Closing day at a Muskoka cottage is the bookend to opening day, and most owners spend a fraction of the attention on it. The plumber drains the lines, the dock crew pulls the floats, somebody throws the main and locks the door. Spring then arrives with a list of surprises that all trace back to a rushed October afternoon. Here is the cottage closing electrical routine we walk on Lake of Bays, Mary Lake, Lake Vernon, and the Port Carling lakes — the order it goes in, what stays energized, and the documentation that makes the spring opening painless.
The closing principle: selective shutdown, not total shutdown
An older school of thought says throw the main on the way out the door. That is the wrong answer for almost every modern cottage. A fully de-energized cottage in a Muskoka winter is:
- Vulnerable to freeze damage on anything not fully drained
- Invisible to any monitoring or alarm system you have
- Unable to power heat trace on pipes, ice-shedding on the roof, or a temperature-monitored crawlspace heater
- Unable to charge the battery on the standby generator
What you actually want is a selective shutdown — most branch circuits off, a specific list of essential circuits left on. The breakers you leave on are deliberate; the breakers you turn off are deliberate. The label inside the panel door tells the spring opener which is which.
What stays energized on a typical winterized cottage
The "stays on" list for a fully drained, four-season-monitored cottage:
- Main breaker — yes, on
- Panel feed to any sub-panel that feeds heat trace or monitoring
- Heat trace circuits — protected pipe, eave, and roof valley cables, GFCI-protected
- Cellular or satellite alarm panel circuit (most have battery backup; the trickle charger needs the AC)
- Standby generator panel feed (so the trickle charger keeps the battery up)
- Crawlspace or basement freeze-protection heater on its thermostat
- Refrigerator or freezer if anything is being left in it (rare on closed cottages, common on year-round properties used by family in winter)
- Boiler circuit if the cottage has hydronic heat being left on low
What gets shut off: and the order to do it
The shutdown order matters because some circuits depend on others. Do it in this sequence:
- Water heater. Off at the breaker after the plumber drains the tank. A water heater element with no water in the tank will burn out in seconds if left energized.
- Well pump. Off at the breaker after the plumber blows the lines and drains the pressure tank.
- Septic effluent pump (if applicable). Off only if the septic system has been winterized; otherwise leave the alarm panel on its dedicated circuit.
- Dock and boathouse. All dock-circuit breakers off after the dock is pulled or covered. Boathouse circuits off after the lift is up and locked.
- Hot tub. Off only after the tub is drained or chemically winterized per the manufacturer's instructions.
- AC outdoor disconnect. Open the disconnect at the condenser. The indoor air handler stays available so a backup electric heat element can run if it is part of the heat-trace strategy.
- EV charger. Off at the breaker if the car is not coming up over the winter; cap the cable end inside the box.
- General lighting, receptacles, and appliance circuits. Off, one by one, with a final walk to confirm nothing is left running.
Heat trace: the circuit you absolutely do not turn off
Self-regulating heat trace cable wrapped around an exposed pipe or laid in a roof valley does what its name says: it regulates its own output based on the temperature it sees. The cable draws power only when it is cold and draws nothing when it is warm. Turning the breaker off in October because "it is not cold yet" defeats the system entirely. The next freeze in November will burst the pipe.
Heat trace circuits should be:
- On a dedicated branch circuit, GFCI-protected (Class A GFCI breaker at the panel)
- Energized continuously from October 1 through May 1
- Tested at closing — press the GFCI TEST and verify it trips, then reset
- Labelled at the panel with the protected location ("HEAT TRACE — WELL HOUSE", "HEAT TRACE — ROOF VALLEY EAST")
Heat trace cable has a real end-of-life. We see installation dates from 2010–2014 starting to fail GFCI trips in cold weather — the jacket is degraded and water ingress shows up as a leakage current. Detail on heat trace replacement is in our heat trace cable post.
The standby generator at closing
The generator stays available all winter. Closing-day items for the generator:
- Verify the fall service was done (oil, filter, battery, transfer test)
- Run a manual transfer test (kill the main, watch the ATS transfer, restore) to confirm the system will carry the heat trace and monitoring loads in an outage
- Note the unit's exercise schedule. A weekly 12-minute exercise is normal. If the cottage is fully unoccupied, the exercise still happens on its schedule.
- If the cottage has a remote monitoring service (Mobile Link for Generac, OnCue for Kohler), verify the cellular signal at the unit and the account is current
Documentation: the part that makes spring easy
Before you walk out the door, photograph and write down:
- Position of every breaker (which are ON, which are OFF)
- Position of every disconnect (AC, hot tub, dock, well house)
- Heat trace circuits energized — by circuit number
- Monitoring system armed status and last test date
- Generator hours and battery voltage at shutdown
- Photo of the panel face with the cover off, labels visible
That packet lives in a Ziploc inside the panel door. When you arrive in May, the spring-opening walk-through has a reference point. Our spring opening checklist is the counterpart routine.
The cell-modem monitoring case
A small but growing share of Muskoka closings now include a cellular monitoring node — a low-power device that watches power status, temperature, water sensor inputs at the crawlspace and pump house, and alerts the owner over LTE when something is off. The hardware is cheap (under $300 for a decent unit), the cellular plan is $10–20 a month, and the value when the system catches a heat-trace GFCI trip in February is the difference between a $200 service call and a $20,000 burst-pipe insurance claim. We install and wire them as part of closing visits when owners ask.
When to call us
If you want closing done by an LEC (selective shutdown, heat trace test, generator transfer test, full documentation packet), we book Muskoka cottage closings through October and into early November. Request a closing visit and we will get you on the schedule before the freeze-up rush. Full scope of our residential and cottage electrical work is on the services page.