Three-Phase Motor Wiring & Repair in Oshawa

How Three-Phase Motor Wiring & Repair Works

1. 1

   Motor & load assessment

   We check the motor’s nameplate rating, duty cycle, and existing wiring or control circuit to scope the installation or repair.

2. 2

   Circuit & protection sizing

   We size the disconnect, starter, and overload protection to the motor’s actual full-load amps, not a generic setting.

3. 3

   Wiring & control installation

   We install or repair the motor circuit and control wiring, checking phase balance and connections at the motor terminal box.

4. 4

   Testing & documentation

   We test the motor under load, confirm phase balance and correct rotation, and provide ESA inspection documentation where required.

Frequently Asked Questions

Why does my three-phase motor hum but not start?

This is often a sign of single-phasing, missing one of the three phases, or a failed starter or contactor. We check phase presence and balance and trace the fault to its actual source.

Why does my motor keep tripping its overload?

An overload set incorrectly for the motor’s actual full-load amps, a phase imbalance, or a motor drawing more current than it should due to a mechanical issue are the most common causes. We test and correctly size the overload protection.

Do you install new motor circuits or only repair existing ones?

Both. We install new three-phase motor circuits, starters, and disconnects for new equipment, and repair or troubleshoot existing motor circuits that are faulting.

Can you replace a motor starter or overload relay?

Yes, we replace motor starters, contactors, and overload relays, sized to your specific motor’s nameplate rating rather than a generic replacement.

Do you work on motors for pumps, compressors, and conveyors?

Yes, we wire and repair three-phase motor circuits for pumps, compressors, conveyors, fans, and machine tools across manufacturing, industrial, and commercial properties.

How much does three-phase motor wiring or repair cost?

Cost depends on the motor’s horsepower and voltage, whether it’s new wiring or a repair, and whether the starter or disconnect need replacing. We provide a clear quote after assessing the motor and existing circuit.