The Complete Guide to Meter Boxes

What a meter box actually is

A meter box is the weatherproof enclosure that houses a property's metering equipment — the electricity meter, the meter panel it mounts to, the service fuse (SPD or MPD) and the neutral link. It sits at the boundary between the network's supply and the customer's installation, which is why parts of it are sealable by the network. For Level 2 ASP electricians, contractors and builders, the meter box is one of the highest-volume items on a job, and getting the specification right at order time saves return trips and defect notices later.

EVO Electric is a Sydney wholesaler and manufacturer supplying meter boxes to the trade — we do not perform installations. This guide covers how to specify a box so it arrives ready to fit, whether you are wiring a single new dwelling or palletising boxes for an estate rollout.

Standard sizes and what they suit

Meter box footprints are quoted as width x height in millimetres. The size follows the metering layout — the number of meters, the phase configuration and the service protection all dictate how much internal real estate you need. The table below maps common sizes to typical applications.

When in doubt, size up one increment. A cramped box costs far more in labour and rework than the marginal price of a larger enclosure, and it leaves room for the solar, EV and load growth that most properties see over their life.

Materials: steel, stainless and composite

The enclosure material determines corrosion life, weight and price. Choosing the right one is mostly about the environment the box will live in.

• —Powder-coated steel — the default for most metro and inland residential and commercial work; good value and robust when the coating stays intact.
• —Stainless steel — for coastal and marine environments where salt spray attacks powder-coated steel; higher cost, far longer service life near the ocean.
• —Composite and polycarbonate — non-corrosive and non-conductive, useful in aggressive chemical or wash-down environments and where weight matters.

For anything within a few kilometres of the coast, specify stainless or a composite enclosure — powder-coated steel in a salt-laden atmosphere is a false economy that fails inside a few seasons.

Surface mount versus flush mount

Meter boxes install in one of two ways, and the choice affects both the enclosure you order and the wall it sits in. Surface-mounted boxes bolt to the face of a wall or a pole; flush-mounted metering recesses into a brick or rendered wall using a panel-and-surround format rather than a deep box.

IP ratings and weatherproofing

The IP (Ingress Protection) rating tells you how well the enclosure keeps out dust and water. External meter boxes need to shed rain and resist wind-driven spray while still allowing the network to seal the enclosure. Look for a rating appropriate to an outdoor, unsheltered location and confirm the door gasket and sealing provisions are intact.

• —IP54 — dust-protected and splash-proof; a common minimum for sheltered external metering.
• —IP56 — protected against powerful water jets; suited to fully exposed external positions.
• —Check the door seal, drip shield and bottom cable entries stay weatherproof once the box is loaded.

Sealing, access and network provisions

Part of every meter box is the network's territory. The service fuse and the section around the meter are sealed by the network so the supply cannot be interfered with. When you specify and install a box, the sealing provisions must remain intact and accessible — drilled covers, missing sealing screws and panels crowded to the edge are among the most common causes of defect notices.

• —Keep the service fuse (SPD/MPD) and neutral link accessible with working clearance.
• —Do not drill or modify sections the network needs to seal.
• —Leave the meter readable and the door able to close over connected cables.

Mounting height and location rules

Meters must be readable and accessible. Typical practice centres the metering between roughly 900mm and 1800mm above finished ground level, clear of gates, gas equipment, hose taps and anything that obstructs the meter reader. Location rules come from the network's service and installation rules, so always confirm against the local requirements before setting the box.

Boxes hidden behind bins, planting or fences draw defects and estimated bills alike — plan the position for the life of the property, not just the day of connection.

How to order the right box

Ordering well is about giving the wholesaler the metering picture, not just a size. The more of the installation you describe, the more likely the box arrives ready to fit.

• —Number of meters and phase configuration (single or three phase).
• —Service protection required — SPD or MPD, 80A or 100A.
• —Mounting method — surface, flush or pole — and wall finish for flush jobs.
• —Environment — coastal, industrial or standard metro — to set the material.
• —Whether a meter panel, surround or bracket is needed with the box.

If you are supplying a project at volume, ask about staged palletised delivery so boxes arrive matched to the build program rather than all at once. Trade account holders can request a quote for a full metering package rather than pricing each part separately.

Frequently Asked Questions