Commercial refrigeration systems require precise electrical planning, clean execution, and strict code compliance. In this project, Smiley Electric partnered with TRS Cooling & Heating to complete a full electrical installation for a walk-in freezer, including power distribution, lighting, disconnects, and a service outlet.
This vlog documents the project from initial walkthrough to final startup — offering a real look at how commercial electrical work is done correctly.
Project Overview
When we arrived onsite, the previous installation had been partially disconnected but left unfinished. Wiring, loads, and controls were still in place, but no longer terminated at proper junction points.
The client requested:
- A clean, organized layout similar to the original design
- Electrical routing that followed existing line sets
- A safe, serviceable installation that would pass inspection
Power Distribution & Three-Phase Setup
This walk-in freezer required a three-phase electrical connection, which adds complexity and demands accuracy.
Our scope included:
- Bringing power from the panel into a new junction box
- Routing conduit below refrigerant line sets
- Stubbing up and turning conduit to reach the condenser unit
- Landing conductors into a new three-phase disconnect using a jack-knife style termination
The old disconnect was replaced due to improper internal cover protection — ensuring full code compliance and technician safety.
- Bringing power from the panel into a new junction box
Interior Lighting & Low-Voltage Coordination
Midway through the project, the client requested additional interior lighting for the freezer.
To complete this:
- We ran MC cable from the panel
- Landed power into an existing splice box
- Installed a dedicated junction box for the lights
- Ensured proper separation between low-voltage and line-voltage wiring
Even without bulbs installed yet, indicator lights confirmed the system was operating correctly.
Service Outlet Installation
A 120-volt service receptacle was added to support maintenance and service work.
Key details:
- Installed in the contractor’s requested location
- Fed from a dedicated breaker
- Weather-rated fittings used where required
- Fully tested and verified
This small addition greatly improves long-term serviceability.
Conduit Routing & Weatherproofing
Throughout the installation:
- EMT and MC were neatly routed and strapped
- Conduit paths followed existing infrastructure for a clean look
- Outdoor fittings were upgraded to weather-rated connectors
- Multiple conduits were used to keep loads organized
Attention to these details ensures durability in commercial environments.
Final Walkthrough & System Startup
At final walkthrough:
- All junction boxes were closed and secured
- Power was verified at the disconnect and service outlet
- Fans and refrigeration components powered on
- Voltage checks confirmed proper operation
The unit was briefly energized for testing, then shut down per HVAC request due to limited refrigerant at that stage.
A total of three breakers were installed:
- One for the condenser unit
- One for interior lighting
- One for the service outlet
Why Proper Electrical Work Matters for Commercial Refrigeration
Walk-in freezers rely on:
- Stable power
- Correct phasing
- Reliable disconnects
- Clean wiring practices
Mistakes can lead to equipment damage, downtime, or failed inspections. That’s why experienced commercial electricians are critical for these systems.
Commercial Electrical Contractors for Refrigeration Projects
Smiley Electric specializes in:
- Walk-in freezer and cooler electrical installs
- Three-phase power systems
- Commercial lighting and service outlets
- HVAC and refrigeration electrical coordination
We proudly serve Portland, Beaverton, Hillsboro, and the surrounding metro area.
👉 Contact Smiley Electric today for commercial electrical installation or troubleshooting services.