Access Control Installation: What Happens Above the Ceiling
An access control installation looks simple from the corridor. There is a reader on the wall, a lock on the door and a green light when a card is presented. Most of the work, and most of the cost, sits where nobody looks: above the ceiling.
Lift one tile next to a newly fitted door and you will see the rest of the job. A cable tray, a bundle of cables, fixings, and a route that runs all the way back to a controller. This guide explains what happens up there, why it matters, and what to check before the ceiling closes.
In short:
- The reader is the visible part. The cable route is the larger part of the job.
- Six hidden jobs sit above the ceiling, from surveying the route to making good.
- Cables must be supported and installed to BS 7671, the UK wiring regulations.
- Openings through fire-resisting walls must be sealed after the cables go in.
- The cheapest time to run cables is before the ceiling tiles are fitted.
What does an access control installation include?
An access control installation includes the door hardware, the control equipment, the cabling between them and the software that decides who gets in. Each controlled door normally has:
- A reader: the unit on the wall that reads a card, fob, phone or PIN.
- A lock: a magnetic lock or electric release that holds the door shut.
- An exit device: a button or handle that lets people out.
- An emergency release: usually a green break glass unit beside the door.
- A door controller: the device that makes the decision and powers the lock.
Every one of those items needs a cable. Several cables run from each door back to the controller, and the controller needs mains power and a link to the wider system. On a ten-door project, that is a lot of cable before a single card is issued. This is why access control is priced on the building as much as the equipment.
What are the hidden jobs above the ceiling?
Six jobs sit between the controller and the door. All of them happen out of sight.
1. Surveying the route
Somebody has to decide which way the cables go. A survey checks the ceiling type, the depth of the void, the position of ductwork and lighting, and where walls continue above the ceiling line. A short route on the drawing can turn into a long one on site if a solid wall or a riser sits in the way.
A proper survey is the foundation of any access control installation, because it turns an assumed route into a measured one. It also tells the installer what access equipment is needed to work safely at height.
2. Installing containment
Containment is the tray, basket, conduit or trunking that carries the cables. In the photo above, the cables sit on a perforated metal tray fixed to the structure. If suitable containment already exists, the installer may be able to use it. If it does not, somebody has to supply and fit it, and that needs to be agreed before the work starts. On a new access control installation, containment is often shared with the data cabling, so the two trades need to agree the route early.
3. Pulling and supporting the cables
Cables are pulled along the route, dressed neatly and fixed in place. Support matters for more than tidiness. BS 7671, the UK wiring regulations, requires wiring systems to be supported so they will not collapse early in a fire. In practice that means metal fixings, not plastic clips alone. Loose cables that drop across an escape route can trap people and firefighters.
4. Keeping power and data apart
Reader and data cables carry low voltages. Mains cables do not. BS 7671 sets rules for keeping different types of circuit apart, so access control cables should not simply be tied to the nearest power cable. The controller also needs its own power supply, usually from a fused spur, and somebody has to provide it.
5. Fire stopping
Many walls continue above the ceiling to divide the building into fire compartments. When a cable passes through one, it leaves an opening. That opening has to be sealed with a suitable fire-stopping product. In England, Approved Document B gives the building regulations guidance on fire safety, including openings in compartment walls and floors.
This job is easy to miss because nobody can see it once the tiles are back. The employer, owner or occupier is responsible for fire safety in business premises, so ask who is sealing each opening and how it will be recorded.
6. Making good and closing the ceiling
The last job is putting everything back. Tiles are refitted, damaged ones are replaced, and any holes or chases in the walls are filled and painted. On a finished corridor this takes care, because a marked tile or a patched wall is the first thing people notice. An access control installation is only finished when the corridor looks as it did before the work started.
When should access control cabling go in during a fit-out?
Access control cabling should go in at first fix, before ceilings and walls are closed. First fix is the stage where cables and containment are installed. Second fix is when readers, locks and controllers are fitted and connected.
The order matters. With the ceiling grid open, an installer can run a route quickly and safely. Once the tiles are in and the carpet is down, the same route means lifting tiles, protecting finishes and often working out of hours. The equipment is identical. The labour is not. The same logic applies when a single door is added to an existing system: the route decides the price.
Timing is also a client duty. Under the Construction (Design and Management) Regulations 2015, commercial clients must make suitable arrangements for managing their project, including allowing sufficient time and resources for each stage. Contractors have an important role in planning, managing and monitoring their work. Bringing the security contractor in early helps both sides.
How does access control connect to the fire alarm?
Doors on escape routes must let people out in an emergency. Where a door is held shut electrically, the lock is normally linked to the fire alarm so that it releases when the alarm operates. BS 7273-4 is the code of practice that covers this type of door release.
That link is one more cable above the ceiling, and it often crosses from one contractor’s package to another. Agree who provides the fire alarm interface and who tests it. A door that stays locked during an alarm is a serious life safety failure.
What should you check before the ceiling closes?
Walk the route with the installer while the tiles are still up. Check these points:
- The cables sit on proper containment, with metal supports.
- Access control cables are kept apart from mains cables.
- Every opening through a fire-resisting wall is sealed and recorded.
- Cables are labelled at both ends.
- The fire alarm link has been tested and the doors release.
- Photos of the route are taken for the handover file.
A short inspection at this stage is the cheapest quality check on any access control installation.
Those photos are worth having. They help with future service and maintenance, and they save time when another door is added later.
Frequently asked questions
Why does an access control installation cost more than the equipment?
Most of the cost is labour. Cables have to be routed from each door to a controller, supported, fire stopped and tested. A long or awkward route can cost more than the reader and lock it serves.
Who lifts and replaces the ceiling tiles?
It depends on the agreed scope. Some installers include it. Others assume the main contractor will open and close the ceiling. Confirm this in writing before work starts, along with who replaces damaged tiles.
Can access control cables share a tray with other cables?
Often, yes. They commonly share containment with data and other low voltage cables. They must be kept apart from mains voltage cables in line with BS 7671 and the manufacturer’s instructions.
Does every door need a cable back to a controller?
Most wired doors do. Wireless locks reduce the cabling at the door, but the hubs and controllers behind them still need power and a data connection. A survey will show which approach suits the building.
What happens to the doors when the fire alarm goes off?
Electrically locked doors on escape routes should release so people can leave. The green break glass unit beside the door gives a manual release as well. Both should be tested at handover and at each service visit.
Can access control be added to a finished office?
Yes. It takes more planning, because routes have to be found above finished ceilings and work may need to happen out of hours. The result is the same once the route is in.
Plan the route before you choose the reader
A good access control installation is decided above the ceiling. Get the route, the containment, the fire stopping and the timing right, and the door will work the way people expect.
Full Circuit Fire & Security is SSAIB certified, BAFE accredited and CHAS approved, and designs, installs and maintains fire and security systems across the North West and Yorkshire. We work with facilities management teams and fit-out contractors from first fix to handover. You can read more about us, or contact our team on 01254 665 766 to talk through your project.