What size electrical panel do I need for a home with electric baseboard heat in New Brunswick?

Question

New Brunswick Electrical · Accepted Answer

Electric baseboard heating is one of the most common heating methods in New Brunswick, and it places a significant demand on your electrical panel. Choosing the right panel size is essential — an undersized panel won't safely support your heating load plus your other household circuits, while an oversized panel wastes money unnecessarily.

Understanding the Load

Electric baseboard heaters are rated in watts, and each heater draws a predictable amount of current. A standard 1,500-watt baseboard heater on a 240V circuit draws 6.25 amps. The Canadian Electrical Code (CEC) requires that heating circuits be rated at 125% of the continuous load, so that single heater actually needs 7.8 amps of breaker capacity.

Here's where it adds up quickly. A typical 3-bedroom home in Moncton, Saint John, or Fredericton might have:

| Room | Heater Size | Circuit Load (125%) |
|------|------------|--------------------|
| Living room | 2,000W | 13 amps |
| Kitchen | 1,500W | 9.8 amps |
| Master bedroom | 1,500W | 9.8 amps |
| Bedroom 2 | 1,000W | 6.5 amps |
| Bedroom 3 | 1,000W | 6.5 amps |
| Bathroom | 750W | 4.9 amps |
| Hallway | 500W | 3.3 amps |
| Basement | 2,000W | 13 amps |

That's roughly 8,250 watts just for heating — about 34.4 amps at 240V (or 43 amps at 125% CEC rating). And that's a modest home. Larger homes in areas like Quispamsis, Riverview, or Dieppe with 4–5 bedrooms and a finished basement can easily reach 12,000–15,000 watts of baseboard heat alone.

Panel Size Recommendations

100-amp panel: The absolute minimum for a small home (under 1,200 sq ft) with electric baseboard heat. This leaves very little room for future additions like an EV charger, hot tub, or workshop. Most electricians in New Brunswick would advise against this for new installations — it's too tight.

200-amp panel: The standard recommendation for most New Brunswick homes with electric baseboard heat. A 200-amp service provides 48,000 watts of total capacity at 240V, giving you ample room for:
- All baseboard heaters (8,000–15,000W)
- Electric range (8,000–12,000W)
- Electric dryer (5,000W)
- Electric water heater (4,500W)
- General circuits — lights, outlets, appliances (3,000–5,000W)
- Future additions like an EV charger (7,600W for Level 2)

Even with all of these running, you're using roughly 40,000–50,000 watts. The CEC demand factor calculation reduces the actual calculated load (not everything runs simultaneously at full power), so a 200-amp panel typically works well.

400-amp panel (or dual 200-amp): Only needed for very large homes (over 3,500 sq ft) with all-electric heating, multiple EV chargers, workshops with heavy equipment, or homes planning significant additions. Some newer construction in Fredericton's subdivisions or rural properties near Sussex and Woodstock that include heated garages and outbuildings may warrant this capacity.

The CEC Demand Calculation

Your electrician will perform a CEC Section 8 load calculation to determine the exact service size needed. This calculation accounts for:
- First 5,000W of general load at 100%
- Remaining general load at 25%
- Electric heating at 100% (no demand factor for heating — it's all counted)
- Electric range at a demand factor based on size
- Air conditioning (if applicable) — compared to heating, only the larger load counts

Because electric heating gets no demand reduction in the CEC calculation, it has a disproportionate impact on your required panel size compared to gas-heated homes.

Real-World Costs in New Brunswick

Panel upgrade costs vary by scope:

- 100-amp to 200-amp upgrade: $2,500–$4,500 including the panel, new service entrance cable, meter base, and TSANB inspection
- New 200-amp panel installation (new construction): $1,800–$3,000
- Adding a sub-panel for baseboard circuits: $800–$1,500

TSANB (Technical Safety Authority of New Brunswick) requires an electrical permit and inspection for any panel upgrade or new installation. Your electrician typically pulls the permit, but confirm this upfront. NB Power will also need to disconnect and reconnect the service, which may add $200–$500 and a scheduling delay of 1–3 weeks.

Future-Proofing Advice

Given New Brunswick's push toward electrification and the growing popularity of heat pumps (which NB Power actively promotes with rebates), consider that even if you plan to add a heat pump, you'll likely keep some baseboard heaters as backup for the coldest Maritime days when temperatures drop below -20°C. A 200-amp panel gives you the flexibility to add a heat pump, an EV charger, and still maintain your baseboard heating without running into capacity issues.

For new construction or major renovations, 200 amps is the right answer for virtually every New Brunswick home with electric baseboard heat. The marginal cost difference between 100-amp and 200-amp during initial installation is only $300–$500 — far less than upgrading later.

---

Find a Electrical Contractor

New Brunswick Electrical connects you with