Electrical Socket Types Explained

Electrical Socket Types: Key Insights

• Canada uses the same Type A and Type B sockets as the United States, which is why most American-made appliances plug in without an adapter.
• The international letter system for plugs, running from A to O, was created to classify shapes and pin counts. It says nothing about how safe or modern a given standard is.
• A standard outlet replacement in Canada typically costs $150 to $400, while a dedicated 240-volt outlet for a stove, dryer or EV charger runs $250 to $800 because it needs its own circuit back to the panel.
• Outlets that look identical on the cover plate can be wired very differently behind the wall, which is part of why a quick swap sometimes uncovers a bigger problem.
• Tamper-resistant and GFCI outlets are required by Canadian electrical code in specific rooms, not as an optional upgrade, so budgeting for them ahead of a renovation avoids surprises.

In this guide, you'll read about:

1. Electrical Socket Types: An Overview
2. Mains Plug Types Around the World
3. Electrical Outlet Types Used in Canadian Homes
4. How to Replace an Electrical Outlet: Step by Step
5. Tools and Materials Needed for an Outlet Replacement
6. When to DIY and When to Call a Pro
7. Find an Electrician on HomeStars
8. Frequently Asked Questions

Electrical Socket Types: An Overview

When people search for electrical socket types, they're usually asking one of two different questions: what's actually installed in their own walls, or what they're looking at on a trip or an imported appliance. Canada answers these with two separate systems, and mixing them up is where most of the confusion starts.

Canadian electricians don't describe outlets using the international letter system at all. Instead, they classify by function and amperage, such as standard, GFCI, 20A or 240V, and that functional system is what determines cost, code compliance and installation requirements for any work done in your home. It's covered in the next two sections.

Where the letter system matters directly to homeowners is travel and imported appliances. Canada shares the same Type A and Type B standard as the US at 120 volts, which is why most American-bought electronics need no adapter here.

Mains Plug Types Around the World

There is no single global standard. Each region built out its electrical grid independently, long before international travel made compatibility a priority, and 15 plug types are still in everyday use today. They are labelled A through O, a system created later by the US International Trade Administration purely for cataloguing. The letter tells you the shape, not the safety or the generation.

Type	Description	Mainly used in
A	Two flat pins, no ground	North and Central America, Japan
B	Two flat pins plus a round ground pin	Canada, the US, Mexico, Japan
C	Two round pins, no ground (Europlug)	Most of continental Europe, parts of Asia, Africa and South America
D	Three large round pins	India, Sri Lanka, Nepal
E	Two round pins with a socket-side ground pin	France, Belgium, Poland and others
F	Two round pins with side ground clips (Schuko)	Germany, Austria, the Netherlands, Spain
G	Three rectangular pins, built-in fuse	UK, Ireland, Malaysia, Singapore, Hong Kong
H	Two angled flat pins plus a ground pin	Israel
I	Two angled flat pins, often plus a ground pin	Australia, New Zealand, China, Argentina
J	Two round pins plus a ground pin	Switzerland, Liechtenstein
K	Two round pins with a separate ground pin	Denmark, Greenland
L	Three round pins in a row	Italy
M	Three large round pins	South Africa, Swaziland, Lesotho
N	Two round pins plus a ground pin	Brazil, South Africa
O	Three round pins	Thailand

Of these, four come up most often in searches because they cover the bulk of Canadians' actual travel and shopping destinations:

Type B Electrical Socket

The standard grounded outlet across Canada, the US, Mexico and Japan: two flat pins plus a round ground pin, rated 15 amps at 120 volts. If your home was wired any time in the last several decades, this is what's behind your cover plates.

Type C Electrical Socket

The ungrounded "Europlug" used throughout most of continental Europe. Two round pins, capped at 2.5 amps, so it's limited to small electronics. It's being phased out at the socket level in favour of grounded standards, though the plug itself still fits into them.

Type F Electrical Socket

The German "Schuko" standard, also used in Austria, the Netherlands and Spain. Similar shape to Type C but grounded via side clips instead of a separate pin, rated 16 amps.

Type G Electrical Socket

The UK standard, also used in Ireland, Malaysia and Singapore. Three rectangular pins in a triangle, rated 13 amps, with a fuse built into the plug itself, a feature most other types skip.

Electrical Outlet Types Used in Canadian Homes

While the international letter system explains the physical shape of a plug, Canadian electricians describe outlets by their function and amperage. Knowing the difference helps when you are talking to a pro about a renovation or a repair.

Outlet Type	What It's For
Standard 15A duplex	General-purpose outlets in living rooms, bedrooms and hallways
20A outlet	Kitchen counters and dedicated circuits for higher-draw small appliances
GFCI outlet	Required near water sources: kitchens, bathrooms, garages and outdoor outlets
AFCI-protected circuit	Required in most living spaces under current code to reduce fire risk from arcing
240V outlet (dryer, range, EV charger)	Dedicated circuits for major appliances and EV charging stations
Tamper-resistant outlet	Required in all new residential construction to reduce the risk of shock to children

A 20-amp outlet can be identified by a small T-shaped slot alongside the standard vertical slot, which allows a 20-amp plug to draw the full rated current. Most household plugs, including those on lamps and small electronics, are still 15-amp and will work fine in either outlet type.

For a breakdown of what it costs to update outlets and wiring across these categories, see our cost to replace plugs and wires guide.

How to Replace an Electrical Outlet: Step by Step

A straightforward like-for-like outlet swap, such as replacing a worn 15-amp duplex outlet with a new one of the same type, generally follows the same sequence:

• Shut off power: find the correct breaker in the panel and confirm it is off using a voltage tester at the outlet, not just by the breaker label.
• Remove the cover plate: unscrew and set aside the plate and the mounting screws holding the outlet in the box.
• Disconnect the wires: note which wire was connected to which terminal before removing them, or take a photo for reference.
• Connect the new outlet: match the black wire to the brass terminal, the white wire to the silver terminal and the bare or green wire to the ground terminal.
• Secure and test: screw the outlet back into the box, replace the cover plate, then restore power and test with a plug-in outlet tester.

This sequence assumes the existing wiring is in good condition and properly grounded. If the box has no ground wire, shows signs of damage, or the wiring looks different from what is described above, that is a sign to stop and call a pro rather than improvise.

Tools and Materials Needed for an Outlet Replacement

A basic outlet swap does not require a large toolkit, but a few items make the job safer and easier:

• Voltage tester: confirms the circuit is actually de-energized before you touch any wires.
• Screwdrivers: both flathead and Phillips, since outlet and cover plate screws vary.
• Wire strippers: needed if any wire ends are damaged or need to be trimmed back.
• Replacement outlet: matched to the correct amperage and type, such as standard, GFCI or tamper-resistant.
• Plug-in outlet tester: a low-cost tool that confirms correct wiring and grounding once the job is done.

Find a pro to handle your outlet replacement

When to DIY and When to Call a Pro

Replacing a single outlet with one of the same type, on a circuit you understand, is a job some homeowners are comfortable doing themselves. Several situations call for a pro instead:

• No ground wire is present: older homes wired before grounding was standard cannot simply have a grounded outlet added without further work.
• The wiring is aluminum or knob and tube: both require specific techniques and connectors, and improper handling is a fire risk.
• You are installing a GFCI or AFCI outlet for the first time: these need to be wired and tested correctly to actually provide protection.
• You are adding a 240-volt outlet: this involves running a dedicated circuit back to the panel, which falls under permit requirements in most provinces.
• Multiple outlets on a circuit are warm, flickering or tripping breakers: this points to a wiring issue beyond the outlet itself.

In most Canadian provinces, electrical work beyond simple like-for-like fixture swaps requires a permit and must be performed or inspected by a licensed electrician to meet code and remain insurable.

Find an Electrician on HomeStars

Outlet work looks simple from the cover plate, but what is happening behind the wall is not always obvious until someone opens it up. A pro who handles electrical sockets and switches regularly can spot a grounding issue, an overloaded circuit or outdated wiring before it becomes a bigger problem, and confirm the work meets code in your province. HomeStars connects you with pros who take on this kind of work, so you can read reviews from other homeowners, compare a few options and choose who to bring in based on the specifics of your home. For a sense of what electricians typically charge by the hour or by project, our electrician hourly rate guide breaks down current Canadian pricing.

Get matched with electricians near you on HomeStars

FAQs: Your Questions About Electrical Socket Types Answered

Is it safe to cut the ground pin off a plug to make it fit an older outlet?

No, this is not a safe workaround. Removing the ground pin disables a safety feature designed to direct a fault current away from the device and away from anyone touching it, which increases the risk of shock if something goes wrong internally. If you have ungrounded outlets in an older home, the better fix is to have a pro assess whether grounding can be added, rather than altering the plug.

Do tamper-resistant outlets cost more to install than standard ones?

Slightly, yes, though the difference is usually modest on a single outlet and falls within the typical $150 to $400 range for a standard replacement. Tamper-resistant outlets have built-in shutters that block objects from being inserted into one slot alone, and they have been required in new Canadian residential construction for several years. If you are budgeting a larger renovation with multiple outlets, you can request an itemized quote from pros on HomeStars so you can see the cost difference clearly.

Can mixing different outlet types in the same room cause a problem?

Not on its own. It is common and fully compliant to have a mix of standard, GFCI and 20-amp outlets in the same room depending on what each one needs to power, such as a GFCI near a sink and standard outlets elsewhere on the same wall. Problems arise only if the wrong outlet type is used for the application, such as a standard outlet installed where code requires GFCI protection. A pro found through HomeStars can confirm your current setup meets code for each area of the room.

What is the difference between a switched outlet and a standard outlet?

A switched outlet is wired so that part or all of it is controlled by a nearby wall switch, commonly used for lamps in rooms without a ceiling light. A standard outlet is always live whenever the circuit has power. Identifying which outlets in a room are switched matters before you start any rewiring or furniture rearranging, since assuming an outlet is always-on when it is not can lead to confusion when something does not turn on as expected.

Can an electrician add a new outlet without opening up the walls?

Often yes, depending on the wall construction and where the new outlet needs to connect to existing wiring. Electricians can fish wire through existing cavities in many cases, or run surface-mounted conduit when fishing isn't possible, which avoids drywall repair. If the new outlet needs power from a different floor or a part of the house with no nearby access point, some opening may still be unavoidable. A pro found through HomeStars can assess your layout and tell you which approach applies before quoting the work.