Flat Possession Electrical Checklist: What to Test Before You Sign

Electrical checklist for a new flat: the short answer

An electrical checklist for a new flat covers five things before you sign the possession letter: the distribution board, the earthing, every switch and socket, the heavy-appliance points, and the papers the builder owes you. Each one takes minutes to check on the day and far longer to fix once your furniture, modular kitchen and false ceiling are in.

Possession day in a new building, in Mumbai or anywhere else, is usually rushed. The builder’s team wants a signature, the flat looks finished, and the walls hide everything that matters. That is exactly why a written list helps. You are not inspecting the wiring inside the walls; you are checking what the wiring does at every point, and asking for the records that prove the rest.

We make the parts a flat’s wiring ends in: switches, sockets, MCBs and MCB boxes, at our works in Marol, Andheri East, Mumbai. This guide is the walk-through we would give a friend collecting the keys. It is for checking, not repairing: anything that needs a cover opened is a job for a licensed electrician, with the MCB off and the circuit tested dead first.

What should you check in a new flat’s electrical work?

In a new flat, check that the distribution board is labelled with one MCB per circuit and an RCCB, that every switch, light, fan and socket works, that heavy appliances have 16A points, that 3 pin sockets are earthed, and that the builder hands over test readings and a wiring drawing.

Split the job into what you can see and what you must ask for:

You check: Every switch and light Every socket Fans and regulators DB labels and spare ways Loose or crooked plates

You ask for: Earth resistance reading Insulation test reading Wiring layout drawing Sanctioned load

Our house electrical layout plan shows how many points a typical 2BHK carries, which is a useful yardstick: if a bedroom has one socket where you expected three, find out now. For the checks a home needs year after year, once you have moved in, use our home electrical maintenance checklist.

How do you check the distribution board (DB) at possession?

Open the DB door, without removing any cover, and check that every MCB has a printed label naming its circuit, that ACs and geysers each have their own MCB, that an RCCB is fitted, that spare ways are left for later circuits, and that the incoming main switch is marked.

Things to look for, all visible from outside the cover:

One MCB per circuit Labels on every way RCCB fitted? Spare ways free Scorch or melt marks Missing blanking plates

Read the face of each MCB. A genuine one carries its rating, breaking capacity and an ISI mark with a licence number; our VIYONA MCBs are 10 kA, made to IS/IEC 60898-1 under licence CM/L-2544151. A gap in the row of breakers should be closed with a blanking plate, never left open.

A box with every way already used leaves nowhere for a future AC. Our MCB box size list shows how many ways a flat usually needs, and our isolator vs MCB guide explains the main switch at the top of the board.

How to check wiring in a new flat without opening walls

To check the wiring in a new flat without opening walls, switch every light, fan and socket on and off, load each socket briefly with a phone charger or a lamp, feel plates for warmth after use, look for scorch marks, and ask the builder’s electrician for written insulation and earth test readings.

The walls hide the cable, but the cable shows itself at the ends. A loose terminal shows as a warm plate, a buzz or a flickering light. A wrongly looped circuit shows as a switch that controls the wrong light, or a socket that only works when a light is on.

Look at the cable where it enters the DB, without touching it. House wire carries its size and standard printed on the sheath: 1.5 sq mm is common practice for lights and fans and 2.5 sq mm for sockets, with heavier sizes for AC and geyser circuits, as our house wire guide explains. Ask which brand and size went in, and note it.

The checks that need instruments, an insulation resistance test and an earth resistance test, are for a licensed electrician. Ask for the readings on paper and keep them with your possession documents.

Which points need 16A, and how do you spot them?

Points for heating and motor loads need 16A: the geyser, every AC, the microwave or oven, an induction hob, the washing machine, the fridge in many homes, and the iron. You can spot a 16A socket by its larger, wider-spaced holes, which take the big 3 pin plug that a 6A socket cannot.

Walk the flat with your appliance list and check each one has a matching point:

Geyser: 16A or higher AC: 16A socket or DP switch Kitchen counter: 16A Washing machine: 16A TV, chargers, lamps: 6A

If a heavy appliance has only a 6A socket nearby, the fix is a new point, not an adaptor. Our 6A vs 16A socket guide draws the line appliance by appliance. For the kitchen and bathrooms, which carry most of a flat’s heavy loads, see our guides to kitchen electrical points and bathroom electrical points.

How do you check earthing in a new flat?

You check earthing in a new flat by asking the builder’s electrician for the earth resistance reading, taken with an earth tester at the earth pit or main earth terminal, and by confirming that every 3 pin socket and every metal-bodied appliance point has its earth wire connected, which only an electrician can verify.

From outside, you can do three things. Confirm every heavy-appliance point is a 3 pin socket, not a 2 pin one. Ask where the earth pit or earth bus for the building and your flat is. And note any tingle from a tap, a geyser body or an appliance during the walk-through, which must be reported at once.

What a line tester cannot do is prove earthing. A neon tester glows on a live phase, nothing more. Our guide on how to check earthing at home covers the safe checks, and types of earthing explains plate, pipe and rod earthing in buildings.

Room-by-room flat possession checklist

Go room by room with a printed plan, and in each room try every switch, fan speed and socket, check the plate sits flush, and compare the points with the drawing you were sold: bedrooms for bedside and AC points, the living room for TV and data, the kitchen and bathrooms for heavy loads.

Bedrooms A door board for light and fan, a bedside board, ideally a 2 way switch for the main light, and an AC point high on the wall. Our 1 way vs 2 way switch guide shows how to test one: the light should switch from either end.

Living room TV sockets at the height of your TV unit, a TV and an RJ45 point if promised, the main board, and the AC point.

Kitchen 16A points for each heavy appliance, a fridge point, chimney and RO points, nothing over the hob or under the sink.

Bathrooms Light and exhaust switches outside, a geyser point with a DP switch, no socket near the shower.

Balcony and utility A washing machine point above the machine, and any outdoor light with its cover shut.

What should you look for on every switch board?

On every board, check that the plate sits flush and square without rocking, that each switch clicks firmly, that sockets grip a plug without wobbling, that low sockets have shutters where children live, and that switches and sockets carry an ISI mark with a licence number.

A rocking plate usually means the concealed box behind it was set crooked in the plaster. Our guide to the junction box vs concealed box explains what sits behind a board, and our concealed box page lists the sizes.

For low sockets in a home with young children, ask for shuttered sockets; we make them across our ranges, such as KEMPS K192 and the VIZA V262 2 pin socket with shutter at ₹78. A plain socket can be swapped for a shuttered one later without touching the wall.

For marks, switches are made to IS 3854 and plugs and sockets to IS 1293. Our guide to IS codes for electrical products lists the rest, and how to spot a fake ISI mark shows how to check a licence number.

What do common electrical snags cost to fix?

Most electrical snags in a new flat cost little in parts: a 6A socket or a modular switch costs well under ₹100 at our MRP, a single pole MCB ₹145 and a 32A DP switch ₹330, so the real cost of leaving a snag is the labour and the wall work after you move in, not the part.

The numbers make the point: parts are cheap, chasing a wall is not. A missing 16A point found after the modular kitchen is fitted means cutting tiles or cabinets. A box set crooked behind a TV unit means moving furniture.

That is why the snag list matters more than its size suggests. For a fuller picture of what wiring and fittings cost, see our guide to house wiring cost.

Which documents should the builder hand over?

The builder should hand over a wiring layout drawing showing every point and circuit, a DB schedule naming each MCB, written earth and insulation test readings, the sanctioned load and meter details, and the make and warranty papers for the switches, sockets, MCBs and wire used in the flat.

Wiring layout saves money at every later repair, because the next electrician knows where cables run before drilling. DB schedule is the label list, on paper. Test readings show the wiring passed when it was handed over.

Sanctioned load matters if you plan more ACs than the builder assumed. Our guide on electrical load calculation shows how to add up your appliances, and our single phase vs three phase guide covers when a flat moves to three phase supply.

Make and warranty tells you whose parts are in the walls. A switch or MCB with a licence number you can check is a better sign than a logo alone.

What should you take on possession day?

Take a printed floor plan, a phone charger and a small lamp to test sockets, a torch, masking tape and a marker to label faults, your phone for photographs, and a neon line tester if you have one, used only to see whether a socket has a live phase.

The kit is simple on purpose: charger lamp torch tape and marker line tester. Plug the charger into every 6A socket and check the phone shows charging. Use the lamp to confirm light points that have no bulb.

VIYONA 811 is a line tester at ₹36 MRP, and the 812 is ₹42, both on our line tester page. A line tester glows when its tip touches a live phase. It does not prove a circuit dead and does not test earthing; our guide on how to use a line tester explains its limits.

Resale flat or new flat: what changes in the checklist?

For a resale flat, the checklist adds the age and condition of the wiring itself: ask when it was last rewired, look for old round switches, fuse carriers instead of MCBs, two-pin-only sockets and brittle or taped cables, because an older installation may need rewiring rather than a few snag fixes.

Signs that point to rewiring: fuses instead of MCBs no earth pin at sockets cracked or brittle insulation frequent trips warm switches. Our guide on when to rewire a house covers each one, and our maintenance checklist explains old wiring colours.

A new building’s flat flips the risk: wiring is new, so the problems are installation mistakes, missing points and unlabelled boards rather than age. In Mumbai, add one seasonal check to both: look for damp patches near outer-wall boards before the monsoon, because seepage into a switch box causes trips and sparking.