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How to install a multi apartment intercom system

Updated: 22 October 2026

You can pull new cable in a two-dwelling house, and the listing says the kit is easy. How to install a multi apartment intercom system, in that house, is a sequence: confirm two monitors, walk the door and the route, pull the cable the page names, then test that each button rings only its flat. It is not a wiring diagram, and it is not a ranking of the kits on the [multi apartment intercom system comparison](/hub/electronic-surveillance/multi-apartment-intercom-system). Figures are the amazon.co.uk notes from 20 October 2026. If the door is a fire door, or other leaseholders share the panel, you stop before the first hole.

You can pull new cable in a two-dwelling house, and the listing says the kit is easy.

Our top picks

LIBO Smart Home LIBO 7 inch, 2 monitors

Best overall

LIBO Smart Home LIBO 7 inch, 2 monitors
6.4/10about £149.99
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uoweky uoweky 4.3 inch, 3 monitors

Best value

uoweky uoweky 4.3 inch, 3 monitors
5.4/10about £200.99
View offer
Kadongli Kadongli 7 inch, 2 monitors

Alternative

Kadongli Kadongli 7 inch, 2 monitors
4.6/10about £147.99
View offer
On this page
  1. 1.Order of work before any core is terminated
  2. 2.Conduit, hood and the short lead in the box
  3. 3.Mains at the monitors, and when England expects notification
  4. 4.Where you stop

Order of work before any core is terminated

Start with the carton and the building. You want two dwellings and two indoor monitors in that box. Walk the route and look at the door. If that door is a fire door, or the only fastening is a maglock, stop. If other leaseholders share the panel, stop. Buy the cable the listing names. LIBO’s bullet states a maximum audio and video distance of 100 metres if you use RVV4×1.0. The same page prints a night-vision range of 100 metres, and those two claims must not be merged. Pull a new cable. Power the monitors from the supply the listing states. Test one button per monitor before you close the walls. The lock is a separate buy. On LIBO, both buttons have rung both monitors. On a Kadongli replacement, the unlock rang both monitors. If flat A’s button rings flat B, correct the pairing before the plaster goes back.

Conduit, hood and the short lead in the box

A lead in the carton is not the building. Treat a short patch lead as a bench lead. The run in the wall is the cable the listing names. A uoweky review says the cable would not pass the existing tube. If the tube will not take the new cable, replace the route. LIBO notes mention a missing rain hood and rain stopping a unit. A UK review of the Kadongli outdoor unit says it is not suitable for external use. uoweky notes mention plugs that do not fit and missing transformers. An IP54 line does not add a hood the parcel left out. The old-pair choice is on the 2-wire versus 4-wire page.
LIBO Smart Home LIBO 7 inch, 2 monitors

Testsieger

LIBO Smart Home LIBO 7 inch, 2 monitors
6.4/10about £149.99
View offer

Mains at the monitors, and when England expects notification

240 V is a claim about the monitor supply, not an instruction to add a new circuit at the outdoor station. LIBO and Kadongli are listed as corded electric, 240 V, 10 W. uoweky is listed as corded electric, 240 V, 3 W. ANJIELO B0D3HR83HJ does not state power. A domestic plug should be BS 1363. The listing voltage is not evidence that a UK 13 A plug is in the box. Keep the door-entry cable at extra-low voltage and away from 230 V. Approved Document P, for England, treats a new circuit in a dwelling as notifiable. Extra-low-voltage work on an existing circuit may not be. The work still has to be safe under BS 7671. 240 V as a shopping check sits on the buying guide.

Where you stop

Four situations end the DIY sequence. The door is a fire door, or a maglock is the only fastening. You need a new mains circuit in the dwelling. The building already has a Videx, Bticino or Urmet system and only one flat is dead. The panel serves other leaseholders. In each case you call an installer. A marketplace kit does not become a bus because one handset has gone quiet. Which lock lets people out if power fails is the door release page. If the door is not a fire door, finish the sequence: pull, mount, power from the stated supply, and prove one button per monitor.

Common questions

What order should I follow in a two-dwelling house?
Confirm two monitors, walk the door and the route, and stop if the door is a fire door or a maglock is the only fastening. Pull the cable the listing names, then test one button per flat before you close the walls. The lock is a separate purchase.
Can I use the old conduit?
Only if the new cable passes through it without force. A uoweky review says the cable would not go through the existing conduit. Several cores plus one adapter per handset are a different bundle from an old telephone pair. If the tube is too small, run a new route.
The listing says 240 V. Does that mean I wire it to a new circuit?
No. On LIBO, Kadongli and uoweky, 240 V is the corded-monitor claim, at 10 W or 3 W. It is not an instruction to create a new circuit at the outdoor station, and it is not proof of a BS 1363 plug. Use the adapter the kit expects, in a suitable existing socket, and keep the door cable away from 230 V. A new circuit in a dwelling in England is notifiable work.
What if both buttons ring both monitors?
That is a pairing fault, and it is already in the review notes for LIBO and for a Kadongli replacement. Stop before you close the walls. Each outdoor button should ring only its own monitor, and the unlock should follow that flat. Guessing wire colours from another brand’s diagram will not fix it.
When is a fire door or a maglock the point where I stop?
As soon as you see it, before you buy cable. A fire door, or a maglock that is the only way the door stays shut, is an installer job because the release has to behave properly if the power fails and, where an alarm is involved, under BS 7273-4. One dead flat on an existing Videx, Bticino or Urmet bus is the same kind of stop.

Related pages

Best multi-apartment intercom

Multi-apartment intercom system

UK 2 wire vs 4 wire video intercom for a small block

UK multi apartment intercom buying guide for flats

UK intercom door release lock voltage: 12 V or 24 V

Sources

Public UK sources from the digest first, then the amazon.co.uk listings compared on this page. Prices and stars were taken on 20 October 2026. A search-snippet price from that day is context only.

  1. Videx, wired video intercoms (retrieved 20 October 2026)
  2. GAI, access control specifiers' guide, September 2024 (retrieved 20 October 2026)
  3. Citizens Advice, asking for adjustments (retrieved 20 October 2026)
  4. Equality Act 2010, explanatory notes (retrieved 20 October 2026)
  5. Shelter England, landlord responsibilities for improvements (retrieved 20 October 2026)
  6. Secured by Design, homes guide excerpt (retrieved 20 October 2026)
  7. Approved Document P (retrieved 20 October 2026)
  8. ICO, home CCTV systems (retrieved 20 October 2026)