Old fuse panels and overfusing

Assess older panels, protection, incorrect fuses and exposed energized parts before adding loads or renovating.

VERT / GREEN = documenter · JAUNE / YELLOW = vérifier · ROUGE / RED = arrêter/faire valider.

Accessible energized parts
Do not open/handle; obtain inspection. Oversized/bypassed fuse
Stop using the circuit until professionally corrected. New loads planned
Check capacity and protection before connection. Panel identified and maintained
Keep photos and circuit inventory.

What the professional checks

Check shock/overcurrent protection
Assess capacity, condition and replacement need

Official sources

ESA Ontario — anciens panneaux à fusibles

Checked: 2026-08-22

Tools related to this issue

Whole-home action plan

Open →

Electrification and EV charging

Open →

Explore: Remaining system checks not to miss

Remaining system checks not to miss

This section covers issues that can block a project, cause a loss or become expensive once concealed.

Before closing wallsOld electrical systemPost-renovation commissioningCodes + climate by province

Explore: Edge systems to integrate into the project

Edge systems to integrate into the project

This section covers interfaces that become important when multiple home systems interact.

Smart load management

Explore: Often-overlooked service interfaces

Often-overlooked service interfaces

This section connects systems that cross utility, plumbing, HVAC, envelope and metering boundaries.

Electrical service, mast and meter

Explore: Commissioning and everyday safety

Commissioning and everyday safety

This section helps verify systems after work and document the values that make a home safer to operate.

Electrical panel: circuit directory and mapping

Explore: Post-disaster and legacy systems

Post-disaster and legacy systems

This section connects contamination, storm damage, legacy materials and recommissioning before rebuilding.

Electrical systems after flooding: re-energization