What conduit type should I use for exposed electrical in an unfinished NB garage?

For exposed electrical in an unfinished NB garage, use rigid metal conduit (RMC) or electrical metallic tubing (EMT) for the most durable installation that meets code requirements and withstands the harsh Maritime climate.

In New Brunswick's cold, humid conditions, your conduit choice significantly impacts the longevity and safety of your garage electrical system. EMT (electrical metallic tubing) is the most common choice for residential garage applications — it's less expensive than rigid conduit, easier to bend and install, and provides excellent protection for wiring in an unfinished environment. EMT uses compression fittings and couplings, making it straightforward for electricians to install and modify if you add circuits later.

Rigid metal conduit (RMC) offers superior protection and is worth considering if your garage will house heavy equipment, serve as a workshop with potential impact hazards, or if you're planning extensive electrical with multiple circuits. RMC uses threaded connections that create a more robust system, though it costs approximately 30-40% more than EMT and requires more labour to install.

Avoid PVC conduit for exposed garage applications in NB — while PVC is acceptable by code and costs less initially, it becomes brittle in cold temperatures and can crack from impact or thermal cycling. In an unfinished garage where the conduit is exposed to temperature swings from -20°C in winter to +35°C in summer, metal conduit maintains its integrity and provides better grounding continuity.

Proper installation details matter significantly in NB's climate. All metal conduit must be properly grounded and bonded to the electrical panel. Use weatherproof fittings where conduit enters the garage from outside, and seal any penetrations through the building envelope. If running conduit along exterior walls, maintain at least 6 inches clearance from the concrete slab to prevent moisture wicking and corrosion. Support EMT every 10 feet and RMC every 12 feet with appropriate straps or hangers.

Plan your conduit routing carefully before installation. Run separate circuits for general lighting and outlets, garage door opener, workshop areas, and any 240V equipment like EV chargers or heaters. Size your conduit to accommodate future additions — using 3/4-inch EMT instead of 1/2-inch for main runs costs little extra but provides flexibility for additional wires later. A typical two-car garage needs 2-3 circuits minimum, but planning for 4-5 circuits future-proofs your installation.

This electrical work requires a licensed electrician and permit in New Brunswick. The electrician will ensure proper conduit sizing, support spacing, grounding, and integration with your main panel. They'll also coordinate the rough-in inspection before any insulation or drywall installation if you finish the garage later.

Find qualified electrical contractors who understand NB garage requirements through the New Brunswick Construction Network — proper conduit installation is the foundation of a safe, expandable garage electrical system that will serve you reliably for decades.