Wired analog security systems still run on one simple idea: a siamese cable that carries video on a BNC coax and power on a pair of DC leads, from the camera back to the DVR and a 12-volt supply. Buy the right cable and the right supply and a system works for years; buy the wrong ones and you get rolling lines, night-time dropouts and cameras that reboot. We ranked the BNC cables, splitters and 12V power supplies in our accessories catalog by the camera resolution they are rated for, length, conductor and shielding quality, connector plating, how many cameras a supply can power, certifications, and what hundreds to thousands of owners report after running them through walls and attics.
We have not metered every cable ourselves; the verdicts rest on the spec sheets and on the owner review history, because Do Best Deal ranks on owner-review history and spec sheets, not samples. Prices are not printed because they change daily; every button opens the live Amazon page. If you are choosing the cameras too, our wired security cameras and home security camera systems guides cover them, and our 12V power adapters guide covers general-purpose supplies.
How we picked
- Siamese or power only. Every cable here carries BNC video and DC power in one jacket; the two power picks are 12V supplies made for cameras and DVRs.
- Resolution stated. We list what each cable is rated for, because a 1080p cable on a 4K camera gives a soft, noisy picture.
- Pre-made connectors. All cables arrive terminated, so there is no crimping; the connector plating and included adapters are noted.
- Certified supplies. Both power picks are UL listed or from a camera brand, since a cheap supply is the usual cause of flickering night vision.
- Owner history. Every pick has hundreds of owner reviews; the top two cables have thousands.
The picks
ANNKE 30M/100ft BNC Cable for CCTV Analog Wired Security Camera, White
The ANNKE 100-foot siamese cable is the one most people buy for a single camera run, and thousands of owners have rated it strongly. It uses a pure copper core, which matters because the copper-clad aluminum in the cheapest cables raises resistance and dims the picture over long runs, and it carries ISET certification for the conductor. ANNKE rates it for every analog format up to 5MP over AHD, CVI and TVI, and the jacket is both weatherproof and fire rated, so it can go in a wall, between floors, outdoors or in the ground. The DC leads fit the 5.5 by 2.1 mm barrel that almost every camera uses, and a BNC coupler and an RCA adapter are in the bag to join two cables or send video to a TV. It is not rated for 4K, so 8MP camera owners should use the 4K cables below, and it comes only in white.
- Thousands of owner reviews with a strong rating, the most trusted cable here
- Pure copper, not copper-clad aluminum
- Fire rated and weatherproof for in-wall and outdoor runs
- Free BNC and RCA adapters to join two cables or feed a TV
- Rated to 5MP, not 4K
- White only, which shows dirt outdoors
- Single cable; multi-camera systems need the ZOSI 4-pack
ZOSI 4-Pack 100ft (30m) BNC Video Power Cables, All-in-One Pre-Made Extension Wire for CCTV Security Camera Surveillance DVR Systems, Includes 4 BNC & RCA Connectors and 100 Cable Clips
Wiring four cameras means four cables, four couplers and a bag of clips, and the ZOSI pack puts all of that in one box: four 100-foot pure copper siamese cables in black, four BNC-to-BNC couplers, four BNC-to-RCA adapters and a hundred cable clips. The PVC-45P molding is flexible and weatherproof for runs along fascia boards and through attics, and thousands of owners rate it strongly, most of them installing ZOSI, ANNKE or Swann DVR kits whose included cables were too short. It is rated for 960H through 1080p over AHD, CVI, TVI and CVBS, which covers the majority of installed DVR systems; owners with 5MP cameras report it working but the maker does not promise it, and for 4K you want the 8MP pack below. The 100-foot length is more than most runs need, so plan where the slack will coil.
- Four 100 ft cables plus connectors and clips for one price
- Thousands of owner reviews with a strong rating
- Black jacket disappears along eaves
- Pure copper and weatherproof PVC-45P molding
- Rated to 1080p; use the 4K pack for 5MP or 8MP cameras
- 100 ft is long for a small house, so expect coils to hide
- Connectors are not gold plated
Cables Direct Online 10FT White Premade BNC Video Power Cable Extension Wire for CCTV, Security Camera, DVR, Surveillance System, All in One Plug & Play Cord
Not every camera is 100 feet away. For the camera above the garage door beside the DVR, a shop counter, or testing a camera on the bench before you climb a ladder, a 10-foot cable saves coiling 90 feet of slack. The Cables Direct Online siamese cable is pre-made with BNC on both ends and DC power leads, comes in white or black, and over a thousand owners rate it solidly, most of them using it exactly that way. It is specified for indoor use, so it is not the one to run along an exterior wall, and there are no couplers or clips in the bag. The same range comes in other lengths if ten feet is slightly short. It is the least glamorous pick here and the one installers keep a few of in the van.
- Over a thousand owner reviews with a solid rating
- Perfect for cameras near the DVR, garages and test benches
- White or black to match trim
- Cheapest cable on the page
- Indoor rated only
- Ten feet is too short for most exterior runs
- No couplers or clips included
Power Adapter AC 100-240V to DC 12V 2A (2000mA) & 4-Way Power Splitter Cable for CCTV Security Cameras/DVR/NVR/LED Strip Lights/Routers and More, UL/FCC/CE Certificated (6ft)
Most four-camera DVR kits ship with one power supply and a splitter, and when that supply dies the cameras flicker at night as the infrared LEDs switch on. This ANLINK adapter is the replacement owners reach for and the best-rated product on this page. It delivers 12 volts at 2 amps through a center-positive 5.5 by 2.1 mm plug, comes with a four-way splitter, and is UL listed with FCC approval and Level VI efficiency, which the generic supplies in camera kits usually are not. Several hundred owners rate it excellently. Do the arithmetic before you plug in four cameras: a typical bullet camera draws 300 to 500 milliamps with its infrared on, so four at night can approach the 2-amp limit; for four large infrared cameras use two of these or a higher-current supply. For two or three cameras it is ideal.
- Best owner rating on this page from several hundred owners
- Four-way splitter in the box
- UL listed with Level VI efficiency, rare at this price
- Center-positive 5.5 x 2.1 mm plug fits almost every analog camera
- 2A total; four infrared cameras at night can exceed it
- Six-foot cord is short if the outlet is far from the DVR
- Splitter leads are thin
ANNKE 12V 2A CCTV Camera Power Supply with DC Connector for Security System
When a single camera or a DVR loses power, the fix is a plain 12-volt 2-amp supply from a brand that makes cameras, and that is what ANNKE sells here. It is the same type of supply that ships with ANNKE systems, specified for continuous recording rather than intermittent use, with a reinforced cable, and several hundred owners rate it excellently, most having bought it to replace a kit supply that failed after a year or two. There is no splitter, so it powers one camera or one recorder, which is the right way to run a DVR: give the recorder its own supply rather than sharing a splitter with cameras. The listing is thin on details such as cord length and certifications, which is why the UL-listed ANLINK ranks above it. As a drawer spare for a wired system it is the cheapest insurance there is.
- Excellent owner rating from several hundred owners
- From a CCTV brand, built for round-the-clock operation
- Direct replacement for the supply in most DVR kits
- Inexpensive enough to keep a spare
- No splitter; one camera or one DVR per supply
- Plain listing with few published specs beyond voltage and current
- Cord length not stated
2 Pack 16.4ft (5M) 4K Ultra HD BNC Video Cable Wire, Security Camera Extension Cable, All-in-One Siamese CCTV Power Cable for DVR System, Includes 4 BNC Connectors & 100 Cable Clips
Upgrading to 4K analog cameras exposes cheap cables: single-shield coax that was fine at 1080p shows noise at 8MP. This two-pack of 16.4-foot siamese cables uses double shielding, an aluminum foil layer under a high-density braid, which is why it is rated for 4K, and the PVC jacket is specified for indoor and outdoor use. Four BNC connectors and a hundred cable clips come in the box, and several hundred owners rate it strongly. The short length is the point: it is for the camera over the garage, the one in the hallway beside the recorder, or a shop where the DVR sits under the counter, and the same range runs to 100 feet if you need more. It is a newer generic product, so the review base is smaller than the veteran ANNKE and ZOSI cables, but for 4K cameras near the DVR it is the right cable.
- Double-shielded for 4K signals over short runs
- Two cables plus connectors and a hundred clips
- Strong owner rating from several hundred owners
- Indoor and outdoor jacket
- 16.4 ft only covers cameras close to the DVR
- Newer product with a smaller review base than ANNKE or ZOSI
- Generic brand
4 Pack 100Ft/30M 4K 8MP 5MP All-in-One BNC Video Power Cable, BNC Extension Surveillance Camera Wires for CCTV Camera DVR Systems (8pcs Connectors, 100pcs Cable Clips Included)
If you are wiring a new 5MP or 4K DVR system, or replacing the 1080p cables under an upgraded one, this is the four-pack to buy. The four 100-foot pure copper siamese cables are rated for every analog format up to 8MP over AHD, CVI, TVI and CVBS, the PVC-45P molding is weatherproof, and the box includes four BNC couplers, four BNC-to-RCA adapters, a hundred clips and a manual. Several hundred owners rate it strongly, and the reviews come from people who replaced kit cables and saw the noise in their 4K night footage disappear. It costs more than the ZOSI 1080p pack, which is the one to buy if your cameras are 1080p and will stay that way. As with any 100-foot pack, measure your runs; a run of 40 feet leaves 60 feet to coil in the attic.
- Rated to 8MP, so it suits 4K, 5MP and 1080p systems alike
- Four 100 ft cables with couplers, RCA adapters and clips
- Pure copper and weatherproof
- Strong owner rating from several hundred owners
- Costs more than the 1080p ZOSI pack
- Generic brand with lifetime support by email
- Thick 100 ft coils to manage
Amcrest 60FT 4K Security Camera Cable, BNC, Coaxial, Pre-Made, Compatible with 4K HDCVI, HDTVI, Analog, DVR
Amcrest is a camera company and its 60-foot 4K siamese cable is built to carry everything its HDCVI cameras can send down one coax: video, audio and PTZ control, so a motorized camera needs no extra wire. The BNC connectors are gold plated with riveted joints and the DC connectors are nickel plated, the best plating of any cable here, and the PVC-45P jacket matches the others. Double female couplers are included to join two cables for a 120-foot run. A few hundred owners rate it strongly and it works with any brand of analog or TVI camera that uses BNC and a 2.1 mm barrel, not only Amcrest. Sixty feet is the useful middle length that most suburban runs actually need, and the price per cable is higher than the generic packs, which is the trade for the brand and the connectors.
- Gold-plated BNC connectors, the best plating on the page
- Carries audio and PTZ control over the coax on HDCVI systems
- Strong owner rating from a few hundred owners
- 60 ft is a practical middle length
- One cable, so a four-camera install costs more than the packs
- Only two product images on the listing
- Amcrest branding costs a premium over the generics
Compare the picks
| Product | Type | Length | Rated for | Included | Our score | Our score | |
|---|---|---|---|---|---|---|---|
| ANNKE 100 ft BNC cableANNKE | Siamese cable | 100 ft | Up to 5MP | BNC and RCA adapters | 9.2/10 | 9.2 | See price |
| ZOSI 4-pack 100 ftZOSI | Siamese cable x4 | 4 x 100 ft | Up to 1080p | Couplers, RCA adapters, 100 clips | 9.2/10 | 9.2 | See price |
| Cables Direct Online 10 ftCables Direct Online | Siamese cable | 10 ft | Analog, indoor | None | 8.8/10 | 8.8 | See price |
| ANLINK 12V 2A with splitterANLINK | Power supply | 6 ft cord | 12V 2A, UL listed | 4-way splitter | 9.4/10 | 9.4 | See price |
| ANNKE 12V 2A supplyANNKE | Power supply | Not stated | 12V 2A | None | 9.3/10 | 9.3 | See price |
| 2-pack 16.4 ft 4KLETONDA | Siamese cable x2 | 2 x 16.4 ft | Up to 4K | 4 BNC connectors, 100 clips | 8.9/10 | 8.9 | See price |
| 4-pack 100 ft 4K 8MPANLINK | Siamese cable x4 | 4 x 100 ft | Up to 8MP | Couplers, RCA adapters, 100 clips | 8.9/10 | 8.9 | See price |
| Amcrest 60 ft 4KAmcrest | Siamese cable | 60 ft | 4K HDCVI, TVI, analog | Double female couplers | 9.1/10 | 9.1 | See price |
Match the cable to the camera resolution
Analog HD formats, AHD, CVI and TVI, push a lot of bandwidth down a thin coax, and the higher the resolution the more the cable matters. A 1080p-rated cable like the ZOSI pack is fine for 1080p and usually works at 5MP over shorter runs, but at 4K it produces noise, ghosting and dropped frames, especially at 100 feet. The ANNKE single cable is rated to 5MP; the 4K two-pack, the 8MP four-pack and the Amcrest are rated for 4K. Pure copper matters too: copper-clad aluminum has higher resistance, which both softens the video and drops voltage to the camera over a long run, so the infrared lights dim at night. Every cable here is pure copper.
Powering cameras: splitters, supplies and voltage drop
A 12-volt camera draws most of its power at night when the infrared LEDs come on, typically 300 to 500 milliamps for a bullet camera and more for one with a large array or a heater. Add up the night-time draw of every camera on a splitter and keep the total under 80 percent of the supply’s rating; the 2-amp ANLINK with its four-way splitter comfortably runs two or three cameras, and four small ones. Over a 100-foot siamese cable the thin power leads lose voltage, so a camera at the far end of a long run may see closer to 11 volts; if its night vision flickers, move it to its own supply or shorten the run. Give the DVR its own supply, like the ANNKE, so a camera fault cannot reboot the recorder.
Running the cable
Siamese cable is stiff and the BNC ends are bulky, so drill holes at least three quarters of an inch for the connector to pass. Run cable away from mains wiring and never parallel to it in the same stud bay; cross at right angles if you must. Outdoors, drip-loop the cable before it enters the wall so water runs off rather than in, and wrap the BNC and DC joints at the camera in self-amalgamating tape, because the connectors are the first thing to corrode. Label both ends. The couplers in the ANNKE, ZOSI and Amcrest boxes let you join two cables for a longer run, with a small signal penalty that the 4K cables tolerate better than the 1080p ones.
Related security camera guides
- Start with the main guide: outdoor security cameras, covering 4K, solar, battery and no-subscription picks for the yard and driveway.
- No monthly fees: security cameras without a subscription that record to a card, hub or recorder.
- Panel-powered: solar security cameras for fences, barns and anywhere a cable will not reach.
- No wiring at all: wireless outdoor security cameras, the battery and solar models that mount anywhere.
- Wire-free power: battery-powered security cameras, with the solar and hub options.
- Plug-in and PoE: wired security cameras for a permanent install that records around the clock.
- Faces and plates at distance: 4K security cameras, the 8MP cameras and systems.
- Sharper than 1080p: 2K security cameras indoors and out.
- One camera that turns: pan-tilt security cameras, 360-degree indoor and outdoor models that track motion.
- Light plus camera: floodlight security cameras that replace the motion light above the garage.
- In a light socket: light bulb security cameras that replace a porch bulb.
- At the front door: video doorbells, the wired, battery and no-fee doorbell cameras.
- Fixed, long-range housings: bullet security cameras for driveways and side yards.
- Under eaves and on ceilings: dome security cameras, the dome and turret models.
- No drilling: window security cameras that watch the street through the glass.
- Several cameras at once: home security camera systems with a recorder and local storage.
- Wired kits: PoE security camera systems, one cable per camera for power and video.
- Kits without Ethernet runs: wireless security camera systems, solar, battery and Wi-Fi recorder kits.
- Four cameras in one box: 4-camera security systems.
- On a budget: security cameras under 50 dollars.
- Inside the house: indoor security cameras for living rooms, hallways and garages.
- For the dog or cat: pet cameras with two-way talk and pet detection.
- For the nursery: baby monitor cameras.
- Color at night: color night vision security cameras, the spotlight and low-light sensor models.
- One brand, every type: Reolink security cameras, PoE, Wi-Fi, battery and PTZ.
- Two lenses in one housing: dual-lens security cameras, wide plus zoom and panoramic pairs.
- Several cameras in one box: security camera multi-packs, the 2-packs, 3-packs and 4-packs.
- For 5 GHz routers: 5 GHz Wi-Fi security cameras, the dual-band models.
- Light and alarm built in: security cameras with spotlight and siren.
- Sun-powered and turning: solar pan-tilt security cameras, the 360-degree solar models.
- Older coax wiring: DVR security camera systems, the coax CCTV kits and recorders.
- 4K without Ethernet: 4K wireless security cameras, the 8MP Wi-Fi, battery and solar models.
- No drilling allowed: security cameras for apartments and renters.
What is a siamese cable?
A cable with a coax for video and a pair of DC wires for power moulded into one jacket, terminated with a BNC connector on each end for video and a DC barrel plug and socket for power. It lets one cable serve each camera.
Can I use a 1080p BNC cable with a 4K camera?
It will often show a picture, but with noise, ghosting or dropped frames, especially over 50 feet. Use a cable rated for 4K or 8MP, such as the 4K two-pack, the 8MP four-pack or the Amcrest.
How many cameras can one 12V 2A supply power?
Add up each camera draw with infrared on and stay under about 1.6 amps. For typical bullet cameras that is two to four. Large infrared or heated cameras should have their own supply.
Do these cables work with IP or PoE cameras?
No. IP and PoE cameras use Ethernet cable with RJ45 plugs. BNC siamese cable is for analog, AHD, CVI and TVI cameras that connect to a DVR.
Can I bury BNC cable or run it in a wall?
The ANNKE cable is rated for in-wall, between floors and burial, and the weatherproof PVC-45P cables suit exterior surface runs. For underground use, run any cable through conduit to protect it from moisture and rodents.
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