Direct-connect meters are built for the current loads of a typical household — well below what most commercial and industrial sites draw. Trying to force a large load through a standard meter isn't just non-compliant, it's a genuine fire risk.
How CT Metering Works
A Current Transformer (CT) meter doesn't measure the full current directly. Instead, current transformers step down the high current flowing through the main supply cables to a safe, measurable level that the meter can read accurately — allowing precise billing without the meter itself carrying the full load.
When It's Required
Ausgrid and Endeavour Energy set current thresholds above which CT metering becomes mandatory rather than optional — this typically applies to larger retail premises, warehouses, light industrial sites, and multi-tenancy commercial buildings with combined loads exceeding standard direct-connect limits.
Installation and Compliance
CT metering installation requires a Level 2 ASP due to the network-side connection involved, along with compliance certification confirming the CT ratios and metering panel meet your distributor's technical requirements. We handle the full scope as part of our smart and solar metering service, including retailer registration once installed.
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