0
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.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
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 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.
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.
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 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.
Are there any categories for tsunamis' size?
No. There is no rating system for tsunamis as there is for other natural disasters. Heights are simply given in feet or meters.
What cable size is required to carry 385amps?
can use 400mm THW,RHW,RUH (rating: 400mm = 388amperes)
What is the type and size of cable gland or 2 core cable?
To answer this question the size of the cable or the amperage of the load is needed to calculate the correct wire size and connectors to fit the cable.
How do you calculate the requirement of cable size for a given load?
If you know the size of the load to be served, multiply it by 125% ( times 1.25) and choose a conductor that is rated for that ampacity or higher.
