TPN meter box for a three-phase energy meter — houses the electricity meter where the supply enters a home, shop, office or workshop.
- For a three-phase (TPN) service connection — three phases and neutral.
- Houses the three-phase energy meter at the point where the supply enters the premises.
- Keeps the meter and its connections enclosed and away from accidental touch.
- Sold as the box — the energy meter is usually supplied or approved, fitted and sealed by your electricity supplier.
- After the meter, the supply goes to a main switch (a four pole isolator or four pole MCB) and an RCCB — sold separately.
- Suits homes, shops, offices and workshops on a three-phase supply.
- Also available as an SPN meter box for a single-phase connection.
A meter box houses the electricity board's energy meter where the supply enters the premises. TPN stands for three phase and neutral — the four-wire three-phase connection used by larger homes, shops, offices and workshops.
In Tamil Nadu the supply code says the meter is ordinarily installed at the point of entry, at a suitable and easily accessible place decided by the supplier's engineer, and the supplier seals the meter box cover after testing the meter. Check your supplier's requirements before you fix the box.
Buy the box that matches your connection: TPN for three-phase, or our SPN meter box for a single-phase connection. After the meter, fit the main switch and the distribution board — see our four pole isolators, MCBs and RCCBs and our three phase DBs.
Where to use it
- Three-phase service connections for homes and villas.
- Shops, offices, clinics and workshops.
- New connections, and replacing old or damaged meter boxes.
How to install
- Confirm the meter position and any box requirements with your electricity supplier.
- Fix the box level on a firm wall at the service entry, in a dry and easily accessible place.
- Leave the meter connection and sealing to the supplier; your electrician wires the outgoing side to the main switch and DB.
Only the electricity supplier may connect or seal the meter. All other wiring should be done by a licensed electrician.
Frequently asked questions
- What is the difference between SPN and TPN meter boxes?
- SPN is for a single-phase (phase and neutral) connection and a single-phase meter. TPN is for a three-phase and neutral connection and a three-phase meter. Buy the one that matches your service connection.
- Is the energy meter included?
- No. The meter is usually supplied or approved and fitted by your electricity supplier, who also seals it.
- Where should the meter box be fixed?
- At the point where the supply enters the premises, in an easily accessible place — the supplier's engineer decides the exact spot.
- Does the meter box protect my wiring?
- No. Protection comes from the main switch, MCBs and RCCB after the meter.
Buy TPN meter boxes online from Electric Market, Chennai. For site, contractor or bulk quantities, contact us for a quote.