Quick Answer: A reefer container in Ontario needs 3-phase 460V power on a 32-amp circuit, drawing 5.8 to 11 kW depending on size and ambient temperature. Rural sites without 3-phase utility service add a rotary phase converter sized 15 to 20 hp to run the IEC 60309 plug from single-phase 240V residential or farm power. Van Blanc has shipped containers across Ontario since 1995, with honest 4.9-star service and 1 to 3 day delivery from 4 Brantford yards.
In This Guide
- Why Do Reefer Containers Run on 3-Phase 460V Power?
- How Many Amps Does a Reefer Container Draw on an Ontario Site?
- What Is the IEC 60309 Reefer Plug?
- Can You Run a Reefer on a Single-Phase Ontario Property?
- What Size Rotary Phase Converter Does a Reefer Need?
- Do You Need a Transformer for 600V Service?
- How Do You Prep the Site Before the Reefer Lands?
- What Does a Hydro One 3-Phase Upgrade Involve?
- How Much Does It Cost to Run a Reefer Each Month in Ontario?
- Do You Need ESA-Certified Electrical for a Reefer Hookup?
- Frequently Asked Questions
Reading time: about 14 minutes.
Why Do Reefer Containers Run on 3-Phase 460V Power?
A reefer container runs on 3-phase 460V power because its refrigeration compressor is a heavy motor load. Across three phases at 60 Hz, the compressor stays cool, starts cleanly, and draws less running current than a single-phase motor of the same horsepower. That is the standard every container ship, terminal rack, and intermodal yard runs worldwide.
Every standard ocean-going reefer container ships with a 3-phase 460-volt refrigeration unit because that is what container ships, terminal racks, and intermodal facilities run worldwide. The compressor is a heavy motor load, and 3-phase power keeps it efficient under the steady 24-hour duty cycle that holds a 40-foot box at -20°C through a Brantford August. Single-phase motors at the same horsepower run hotter, draw more starting current, and wear out faster. The container engineers built the system for the dock, and the dock runs on 3-phase. Paul LeBlanc, who founded Van Blanc in 1995 and has 19 years in the container trade, puts it plainly: “The reefer was born on the dock. The day it lands on a farm, the power question is the whole job, and we have the hydro conversation before the truck is ever booked.”
That choice is great when your bin lives in a port. It becomes a problem the moment the same bin lands on a Norfolk County cannabis farm, a Tillsonburg greenhouse, or a contractor’s yard in rural Brant. Most rural and many semi-urban Ontario properties have single-phase utility service. The pole at the road carries one hot, one neutral, and a ground. The reefer plug expects three hots, a neutral, and a ground. The two services do not speak the same language without help.
If you are still weighing whether a reefer suits your operation at all, our wider walkthrough of how Ontario buyers choose and use refrigerated units by industry sets the context, and this page gets specific about the power that feeds them. Planning the electrical side early is what turns a reefer purchase into a working cold room instead of a parked steel box.
Reefer Power, Plain English
A 20-foot reefer draws roughly 5.8 to 7.5 kW running, with a brief inrush spike on startup of 2-3x running current. A 40-foot high-cube reefer draws 9 to 11 kW running, with startup spikes up to 50-60 amps for a few seconds. Both expect 460V across three phases, 60 Hz, with a dedicated 32-amp circuit breaker per the Cascade Container and ATS Containers spec sheets that ship with most North American reefers.
How Many Amps Does a Reefer Container Draw on an Ontario Site?
A reefer container’s real amp draw on an Ontario site depends on the season and the setpoint, not just the nameplate. Spec sheets give nameplate numbers; real sites tell you what the bin actually pulls on a Tuesday afternoon in July. Christian has watched the running amps on enough Ontario installs to know the pattern: a 40-foot reefer holding +4°C on a 30°C ambient day will pull 14-18 amps per phase steady, climbing into the low 20s while it runs through a defrost cycle to clear coil frost. The same bin in February holding -18°C against a -25°C outdoor ambient drops to single-digit amps on the running side because the differential is small and the compressor barely works.
Cold storage at very low setpoints (-25°C to -30°C for frozen meat, bakery, or pharma) keeps the compressor running closer to the high end. Niagara winery operators using reefers as bottling-cycle cold rooms (+12°C to +14°C) sit on the low end. Cannabis curing rooms at +18°C with humidity control pull more than the temperature alone would suggest because the humidification compressor is a separate load.
The takeaway: design the circuit for the nameplate (32 amps), not for what you measure on a mild day. Voltage drop across a long run from your service panel to where the bin sits will eat into available capacity. A 30-metre run from a barn-mounted panel to a reefer at the back of the lot needs heavier conductor than the 32-amp number alone implies, especially in winter when copper resistance climbs slightly.
What Is the IEC 60309 Reefer Plug?
The IEC 60309 reefer plug is the international standard pin-and-sleeve connector that powers a refrigerated container. Every reefer container we deliver shows up with the same plug at the end of the 18-metre cable: an IEC 60309-2 connector, 32 amps, 440-460 volts, 50/60 Hz, three pole plus earth (3P+E), with the ground pin at the 3 o’clock position. The body is typically red. The pin pattern is keyed so the plug cannot be inserted upside-down or into a lower-voltage receptacle. It is the same plug used on container ships, at intermodal terminals, and at every legitimate reefer storage yard in Ontario.
The matching receptacle on your end of the wiring is what most rural and small-commercial buyers do not have. A licensed Ontario electrician can install the IEC 60309 32-amp 460V female socket on a weatherproof box at the foot of the bin. The box gets fed from a 32-amp 3-pole circuit breaker in your panel through suitably-sized conductor (typically #8 AWG copper for short runs, #6 or larger for runs over 20 metres). Conduit, bonding, and the disconnect switch all need to meet the Ontario Electrical Safety Code.
What the Plug Looks Like at the Yard
When you visit our Brantford yard to view a reefer before buying, the cable and plug are coiled at the back-right corner of the container, secured against the rear corner casting. The plug body is heavy red plastic with a metal ring and five pins inside. If you have never wired one, take a photo with your phone and show it to your electrician at the planning meeting. It is a standardized fitting they will recognize on sight.
Can You Run a Reefer on a Single-Phase Ontario Property?
You can run a reefer on a single-phase Ontario property, but only after the single-phase supply is converted to 3-phase at the load. Hydro One delivers single-phase 240V to the average farm, cottage, and rural acreage. Three-phase service exists in industrial parks, urban commercial corridors, and along main rural feeders where a previous industrial customer paid for the transformer upgrade. Outside those zones, getting 3-phase to your property means either (a) paying Hydro One to extend or upgrade the service, or (b) converting single-phase to 3-phase at the load.
Christian, Paul’s son and the second-generation operator at Van Blanc, walks more buyers through this conversation than any other reefer-related question. “Most calls start with the customer asking what bin they want,” he says. “When they tell me it is a reefer for a farm at the back end of a concession road, my first question is what their hydro service looks like, because that determines whether we are talking about a 30-day install or a 90-day one.”
The 90-day route is Hydro One service upgrade. The 30-day route is a phase converter sized for the reefer load and installed by a licensed electrician on a small concrete pad next to where the bin will sit. Both options work. The phase-converter route bundles the converter equipment with the electrician’s labour, and the total scales with the converter’s horsepower rating and the length of the conduit run. The utility upgrade route is driven almost entirely by distance from the nearest 3-phase feeder and how much line extension Hydro One has to build, so a property next to an existing feeder pays a fraction of what a deep-rural acreage does.
What Size Rotary Phase Converter Does a Reefer Need?
A rotary phase converter for a reefer should be rated for 1.5 to 2 times the unit’s running horsepower so it can swallow the compressor’s startup inrush. The rotary phase converter is the dominant choice in Ontario farm and small-commercial use for converting single-phase to 3-phase on a reefer load. Static converters do not handle the inrush of a refrigeration compressor reliably. Digital converters work but cost roughly double for the same hp rating. Rotary converters use a spinning idler motor to generate the third phase, deliver ±2-5% voltage balance under load, and start hard motor loads without dropping the line.
Sizing rule of thumb: pick a rotary converter rated for 1.5 to 2 times the reefer’s running horsepower to handle the inrush spike on compressor startup. A typical 40-foot reefer at 10 kW running uses roughly 13-15 hp under load. A 20 hp rotary converter is a comfortable match. A 15 hp converter will work but runs closer to its limit during defrost cycles when the bin is also energizing electric heater elements.
| Reefer Size and Setpoint | Running Load (kW) | Suggested Rotary Converter (hp) | Sizing Headroom Over Running Load |
|---|---|---|---|
| 20 ft, refrigerated (+4°C) | 5.8-7.5 | 10-15 hp | ~1.5-2.0x for inrush |
| 20 ft, frozen (-20°C) | 6.5-8.5 | 15 hp | ~1.5x, runs near limit on defrost |
| 40 ft HC, refrigerated (+4°C) | 8.5-10 | 15-20 hp | ~1.5-1.8x for inrush |
| 40 ft HC, frozen (-20°C) | 9.5-11 | 20 hp | ~1.8-2.0x for inrush |
| Two reefers on one converter | combined load | 30-40 hp | size to combined inrush, not just sum |
Converter sizing here reflects 2026 Ontario distributor specs from North America Phase Converters, Phoenix Phase Converters, and Larson Electronics product lines. The equipment side scales with the horsepower rating you choose, while the installation side scales with conduit run length and concrete pad work. Most Ontario electricians familiar with farm and small-commercial 3-phase loads handle the install in a single day once the equipment is on site. The same yard crew that builds out venting, lockboxes, and the rest of our at-the-yard reefer build-outs and electrical rough-in can scope the receptacle and disconnect with you before delivery, so your electrician walks onto a site that is ready to wire.
Do You Need a Transformer for 600V Service?
You need a step-down transformer if your site has 600V 3-phase service, because a reefer expects 460V and 600V will destroy it. Some Ontario commercial sites have 600V 3-phase service, not 460V. Older industrial parks, manufacturing buildings, and farms with historic 3-phase upgrades sometimes run 600V because Canadian utilities standardized on that voltage class for industrial distribution. The reefer expects 460V. Connecting a 460V reefer to a 600V supply without a step-down transformer destroys the refrigeration unit within hours.
A small dry-type 600V-to-460V step-down transformer rated 15-25 kVA handles a single reefer, with the kVA rating you need driven by how many bins the transformer feeds. The transformer needs a dedicated disconnect, primary and secondary overcurrent protection, and bonding per the Ontario Electrical Safety Code. Larger sites running multiple reefers benefit from a single larger transformer feeding a sub-panel with multiple reefer circuits, which often costs less per bin than individual transformers.
The reverse problem (240V single-phase service stepped UP to 460V 3-phase) is what the rotary phase converter solves directly. Some installers add a small buck-boost transformer downstream of the converter if the output voltage runs slightly below 460V due to long conductor runs or undersized utility service. Voltage at the reefer plug should sit at 440-480V under load. Below 420V you risk compressor damage. Above 500V the protection circuits trip.
How Do You Prep the Site Before the Reefer Lands?
You prep a reefer site by settling the power feed first, then the pad, then the receptacle and disconnect, all before the container lands. Christian’s planning checklist with every Ontario reefer buyer covers the power conversation before scheduling delivery. The bin is heavy, the cable is short (18 metres from the plug to the unit), and the disconnect switch needs to be within sight of the unit per code. Plan the site so the receptacle box ends up within roughly 10 metres of where the reefer will land. Pulling cable across a yard after the bin is on the ground always costs more than running conduit before.
Reefer Power Site Prep, in Order
- Confirm utility service. Single-phase 240V or 3-phase 460V or 600V. Your hydro bill or a quick call to Hydro One tells you what you have.
- Pick the bin location. Doors face the access aisle. The refrigeration-unit end (where the plug lives) faces the power feed.
- Build the pad. Concrete or compacted gravel, level, with 6 inches of clearance under the rear corner castings for airflow into the refrigeration unit.
- Run the conduit. Underground PVC or aboveground EMT to a weatherproof junction box at the planned bin location.
- Install the IEC 60309 receptacle. Mounted on a service pole, post, or building wall within 10 metres of where the cable end will sit.
- Install the disconnect switch. Lockable, within sight of the reefer per the Ontario Electrical Safety Code.
- If applicable, install the phase converter. Concrete pad, weather enclosure, separate disconnect on the single-phase input side.
- ESA inspection. Required before energizing.
The order matters because the ESA inspector wants to see the finished wiring before the load is connected. Rushing this step to “save time” delays the actual delivery because we cannot leave a reefer on a site that is not legally ready to energize it. A real 1-3 day delivery from our Brantford yards depends on the buyer having the receptacle wired and inspected before we schedule the truck.
What Does a Hydro One 3-Phase Upgrade Involve?
A Hydro One 3-phase upgrade involves the utility surveying your service, then swapping the transformer or extending the line to bring three phases to your meter, with cost driven by distance to the nearest feeder. It is the alternative when a rotary converter does not fit your site or your load (multiple reefers, year-round operation, larger compressors). The application starts at hydroone.com under the Customer Connections section. The utility surveys your existing service, the distance to the nearest 3-phase feeder on the road allowance, and any transformer or line work required to bring 3-phase to your meter.
What drives the cost on Ontario installations completed in 2024-2026:
| Hydro One Upgrade Scenario | Main Cost Driver | Timeline |
|---|---|---|
| 3-phase feeder already at property line, transformer swap only | Transformer and metering only, lowest cost | 4-8 weeks |
| 3-phase feeder within 100 metres, modest line extension | Short line build adds poles and conductor | 8-14 weeks |
| Line extension 200-500 metres along road allowance | Cost rises with each span of new line | 14-26 weeks |
| Longer extension or land easement required | Easement and long line build, highest cost | 6-12 months |
For buyers with two or more reefers, a long-term operation, or future expansion plans, the utility upgrade usually pencils out within five years because phase converters draw extra power as conversion overhead (roughly 5-10% loss) and require occasional bearing service on the idler motor. For a single bin holding seasonal product, the rotary converter is the cheaper, faster path. Christian helps buyers run the numbers honestly so they pick the right option, not the more expensive one.
How Much Does It Cost to Run a Reefer Each Month in Ontario?
The monthly cost to run a reefer in Ontario depends on the setpoint, the product, and the time of day you pull load, and it climbs as the temperature differential grows. Once the reefer is energized, the operating cost tracks what you are storing, what temperature you are holding, and when you draw power. Ontario electricity pricing as of 2026 swings with the clock: time-of-use rates are cheapest off-peak overnight and most expensive on-peak during weekday daytime hours, with mid-peak in between, so a reefer that does most of its compressor work overnight bills lower than one fighting daytime heat. Published Ontario Energy Board electricity rates set the per-kWh bands and update twice a year. Commercial demand-class customers can land lower on the energy rate but pay a separate demand charge tied to their peak kW draw in the month, so cannabis and food-processing operators who flatten their peaks come out ahead.
Real monthly examples we have seen on Ontario reefer installs:
| Use Case | Setpoint | Avg Monthly kWh | Relative Energy Demand |
|---|---|---|---|
| Niagara winery bottling-cycle buffer | +12°C | 1,200-1,800 | Lowest, small temperature differential |
| 20 ft farm produce storage | +4°C | 1,800-2,800 | Low to moderate |
| 40 ft greenhouse curing room | +18°C with humidity | 2,500-3,800 | Moderate, humidity adds a separate load |
| 40 ft frozen meat or bakery | -20°C | 3,800-6,200 | High, large differential year-round |
| Pharma low-temp storage | -30°C | 5,500-8,500 | Highest, deepest setpoint |
Phase-converter operation adds roughly 5-10% to those numbers due to conversion overhead. Sites with poor power factor (older transformers, undersized service) lose more. We walk through a quick site-electrical assessment with every buyer so they know the monthly operating cost before the bin is delivered. Honest numbers prevent the call-back three months later asking why the hydro bill jumped.
Do You Need ESA-Certified Electrical for a Reefer Hookup?
Yes, a reefer hookup in Ontario needs an Electrical Safety Authority (ESA) connection inspection before the unit is energized. Every reefer install requires it, and it is not optional. ESA permits are filed by the licensed electrician doing the work, the inspector visits the site once the wiring is complete, and the certificate is what tells your hydro provider it is safe to energize. Operating a reefer without an ESA inspection exposes the operator to insurance void in case of fire, electrical injury liability, and potentially Ontario Electrical Safety Code charges.
For Ontario buyers running reefers as part of a commercial operation (cannabis production, food processing, pharma storage), the ESA certificate is also typically required by your insurance underwriter and any third-party certifications you hold (GMP, HACCP, Health Canada cannabis licensing). The electrician you hire should be familiar with 3-phase 460V industrial installations, not just residential service work. Ask if they have wired an IEC 60309 32A reefer plug before. Good reefer-power planning always starts with that one conversation.
Christian LeBlanc, second-generation operator: “The buyers who get reefer installs right are the ones who call us before they buy, not after. We have been delivering reefers across Ontario for 19 years on the container side and 30 years as a company. We know which conversations save people money and which ones save them from a frozen hydro bill. The bin is the easy part. The power is the part where the planning pays back.”
Frequently Asked Questions
What voltage does a reefer container need in Ontario?
Standard ocean-going reefers expect 3-phase 460V at 60 Hz with a 32-amp circuit. Some older units accept 380V or 400V (European 50 Hz spec). Ontario commercial sites sometimes have 600V service that needs a step-down transformer to 460V before the reefer plug. Single-phase 240V residential service needs a rotary phase converter sized for the load.
Can I run a reefer on single-phase power?
A 3-phase reefer cannot run directly on single-phase. You need either a rotary phase converter to generate the third phase from your 240V single-phase service, or a single-phase-native reefer (some models exist at 230V but inventory is limited). Budget for the converter equipment plus a licensed electrician’s install. The converter route is faster than waiting for a Hydro One 3-phase upgrade.
How much amperage does a 40-foot reefer draw?
Nameplate is 32 amps on the 460V circuit. Real running load in Ontario summer ambient holding +4°C is 14-18 amps per phase. Frozen storage at -20°C runs higher (20-28 amps per phase). Startup inrush spikes briefly to 50-60 amps. Design the circuit and converter sizing to the 32-amp nameplate plus startup inrush, not the lower running average.
What is the IEC 60309 plug on a reefer?
The IEC 60309-2 plug is the international standard reefer connector. Red body, 32 amps, 440-460V, 3-phase plus ground, with the earth pin at 3 o’clock. Every reefer container we deliver comes with this plug at the end of an 18-metre cable. The matching weatherproof receptacle gets installed at your site by a licensed Ontario electrician on a 32-amp 3-pole breaker.
How much does a Hydro One 3-phase upgrade cost in Ontario?
Cost depends almost entirely on distance to the nearest 3-phase feeder. A transformer swap when the feeder is already at the property line is the cheapest case, a modest line extension under 100 metres costs more, and longer extensions of 200 to 500 metres along the road allowance cost the most because every span of new line adds poles and conductor. Timelines range 4 weeks to 12 months. The application starts on the Hydro One Customer Connections page.
Is a rotary phase converter or utility upgrade better for one reefer?
For a single bin holding seasonal product, the rotary converter is cheaper and faster, covering the converter equipment plus the electrician’s install and ready in 3-4 weeks. For multiple reefers or a long-term operation, the Hydro One upgrade usually pays back within five years because phase converters add 5-10% conversion overhead and need occasional service.
Do I need an ESA inspection for a reefer hookup?
Yes. Every Ontario electrical install needs an Electrical Safety Authority connection inspection before energizing. The licensed electrician files the permit, the inspector visits once wiring is complete, and the certificate clears the hydro provider to energize. Skipping ESA voids your insurance and exposes you to Ontario Electrical Safety Code charges.
What size rotary phase converter do I need?
For a 20-foot reefer holding +4°C, a 10-15 hp rotary converter works. For a 20-foot frozen reefer, step up to 15 hp. For a 40-foot HC refrigerated, use 15-20 hp. For a 40-foot HC frozen, use 20 hp. Two reefers on one converter need 30-40 hp combined. Always size to 1.5-2x running horsepower to handle compressor inrush.
Can my farm wire a reefer hookup myself?
Ontario regulation requires a licensed electrician to install any 3-phase 460V circuit and file the ESA permit. Owner-installed wiring on this voltage class is not legal and not insurable. The licensed electrician’s labour for a full reefer hookup, including the disconnect, receptacle, and ESA permit, varies with conduit length and pad work.
How much does it cost to run a reefer monthly in Ontario?
It depends on setpoint and use, and the monthly bill climbs as the temperature differential grows. A winery bottling-cycle buffer at +12°C draws the least, farm produce storage at +4°C a little more, and a greenhouse curing room at +18°C with humidity adds a separate humidification load. Frozen storage at -20°C runs high year-round, and pharma low-temp at -30°C is the heaviest draw of all. Phase-converter sites add 5-10% conversion overhead on top.
Sources
- Cascade Container. (2025). Refrigerated Container Electrical Requirements. cascadecontainer.com
- ATS Containers. (2024). Reefer Electrical Guide. atscontainers.com
- International Electrotechnical Commission. (2021). IEC 60309-2: Plugs, socket-outlets and couplers for industrial purposes. iec60309.com
- North America Phase Converters. (2025). Calculating Single-Phase Converter Power Requirements for Three-Phase Motors. northamericaphaseconverters.com
- Electrical Safety Authority. (2025). Connection Authorization and Inspection Requirements, Ontario. esasafe.com
Reach Van Blanc in Brantford
We have been supplying shipping containers across Ontario since 1995. Our warehouse is at 90 Morton Avenue East in Brantford, and we deliver right across the province in 1-3 days from our 4 Brantford yards. Real lead times, not hopeful ones.
Van Blanc Ent. Inc. 90 Morton Ave E Unit 1B, Brantford, ON N3R 7J7 +1 888-509-6658
Planning a reefer install on a single-phase Ontario property? Call Christian or Paul before you buy the bin. You can browse the reefer sizes we keep on the lot first, but the right starting point is a 10-minute conversation about your hydro service, your load, and your timeline. If you are weighing temperature ranges and running costs, our full guide to insulated reefers in Ontario covers the rest. The bin is the easy part.
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