Why is my hydro meter hot?

A hot hydro meter is an urgent service-equipment warning

A hydro meter should not be noticeably hot because the meter and socket carry the full service load for the house. A little warmth from direct sun on the glass or cover is different from heat coming from the meter base, lugs, conductors, or wall around the socket.

Do not touch the meter again to “check it.” Do not pull the meter, break the utility seal, open the meter base, or spray it with water. The line side of the meter is supplied directly by the utility and is not protected by your main breaker. Even if you turn the main breaker off, parts of the meter socket can still be energized.

Treat the situation as urgent if you notice any of these signs:

• Heat you can feel near the meter base, conduit, or siding around the meter
• A burning smell, melting plastic, scorch marks, or brown staining
• Buzzing, sizzling, crackling, or intermittent arcing sounds
• Lights dimming or brightening across the whole house
• The meter enclosure pulling away from the wall or showing rust
• Water entering the meter base, mast, or conduit
• The main panel also feeling hot or showing heat damage

If there is smoke, visible arcing, fire, or a burning smell that is getting worse, stay away from the meter area and call emergency services. If the heat is present but there is no active fire, stop using large loads such as an EV charger, range, dryer, hot tub, air conditioner, or electric heat until the service equipment is assessed.

For the panel side of the same problem, see why an electrical panel can feel hot. A hot meter is different because the utility meter, meter socket, service conductors, and main disconnect may all be involved.

The usual causes are loose meter jaws, overload, corrosion, or weather damage

The most common serious causes are high-resistance connections inside the meter socket or service equipment. When a connection loosens or corrodes, current still flows, but the poor contact turns electrical energy into heat. That heat can damage the meter jaws, conductors, insulation, socket, siding, and the main service connections.

Loose meter jaws are a specific meter-socket failure. The meter plugs into spring-loaded jaws, and those jaws must hold the meter blades firmly. If they lose tension, are pitted from arcing, or are contaminated by corrosion, the contact area shrinks. A small contact area carrying whole-house current can overheat quickly.

Overload can be part of the picture, especially in homes where newer loads have been added over time: EV charging, hot tubs, basement suites, electric ranges, heat pumps, or large air conditioning. The load itself may be normal, but a weak socket, undersized service, old fuse equipment, or damaged conductor termination can heat under that demand.

Corrosion and weather damage matter because the meter is outside. A cracked hub, missing seal, damaged conduit, poor drip loop, shifted mast, or loose mounting can let water into equipment that was meant to stay dry. Once moisture gets in, metal parts oxidize, connections loosen, and insulation can break down.

If a breaker also feels unusually hot, compare the symptoms with why a breaker feels hot. If the issue appears to involve the grounded conductor or abnormal voltage behaviour across the home, a hot neutral wire is another serious related symptom.

The safe first step is to reduce load and keep away from the meter

Your safest move is to stop adding current through the hot service equipment while you arrange professional help. If you can do it without going near the meter, switch off large loads from inside the home. Use the thermostat, appliance controls, EV charger app, or breakers only if the electrical panel area is normal, dry, and safe to access.

Do not stand in front of a damaged meter base and do not lean tools, ladders, or wet snow shovels against it. Keep children and pets away from the outside meter location. If the meter is on a shared driveway, walkway, porch, or narrow side yard, block off the area until it is checked.

Useful information to collect from a safe distance:

• When you first noticed the heat
• Whether it happens only during heavy electrical use
• Whether lights flicker throughout the house or only on one circuit
• Whether the meter glass, metal ring, socket, conduit, or wall is warm
• Any recent work: EV charger, hot tub, panel change, siding, roof, mast, generator, or renovation
• Whether there has been wind, ice, impact, flooding, or water entry near the meter

At City Power Electrical Services, we handle 24/7 emergency electrical calls in Toronto and the GTA, and service-equipment concerns are the type of problem that should be inspected by a licensed electrical contractor before normal use continues.

If the meter heat is mild and only from sunlight, the enclosure should cool when shaded and when house load is low. If the socket, conduit, or wall stays hot, or if heat appears during appliance use, treat it as an electrical fault until proven otherwise. A basic visual check from the ground is fine; opening equipment is not.

Meter-base repair may need the utility, an ESA notification, and inspection

Repairs at the meter usually require coordination because the equipment crosses the boundary between the utility’s meter and the customer’s service equipment. In Ontario, the utility controls the meter, seal, and connection to its supply. A licensed electrical contractor handles the customer-side service equipment, and ESA involvement may be required where repair or replacement work is performed.

The sequence often looks like this:

• A licensed electrician assesses the symptoms and identifies whether the issue is at the meter base, service mast, main disconnect, panel, grounding, or utility side.
• If the meter must be removed or the service must be disconnected, the utility is coordinated. This can involve Toronto Hydro, Alectra, Hydro One, Elexicon, Oshawa Power, Oakville Hydro, Burlington Hydro, or the local distributor for your address.
• Where required, an ESA notification is filed before the electrical work proceeds.
• The damaged meter socket, conductors, lugs, mast components, grounding/bonding parts, or related service equipment are repaired or replaced.
• ESA inspection is completed where required before or around reconnection, depending on the work and utility process.
• The utility reconnects or reseals the meter as applicable.

This is not a “tighten one screw and leave” situation unless the inspection proves it is minor and safely accessible. A hot meter socket may have heat-damaged conductor insulation, softened plastic, pitted meter jaws, carbon tracking, or hidden moisture paths. Once arcing has occurred, the contact surfaces may no longer be reliable even if the meter seems to work again.

A comprehensive electrical safety inspection in the GTA is typically $250–$400. Meter-base repairs, service upgrades, or utility-coordinated work are quoted in writing after a site visit because the scope depends on the socket condition, service size, utility requirements, access, wall finish, mast condition, and whether the main panel also needs correction.

If the inspection shows the service is undersized or deteriorated, the repair may become a panel or service upgrade rather than a small meter-base repair. That is especially common where older service equipment is already at capacity and the heat appears during high-demand use.

The inspection checks the whole service path, not just the glass meter

A proper inspection follows the load path from the utility connection to the main panel because heat at the meter can be the visible symptom of a problem elsewhere. The meter face may be the part you see, but the failure can be at the socket jaws, line lugs, load lugs, neutral block, service mast, grounding electrode conductor, main breaker, or panel bus.

The electrician will typically check:

• Meter base condition, mounting, rust, sealing, hub, and signs of water entry
• Service mast, conduit, weatherhead, conductors, and mechanical support
• Visible heat damage, staining, melted parts, or arcing marks
• Main disconnect, panel bus, main lugs, neutral and bonding connections
• Service size and whether recent loads have changed the demand profile
• Voltage stability and signs of abnormal voltage between legs or to neutral
• Grounding and bonding condition where accessible
• Thermal patterns under load, when it is safe to test energized equipment

The ESA inspection, when required, is not just paperwork. It is the safety check that confirms the repaired service equipment is installed to the Ontario Electrical Safety Code requirements that apply to the job. The utility may also have its own reconnection requirements before the meter is resealed.

Book an electrical safety inspection for a hot meter if the meter base, service mast, or main service area is warm, stained, buzzing, corroded, or weather-damaged. For more emergency troubleshooting topics, the electrical answers hub groups related symptoms so you can separate a circuit problem from a service-equipment problem.