Should I install a transfer switch in my garage for a portable generator in NB?

Installing a transfer switch in your garage for a portable generator is generally not recommended in New Brunswick. The garage location creates safety hazards with carbon monoxide and fuel vapours, while a transfer switch installation requires professional electrical work that's better suited to your home's main electrical panel area.

Carbon monoxide is the primary safety concern with any generator setup, and garages amplify this risk significantly. Even with the overhead door open, portable generators produce deadly carbon monoxide that can accumulate in enclosed or semi-enclosed spaces. In New Brunswick's winter climate, you'll be tempted to close the garage door to keep snow and cold out while the generator runs — this creates a potentially fatal situation. Carbon monoxide is odourless and can reach lethal concentrations within minutes in an enclosed garage.

Transfer switches should be installed near your home's main electrical panel, not in the garage. A manual transfer switch typically mounts on the wall adjacent to your main panel, with a weatherproof inlet box installed on the exterior wall nearby. This allows you to run the generator outside (at least 20 feet from any doors, windows, or vents) while safely switching selected circuits from utility power to generator power. Professional electricians in NB typically charge $1,500-$3,500 for a complete transfer switch installation, including the switch, inlet box, and connection to 6-10 essential circuits.

NB's winter conditions make generator placement critical. Your generator must run outdoors even in -20°C temperatures and blowing snow. Choose a location on the side or back of your home that's sheltered from prevailing winds but has adequate ventilation. Some NB homeowners build a simple three-sided shelter (open on the downwind side) to protect the generator from snow accumulation while maintaining safe ventilation. Never enclose the generator completely, even in extreme weather.

Fuel storage in garages requires extra caution in New Brunswick's climate. Gasoline vapours are heavier than air and accumulate in low areas of the garage, creating explosion risks near water heaters, furnaces, or electrical equipment. Store gasoline in approved containers, limit quantities to what you need for a few days of operation, and consider using fuel stabilizers for longer-term storage. Propane generators eliminate liquid fuel storage concerns but require proper tank placement outside the garage.

For NB power outages, which commonly last 12-48 hours during winter storms, your essential circuits typically include: furnace or heat pump, one lighting circuit per floor, refrigerator, freezer, well pump (if applicable), and one outlet circuit for electronics and phone charging. A 7,500-10,000 watt portable generator handles these loads for most NB homes, though heat pumps and electric heating require larger units.

When to Hire a Pro: All transfer switch electrical work requires a licensed electrician and electrical permit in New Brunswick. The electrician will size the transfer switch appropriately, ensure proper grounding and bonding, install the weatherproof inlet with appropriate amperage rating, and provide the required inspection. DIY transfer switch installation violates electrical codes and creates serious safety hazards including electrocution risk to utility workers during power restoration.

Consider a standby generator with automatic transfer switch if you experience frequent or extended outages. These permanently installed units start automatically during outages, run on natural gas or propane, and eliminate the need to haul a portable generator outside in winter storms. Professional installation in NB runs $8,000-$15,000 but provides seamless backup power without the safety concerns of portable units.

Need help finding a qualified electrician for transfer switch installation? New Brunswick Garages can connect you with electrical contractors through the New Brunswick Construction Network who specialize in backup power systems for NB homes.