# What is kVA motor code?

## What is kVA motor code?

For motors less than ½ horsepower, the code letter on the nameplate represents the locked-rotor kVA. On larger motors, it identifies the locked-rotor kVA per horsepower.

## What does kVA code mean?

A letter code defines the locked rotor current kVA on a per horsepower basis. The letter code consists of letters from A to V. The farther away from the letter code A, the higher the inrush current per horsepower.

What is a code letter on a motor?

Indicating locked rotor code letters for electrical motors NEMA – The National Electrical Manufacturer’s Association – who sets the design standards for motors, has established a NEMA Code letter designation to classify motors by the ratio of locked rotor KVA per horsepower.

How is kVA code calculated?

The National Electrical Manufacturer’s Association (NEMA) has designated code letters to classify motors by the rotor kVA per horse power….Locked rotor KVA per Horsepower.

Letter designation (KVA/HP) Minimum (KVA/HP) Maximum
A 1 3.14
B 3.15 3.54
C 3.55 3.99
D 4 4.49

### What are motor codes?

Motor Codes is a government backed body set up by the Society of Motor Manufacturers and Traders (SMMT) and approved by the Chartered Trading Standards Institute. It is also approved to act as an Alternative Dispute Resolution body.

### How do I know if my rotor is locked?

To find LRA and starting kVA enter nominal operation voltage (such as 120 or 240), HP value, code letter from the nameplate label, and hit “Calculate” button. The general equation for single-phase devices is the following: LRA=1000*(kVA/HP)/Voltage. Note that this defines starting current at full nominal voltage.

How do you calculate kVA lock rotor?

How is a design letter different from a code letter on a motor?

You use the DESIGN letter to select the proper motor for your task based upon the torque speed curve. You then use the CODE letter in determining the electrical capacity and protection of the circuit.

#### How many kVA is 1 HP?

How many Hp are: Equivalence in kVA:
1 Hp Equivalent to 0.997 kVA
2 Hp 1,995 kVA
3 Hp 2,992 kVA
4 Hp 3,989 kVA