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Outdoor electrical panel: what Québec’s code allows
What the code says, what it changes for you, and when to act. Checked against official sources.
In short
In Québec, a house’s electrical panel is almost always inside. What is outside is the service entrance: the mast, the cable, the meter base, and sometimes a disconnect switch. A real panel installed outdoors is possible, but it requires an enclosure approved for outdoor use, and it’s only justified in specific cases.
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What’s outside, what’s inside
The confusion is common, and it comes from the word. When someone searches for “outdoor electrical panel”, they almost always mean one of these three things:
| What you see outside | What it is | Who it belongs to |
|---|---|---|
| The vertical pipe on the wall, with a cap | The service mast, which carries Hydro-Québec’s cable | The owner |
| The round or square box with the meter | The meter base | The meter base to the owner, the meter to Hydro-Québec |
| A grey box with a handle | A disconnect switch or an outdoor panel | The owner |
| The box with the breakers, in the basement | The main panel | The owner |
In the vast majority of Québec houses, only the mast and the meter base are outside. The panel itself is sheltered.
When an outdoor panel is justified
There are real cases where it makes sense: a detached garage with its own subpanel, a cottage, a trailer, a pool or hot tub supplied from a distance, a farm building. In these situations, a panel or a disconnect switch is installed outside because there is no inside to protect.
What doesn’t make sense is moving the main panel of a house that has one inside out of it. It costs more, it ages less well, and it fixes no problem that a replacement inside wouldn’t.
The enclosure and the cold
Equipment installed outdoors must be in an enclosure approved for outdoor use: rainproof, able to handle temperature swings, lockable. It isn’t the same enclosure as in the basement, and it isn’t a question of looks.
In Québec, three things attack it. The freeze-thaw cycle, which works the seals. Condensation, when warm air from the building meets cold metal. And road salt in winter, on installations near a driveway.
That’s why we always check whether the real need is elsewhere: very often, what needs replacing is the mast and the meter base, not adding a panel outdoors.
How much does it cost?
Replacing a residential panel (200 A) has its price in the written quote, free of charge. An outdoor installation (a detached garage subpanel, a hot tub or pool supply) is priced after a visit: the distance, the burial method and the enclosure change everything.
A photo of your service entrance and your panel is often enough to point you in the right direction without a visit.
Who is allowed to replace a panel in Québec?
The question comes up all the time, and the answer surprises people: it isn’t a question of skill, it’s a question of law.
“No one may carry out electrical work of any kind, in their own residence or elsewhere for others, unless they are an electrical contractor.” (translated from French)
Corporation des maîtres électriciens du Québec
“A person contravening the Master Electricians Act and the Building Act is liable to a fine of $5,000 to $200,888.” (translated from French)
Corporation des maîtres électriciens du Québec
In other words, even at home, even if you know how to do it. STM Électrique inc. is a member of the CMEQ and holds RBQ licence 5815-0137-01.
What we install. Our replacements are done with Siemens panels, the panel brand we install most often. It isn’t a cosmetic detail: it’s a common brand in Québec whose breakers are found everywhere. The day you need to add one for an EV charger, or replace one in ten years, it’s settled in one visit instead of a special order.
Frequently asked questions
Can my main panel be installed outside?
Technically yes, with an enclosure approved for outdoor use. But in a house that already has a panel inside, it’s rarely a good idea: more expensive, more exposed, and with no real advantage.
Do the mast and the meter base belong to me?
Yes. The mast, the cable up to the connection point and the meter base belong to the owner. The meter itself belongs to Hydro-Québec.
My detached garage needs power. What does it take?
A subpanel fed from the main panel, with a buried or overhead cable depending on the case. We first check that the main panel has the capacity: that’s often where it gets tight.
Can I do it myself?
No. The Master Electricians Act forbids it, even in your own home, and the fine ranges from $5,000 to $200,888.
A doubt about your panel?
Send us a photo and we’ll reply with the next steps.
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Sources
Checked against the official sources below and the municipal by-laws of the city concerned.
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