installing cables ensures the highest current rating for each cable size?
Cables spaced apart on cable ladder, shaded from sun
What is the cable size for 600V 3 phase ac motor?
you need the current of motor or the KW/HP rating
What size cable for a hob?
The size of the cable for an electric hob typically depends on the hob's power rating. For most domestic hobs that have a power rating between 3 kW to 7 kW, a 6 mm² cable is commonly recommended. Always ensure that the installation complies with local electrical regulations and consider consulting a qualified electrician for proper assessment and installation.
What is the correct cable size for the 550 KVAR capacitor bank?
Cable sizing is based on amperage of the load. The rating of the capacitor bank and the voltage at which it operated need to be stated to give an answer.
How do you calculate a cable size for a certain load?
for DC load and if its copper wire the cross section of the conductor wire is generally calculated as 1/4 th of the current rating . Eg for a DC load of 16 amp the copper conductor with 4 mm square is selected.
What is the cu cable size in 400a load?
A 0.15Cu cable has a rating of 382 amps summer and 476 amps winter. 0.2Cu allows 425/530 amps. That is for outdoor use in overhead lines.
What size armoured copper cable needed for 75 kW motor?
Wire sizing is based on the motors full load amperage. The amperage can be calculated but a voltage has to be stated. I = W/E. Amps = Watts/Volts. Restate the question with a voltage and an answer can be given.
How do you figure your celsius rating for wire sizing?
The ambient insulation rating of wires and cables is imprinted on the wire and cables. The labels on the cables will tell you the wire size, number of conductors and temperature rating of the wires and cables. The higher the cable and wire temperature ratings the higher the amount of current that is allowed to be drawn by the wire and cable according to the electrical code book.
How do you calculate the cable size for a run of 30 meters?
to calculate the cable size of a run of 30 meters long you first will have to know the current of the appliance use the voltage drop formula V d = (mVxIxL)/1000 once the voltage drop is less than 2.5% of the nominal voltage, the cable should be upsize.
Do you can use two small size power cable together instaed of large size cables?
Using two small size power cables together instead of one large size cable is generally not advisable, as it may lead to uneven load distribution and potential overheating. Each cable has a specific current rating, and combining them can exceed their safe capacity. It's best to use a single appropriately sized cable to ensure safety and compliance with electrical standards. Always consult with a qualified electrician for specific applications.
What size cable for a cooker oven only max 2600watts?
For a cooker oven with a maximum of 2600 watts, a 2.5mm cable is recommended to handle the load safely. This size of cable is commonly used for appliances with this power rating and will ensure that the electrical supply is properly distributed without overheating the cable. Be sure to consult a qualified electrician for installation to ensure safety and compliance with wiring regulations.
