Switchgear Maintenance and Inspection in Toronto and the GTA

What Does Switchgear Maintenance Include?

Switchgear maintenance is the scheduled inspection, cleaning, tightening, lubrication and electrical testing of the breakers, bus, switches and protective devices that make up a switchgear lineup. Switchgear inspection is the visual and infrared part of that work, often done with the gear in service, while full maintenance needs a planned shutdown.

Switchgear is the heart of a building or plant distribution system. A typical lineup holds the incoming service section, main and feeder breakers, the horizontal and vertical bus that ties them together, current and potential transformers, protective relays, metering, and in many sites a DC battery or capacitor trip supply. When one part of that chain degrades, the result is rarely gradual: a bus joint that runs hot for months can fail in seconds, and a main breaker that will not trip turns a small fault into a site-wide outage.

On a maintenance visit our crew works through each section in a fixed order so nothing is skipped:

• Enclosure and room: doors, barriers, covers, ventilation, space heaters, signs of moisture or rodents, and housekeeping in front of the gear.
• Bus and connections: insulators, bus supports, joints and cable terminations checked for tracking, discolouration and torque.
• Breakers and switches: racking mechanisms, interlocks, contacts, arc chutes and operating mechanisms cleaned, lubricated where the manufacturer allows, and exercised.
• Protection and control: relays, trip units, ground fault systems, control wiring and the trip supply checked against the settings on file.
• Electrical tests: insulation resistance, contact and bus joint resistance, and the breaker tests described on our circuit breaker testing page.

Switchgear, Switchboards and Drawout Gear: What We Service

We service low voltage switchgear, switchboards, fused switch sections and the busway that ties them together, on systems up to 600 V. The difference matters because each type is built, rated and maintained differently, and the scope of a visit changes with it.

People search "switchgear vs switchboard" more than almost any other switchgear question, and the short answer is construction. A switchboard is usually front-accessible with fixed-mounted, bolted devices, common in commercial buildings and smaller plants. Low voltage switchgear typically uses drawout power circuit breakers in separate compartments with rear access to the bus, and it carries higher short-circuit and continuous ratings. Many lineups also include fused switch sections, a transfer section for standby power or a busway takeoff, and each of those adds its own checks to the visit.

Panelboards and distribution panels downstream of the switchgear are covered on our electrical panel inspection page, and motor control lineups on the MCC maintenance page.

How Often Should Switchgear Be Maintained?

Most switchgear needs a visual and infrared inspection at least once a year and full shutdown maintenance on a cycle of one to five years, with the exact gap set by the gear's physical state, its importance to the site and the room around it. NFPA 70B sets those intervals through an equipment condition assessment, and the worst of the three factors decides the schedule.

The 2023 edition of NFPA 70B turned the document from a recommended practice into a standard with mandatory language and introduced the equipment condition assessment. Condition 1 is gear in good physical shape, in a clean room, where an outage would be an inconvenience. Condition 3 is gear that is aged or damaged, in a harsh environment, or feeding a load you cannot lose. The figures below come from Table 9.2.2 of the 2023 edition (C1, C2 and C3 are the three condition levels), and a manufacturer's instructions still win wherever they are stricter.

Once intervals are set they should be held through at least two maintenance cycles before being stretched, so the trend data means something. NFPA 70B was written in the United States, so in Ontario it binds you only through an insurer, an owner's specification or a contract clause; on the Canadian side we work to CSA Z463. If you need help building the wider schedule, our electrical preventive maintenance programs set intervals for every asset class in one plan.

Energized Switchgear Inspection Versus Shutdown Maintenance

Some switchgear checks are done live and some can only be done with the gear de-energized, locked out and proven dead. A good program uses both: online inspection finds problems between outages, and offline maintenance fixes them and tests what cannot be seen.

NFPA 70B sorts switchgear tests into four groups, numbered 1, 1A, 2 and 2A: two tiers done with the gear live and two done with it dead. On a real site that splits like this:

• Online: exterior visual inspection, panel meter and relay readings, and infrared electrical inspection by our Level II certified thermographers. Where covers cannot be opened safely, IR viewing windows let us scan through the door, but the gear behind the window is no less hazardous for having one.
• Online enhanced: ultrasonic screening at door seams and vents, which can pick up the sound of arcing or tracking inside a closed enclosure, and load readings at the main meter where the scan needs context.
• Offline: cleaning, torque checks, insulation resistance, contact resistance, breaker trip testing, relay testing and mechanism servicing.

We run and grade the offline tests to ANSI/NETA MTS, the 2023 edition of NETA's maintenance testing specification, so each insulation, contact resistance and trip value is judged against a published acceptance figure. For offline tasks we apply Reg. 851, s.42: we isolate the supply, apply locks and tags, have each worker confirm the isolation personally, and work to the written procedure the regulation demands. Energized inspection is carried out under CSA Z462, using the incident energy and PPE information on your equipment labels. Where labels are absent, or the study behind them is older than five years, see our arc flash study service before we open live covers.

How We Plan a Switchgear Shutdown Around Your Operations

We plan switchgear shutdowns weeks ahead, with a written switching order, a time-boxed task list for each section and a restoration check before anyone leaves. The aim is to use every minute of the outage you can give us and to hand the building back on time.

• Scope walk: we review the single-line diagram, nameplates, the last report and any open deficiencies, then confirm which sections, breakers and relays are in scope.
• Window and sequence: plants usually choose a weekend or a scheduled production stop; office and residential towers often prefer an overnight window. We sequence the work so the sections that take longest go first.
• Utility and standby power: where the main service must be opened we coordinate with the local distribution company, such as Toronto Hydro or Alectra, and with your generator or rental power provider so critical loads stay fed.
• Lockout and verification: a single switching lead controls the lockout, tags each point, and confirms absence of voltage before work begins.
• Restoration: covers, barriers and interlocks are checked, breakers are racked in and closed in order, and we take readings under load before signing off.

IHSA has granted KCS its COR, and ISNetworld, Avetta and ComplyWorks already list us as prequalified, so your contractor management office can clear the crew before the outage rather than on the morning of it.

What the Switchgear Maintenance Report Contains

After each switchgear visit you receive a written record of what we found, what we fixed, the test values we recorded and what still needs attention, ranked by urgency.

• Equipment register with nameplate data, location, and the C1, C2 or C3 rating that drives the next due date.
• As-found and as-left condition for each section, with photographs of deficiencies.
• Test results in tables: insulation resistance, contact and joint resistance, breaker trip times and relay pickup values, compared with the previous visit where we have it.
• Infrared findings with the temperature rise and the recommended action.
• Deficiencies ranked as immediate, planned or monitor, with the repair scope for each.
• Condition labels applied to the equipment after maintenance, as NFPA 70B expects, so your staff can read the status at the door.

Because we are a licensed electrical contractor and not only a testing firm, most repairs found during the visit can be quoted and completed by the same crew. For multi-site owners the reports feed into electrical asset management, which turns years of results into a replacement plan.

Ontario Rules That Apply to Switchgear Work

Ontario switchgear work answers first to the Electrical Safety Code, the ESA notification system and the electrical clauses of Regulation 851 (Industrial Establishments). American documents such as NFPA 70B and ANSI/NETA MTS carry no legal force here, yet we follow them as standard practice, and many contracts and insurers write them in.

• Ontario Electrical Safety Code: switchgear replacements and alterations must satisfy the 2024 Code, the 29th edition, which Ontario brought into force on 1 May 2025.
• ESA notification: ESA's position is that every job touching an electrical installation gets a notification, while repairs inside certified equipment belong to its manufacturer or that maker's agents. Holding ESA/ECRA licence #7014042, we file the notifications our switchgear scope triggers.
• O. Reg. 851: section 41 requires a conspicuous warning sign at the entrance to any room with exposed live parts, and section 42 sets the lockout and tagging rules described above.
• CSA Z462 and CSA Z463: the Canadian standards for workplace electrical safety and for maintenance of electrical systems.
• ANSI/NETA MTS and ATS: MTS (2023 edition) sets the test methods for switchgear already in service; ATS (2025 edition) covers a new or replacement section before it is first energized.

Owners with several buildings can ask ESA about its Continuous Safety Services program, where a dedicated inspector, a facility review and an online logbook take the place of separate inspection requests for every job. Where your contract names a particular NETA edition, we scope the testing to it.

Who Needs Switchgear Maintenance, and When It Can Wait

Any facility whose switchgear feeds production, life safety or tenants needs a documented maintenance program. Gear that is new, lightly loaded and in a clean room can run on longer intervals, as long as yearly visual and infrared checks continue.

The owners who call us most often run manufacturing plants, food and beverage processing, distribution centres, commercial office towers and medical buildings. Across the GTA we service gear in the industrial parks of Mississauga, the older plants of Hamilton and the office and institutional towers of Toronto, with service throughout Ontario.

You may not need full shutdown maintenance this year if:

• the gear was acceptance tested at commissioning within the last interval and has no deficiencies on record;
• the last offline visit found Condition 1 equipment and nothing has changed in load, room or criticality;
• a recent infrared scan and visual inspection were clean.

In those cases we recommend keeping the yearly scan and visual check and holding the offline work for the next planned window. Switchgear has no fixed lifespan; age matters less than maintenance history, environment and spare parts support. When a section fails between scheduled visits, our emergency response is there for sites under a KCS maintenance agreement, and our electrical troubleshooting team handles the diagnosis.