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Coax CCTV Installation Guide

A good coax CCTV install is not just about putting cameras on walls. The job is won or lost in cable routing, power design, BNC terminations, video testing, recorder setup and final proof that every channel records properly day and night.

CCTV Installation Support

Summary

Use this guide when installing a coax or TVI-style CCTV system with a DVR, separate power and point-to-point camera cabling. It is written as a field checklist for technicians who want fewer revisit jobs.

Applies to

  • Coax / TVI / analogue HD style camera systems
  • DVR-based camera installations
  • Single-site home, small business and warehouse installs
  • New cabling or retrofit coax jobs

Difficulty and time

Difficulty: Moderate to advanced

Estimated time: Half day to two days depending on camera count and site complexity

What you will need

  • Cameras, DVR and suitable hard drive already on site
  • Correct power supplies or power distribution box
  • Coax or siamese cable, BNC terminations and test leads
  • Monitor connected to DVR for local commissioning
  • Basic ladder, drill, label system and test tools

What this guide covers

  • Plan the recorder and power layout
  • Run and label the cabling
  • Mount cameras for the actual job
  • Test one channel at a time
  • Set up recording and storage
  • Check night performance
  • Finish with playback and export proof

This guide is for technicians installing analogue HD style CCTV systems over coax, including TVI, AHD and similar DVR-based jobs. It assumes the customer already has the equipment and now needs a clean, methodical installation path.

Coax systems are still very practical on many Australian sites, especially retrofit jobs where the cabling route suits siamese cable, existing coax paths or straightforward point-to-point camera runs. A clean coax job can be fast, reliable and easy to service later if the install order is right.

The mistake we often see is treating every camera run as just video plus power without thinking about voltage drop, joins, external power distribution, baluns, weather sealing, recorder settings and the final incident workflow. A technician needs to commission the system, not just mount it.

If the customer has not chosen a platform yet and is still deciding between brands or recorder families, send them to the Hikvision, HiLook or Dahua buying guides first. This page is about installation and commissioning once the hardware is already on site.

Before you start

Before the first hole is drilled, confirm the recorder location, power strategy, cable routes and the actual purpose of each camera.

  • Confirm which cameras are front door, driveway, cash counter, side path, warehouse roller door or yard views. Do not pull cable before the view plan is agreed.
  • Check whether the DVR hard drive is already installed and whether the recorder location has stable power, ventilation and a monitor path for setup.
  • Decide whether the cameras will be powered from individual plug packs, a central 12VDC box, or another planned power method.
  • Measure or estimate the longer cable runs before choosing wire gauge or final power distribution.
  • Check which cameras are full-colour or deterrence models, because white-light and siren features can affect mounting location and power expectations.
Important

Do not leave the recorder setup until the end

On coax jobs, the fastest way to create a revisit is to mount all the cameras first and only then discover a power problem, a dead channel, a loose BNC or the wrong output format.

Commission channel by channel as the install progresses. If the picture is wrong on channel one, stop there and fix it before pulling ten more cables.

What usually causes this

  • Loose or rushed BNC terminations.
  • Voltage drop on long power runs.
  • Recorder schedules left on unsuitable defaults.
  • Night image faults that were never tested before handover.

Diagram: standard coax / DVR layout

This is the typical small-to-mid-size coax layout with point-to-point runs back to the recorder and a central power path.

[Camera 1]---coax video--------------------
[Camera 2]---coax video---------------------
[Camera 3]---coax video----------------------> [DVR] ---- HDMI/VGA ----> [Local Monitor]
[Camera 4]---coax video---------------------/

[Power Supply / 12VDC Distribution Box]
   |        |        |        |
  +12V     +12V     +12V     +12V
   |        |        |        |
[Cam 1]   [Cam 2]  [Cam 3]  [Cam 4]

[DVR] ---- LAN ----> [Router / Internet] ----> [Phone App / Remote Viewing]

Diagram: siamese cable run to one camera

On many retrofit jobs, one siamese run carries the coax video and the low-voltage power pair to the same camera.

[DVR BNC Channel 1] ================= coax ================= [Camera Video In]

[12VDC PSU +] ---------------- red core -------------------- [Camera +]
[12VDC PSU -] ---------------- black core ------------------ [Camera -]

Use correct polarity, weather sealing and strain relief at both ends.

Diagram: loading-dock or warehouse coax install logic

This shows the practical logic of keeping the recorder and power central while mounting cameras for delivery lanes and roller doors.

        [Roller Door Camera]
                |
                | coax + power
                |
[Dock Camera]---+--------------------------
                                           
                                            > [DVR + HDD + Monitor]
                                           /
[Yard / Gate Camera]----------------------/

Power checks:
- confirm voltage at the camera
- confirm stable image on all channels
- confirm night view after dark or under low light

Step 1: Plan the recorder and power layout first

Start in the comms cupboard, office, plant room or other recorder location. The DVR position controls cable routes, power distribution, monitor access and future servicing.

  • Mount the DVR where it can be ventilated and accessed without climbing over stock or ceiling tiles.
  • Keep the recorder away from damp areas, direct heat and power boards that already run overloaded equipment.
  • If using a central power box, mount it so fused outputs and labels can be checked easily later.
  • Label the intended camera channels before the first cable is terminated.

Step 2: Run and label the coax and power cabling properly

Treat cable pulling as part of commissioning, not just labour. A tidy, labelled cable route saves far more time during testing and fault-finding than it costs on day one.

  • Use one continuous run where possible instead of stacking joins above ceilings.
  • Keep coax away from obvious mains interference paths where practical.
  • Label both ends of every run as soon as it is pulled.
  • Where external cable is exposed, use weather-rated protection and seal entries properly.
  • If using baluns instead of direct BNC termination, keep the pairings and polarity consistent from end to end.

Step 3: Mount each camera for the right job, not just the easiest bracket position

Coax cameras are often installed on existing sites where the easiest mounting point is not the best view. Check height, face angle, glare and service access before final tightening.

  • Front-door cameras should normally be close enough and wide enough to show faces at the point of approach, not just a distant porch view.
  • Driveway cameras should show entry direction, parked vehicles and a realistic night result rather than only tail lights.
  • Roller-door or loading-dock cameras need to avoid looking straight into daylight spill or headlights where possible.
  • If a deterrence or full-colour camera is being used, think about where its white light will spill at night and whether that will annoy neighbours or wash out the scene.

Step 4: Terminate and test one channel at a time

This is the habit that separates clean installs from revisit-heavy installs. As each camera is terminated, prove video and power immediately.

  • Terminate the BNC neatly and avoid twisting or crushing the centre conductor.
  • Check polarity on 12VDC power before plugging into the camera.
  • Bring the camera up on the correct DVR channel and confirm stable live view before moving on.
  • If the image flickers, drops or rolls, stop and check termination, power and channel format before continuing.

Step 5: Configure the DVR properly before smart features and phone access

Once all channels show stable video, move to recorder setup. The technician goal is to leave behind a working evidence system, not just live view.

  • Set the correct time, date and time zone first.
  • Initialise and confirm the hard drive is healthy.
  • Set recording schedules channel by channel rather than assuming the defaults suit the site.
  • Choose whether the site needs continuous recording, event recording, or a mixed schedule.
  • Name channels clearly, such as Front Door, Driveway Left, Warehouse Roller Door or Office Counter.

Step 6: Tune the scene for daytime and night-time separately

A coax job is not finished when the daytime image looks acceptable. Night performance, IR bounce, white-light spill and reflections must be checked before handover.

  • Check domes for reflection issues caused by dirty covers, fingerprints or poor angle.
  • Check IR cameras at night for cobwebs, gutter reflections or wall wash.
  • If the system uses full-colour or flashing-light cameras, confirm the deterrence lighting makes sense for the site and does not destroy the picture at close range.
  • Retest critical views after sunset or under simulated low-light conditions where possible.

Step 7: Finish with playback, export and handover checks

A technician should prove the system can record, search and export before leaving site. That is what reduces future support calls.

  • Play back each channel locally for a known test period.
  • Trigger at least one real incident-style walk test or vehicle pass and confirm it records correctly.
  • Export a short clip to USB to prove the evidence path works.
  • Record admin details, channel map, power layout and any unusual cable notes for the customer or maintenance file.
Worked example

Example: small shopfront with four coax cameras

Situation: A suburban shop needed a straightforward four-camera system covering the front entry, counter, rear staff door and small storeroom. The customer already had a coax kit with a DVR and fixed-lens turrets.

Solution used: The installer used point-to-point siamese runs back to a rear office DVR, central 12VDC fused power, clear channel naming and continuous recording on the counter and entry views with event-style review later.

Why this was chosen: This job did not need network switching or separate camera activation. The cleanest result was a tidy coax install with reliable local playback and a proven export path.

Installation notes: The key choice was mounting the front-door camera wide enough to catch arrivals close to the door, instead of mounting it too high and too narrow.

Worked example

Example: warehouse roller door and yard view

Situation: A warehouse already had cable routes for a coax upgrade, but the long run to the yard camera was creating unstable night behaviour because the original power arrangement was weak.

Solution used: The technician reworked the power layout, re-terminated the failing run, then commissioned the system one channel at a time while checking DVR playback locally.

Why this was chosen: The real problem was not the DVR menu. It was poor physical-layer discipline on a longer run.

Installation notes: The final night test at the roller door and yard was what proved the job, not just the daytime image.

Common mistakes

  • Running all the cabling first and only testing after every camera is mounted.
  • Using the same loose default channel name on every camera.
  • Ignoring voltage drop on long 12VDC runs.
  • Using a narrow lens at a front door and ending up with the visitor only partially in frame.
  • Leaving night checks until after the installer has already packed up.

Troubleshooting table

Symptom What to check What to do next
No picture on one channel Power issue, bad BNC, wrong channel format or a dead camera Test the camera with a short lead at the DVR, then prove power and termination.
Image is unstable or flickering Loose termination, power drop or interference Re-terminate, confirm voltage at the camera and isolate the run.
Good daytime picture but poor night result IR reflection, wrong angle, dirty dome or poor lighting plan Clean the housing, adjust angle and retest after dark.
Footage is missing later HDD not initialised, schedule wrong or overwrite misunderstood Check storage health, schedule and playback method before leaving site.

When to contact support

Contact SecurityWholesalers support when the camera model, DVR model, cabling type and exact symptom are known, and the system has already been tested locally at the recorder with one known-good path.

If the problem looks more like a buying or brand-fit issue than an installation issue, move back to the Hikvision, HiLook or Dahua buying guides rather than guessing with the wrong platform.

Related support guides

Related buying guides

Relevant product categories

Still stuck?

Need help choosing or setting up a system? Contact SecurityWholesalers support with your order number, product model and a clear description of the issue.

Frequently asked questions

  • What cable is normally used for a coax CCTV install?

    Usually coax or siamese cable with video plus power, or a balun-based structured-cable path where the system is designed that way.

  • Should I test each camera as I go?

    Yes. Testing each channel as it is terminated is one of the best ways to avoid revisit jobs.

  • Can long cable runs cause power problems on coax cameras?

    Yes. Long 12VDC runs can suffer voltage drop, especially if the power design was not planned properly.

  • Should a coax CCTV job be checked at night before handover?

    Yes. Night performance is where many CCTV mistakes show up, especially with IR reflection or poor mounting angles.

  • When should I use the buying guides instead of this install guide?

    Use the buying guides if the customer still has not chosen the right brand, recorder path or camera type yet.

Further Reading
Guide Page CCTV Networking Support Overview Overview Guide Page Hikvision Support Guides Guide Page HiLook Support Guides

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