Three phase (TPN) plug and socket enclosure in 20A and 30A — a wall box for a heavy-duty socket outlet that feeds three-phase machines and equipment.
- Three phase (TPN) versions rated 20A and 30A.
- Enclosure for a heavy-duty, metal clad type socket outlet on the wall.
- Used with a metal clad plug of matching rating and pole count.
- Keeps the socket connections enclosed and away from accidental touch.
- Feed it from its own MCB-protected three-phase circuit.
- Suits workshop machines, compressors, pumps and site supplies.
- Single-phase versions are available as our 20A SPN AC box and empty AC box.
A plug and socket enclosure puts a heavy-duty socket outlet in its own wall box, so equipment can be plugged in and removed safely. TPN means three phase and neutral: these enclosures are for three-phase equipment such as workshop machines, compressors and pumps.
Choose 20A or 30A to suit the equipment's current, and use a metal clad plug of the same rating and pole count. Tell us the equipment and we will confirm the matching plug and the parts fitted in the box before you order.
The circuit must be protected by a suitably rated MCB, and the enclosure and socket must be earthed. For air conditioners and other single-phase loads, choose our 20A SPN AC box.
Where to use it
- Workshop machines and compressors.
- Three-phase pumps and motors connected by plug.
- Temporary three-phase supply points on sites.
How to install
- Switch off and isolate the supply, then fix the enclosure on a firm wall near the equipment.
- Bring in a dedicated three-phase circuit with cable sized for the rating, protected by a suitable MCB.
- Connect the phases, neutral and earth as marked, close the enclosure and test with the matching plug.
Three-phase work should be done by a licensed electrician with the supply switched off.
Frequently asked questions
- What is a TPN plug and socket enclosure?
- A wall box with a heavy-duty socket outlet for three-phase equipment — TPN means three phase and neutral.
- 20A or 30A — which do I need?
- Pick a rating at or above the equipment's full-load current, as your electrician advises, and use a plug of the same rating.
- Which plug goes with it?
- A metal clad plug of the same rating and pole count. Ask us to confirm the match before ordering.
- Can I use it for an AC?
- Most home ACs are single-phase — use our 20A SPN AC box. Use this TPN enclosure for three-phase equipment.
- Is it weatherproof?
- It is not described as weatherproof. Install it indoors or under cover, or inside a weatherproof panel.
Buy three phase plug and socket enclosures online from Electric Market, Chennai. For site, contractor or bulk quantities, contact us for a quote.