6 Factors When Choosing CCTV Cable (2026)

A camera that reboots every hour is usually not a camera problem. Voltage drop on an undersized cable is the most common cause of intermittent reboots. A corroded connector causes more night-vision failures than the camera itself. Wholesalers feel this pain at scale. One bad cable SKU in stock means dozens of field callbacks. Every callback costs more than the reel you saved money on.

The six factors below are what actually decide whether a cable run survives years outdoors. They apply whether you are pulling one run for a shop or ordering 500 reels for distribution. Each factor gives you the numbers that matter, what to check on the spec sheet, and what to ask the supplier before you commit inventory.

Keep reading for more!

Key Facts at a Glance

Wire gauge: 23-24 AWG typical for PoE runs; 18 AWG for long power pairs
Conductor: solid copper beats copper-clad aluminum (CCA) on resistance and heat
Shielding: UTP fine for clean sites; STP/FTP when cable runs near motors or mains
Length: Cat5e/Cat6 cap at 100m; RG59 coax reaches 200-300m typical at 1080p
Waterproofing: UV-rated jacket and sealed joints decide outdoor life
Connectors: crimp over twist-on; gold-plated pins resist corrosion

Factor 1: Wire Gauge (AWG)

AWG (American Wire Gauge) describes conductor thickness. Lower numbers mean thicker wire, lower resistance, and less voltage drop. Most CCTV cable SKUs sit in the 18-26 AWG range, and the gauge directly decides how far power travels.

23-24 AWG: typical for Cat5e and Cat6 solid copper, handles PoE to the full 100m run
26-28 AWG: common in cheap patch cables; resistance is roughly double, so PoE range shrinks fast
18 AWG: typical power pair in Siamese coax cable, delivers 12V DC safely over longer runs

A PoE camera drawing 12W at 24 AWG works fine to 100m. The same camera on 26 AWG starts browning out past 40-50m, and the camera reboots in a loop. For IP sites, the standard ethernet cable for cctv camera runs is Cat5e. A Cat5e PoE cable with 24 AWG solid copper holds the full 100m. Older Cat5 PoE cable still carries signal, but check the gauge before you rely on it at distance. For wholesale buyers, the gauge must be printed on the jacket and confirmed on the spec sheet. Reel weight is the only quick field check.

Ask the supplier: "Is the gauge stated per conductor or per pair?" Some datasheets list a combined figure that hides a thin power pair. A Cat5 cable reel that weighs 5kg less than the same length from another factory is usually thinner wire, no matter what the label says.

Factor 2: Solid Copper vs Copper-Clad Aluminum

Copper-clad aluminum (CCA) wraps a thin copper shell over an aluminum core. It costs less per meter and weighs less, which is why it floods budget cable listings. The physics penalty is real and it compounds on long runs.

DC resistance: CCA runs about 1.5-2x the resistance of solid copper at the same gauge
Heat: higher resistance means more heat under PoE load; 30W cameras on CCA over 50m run hot
Brittleness: aluminum work-hardens and snaps where it flexes; solid copper survives re-termination

Industry cabling standards require solid copper for structured cabling. CCA is not certified for PoE in most rating schemes. For a reseller, the failure mode is brutal. A 100m CCA run works at 8W, fails at 15W, and the symptom looks like a camera fault. Your support line eats that. When a buyer asks which cable for cctv security camera systems they should stock, the conductor answer is the same every time: solid copper.

Wholesale check: cut a 10cm sample, scrape the conductor. Copper is uniformly reddish; CCA shows a silver aluminum core. Do this on every sample reel before you order stock.

Factor 3: Shielding

Shielding wraps the conductors in foil, braid, or both, to block electromagnetic interference. CCTV cable runs near motors, VFDs, fluorescent ballasts, and power lines, and that noise lands directly in the video signal.

UTP (unshielded): cheapest, fine for clean sites with no heavy equipment nearby
FTP/STP: foil or braid shield, typical for industrial sites and long parallel runs near mains
S/FTP: foil plus braid, for the worst interference; costs more and needs proper grounding

Coax video cable uses braided shielding measured in coverage percentage. Typical CCTV coax sits at 60-95% braid coverage, and higher coverage costs more but kills more noise. A shield only works if it is grounded at one end; an ungrounded shield is an antenna, not a defense.

For stock planning: one UTP SKU and one shielded SKU cover most orders. Ask the factory which shielding the shielded reel actually uses, because the jacket color alone tells you nothing.

Factor 4: Cable Length and Signal Attenuation

Every meter of cable eats signal. Attenuation is the loss, and it decides the maximum usable run before the picture degrades or the link drops. This is the factor where installers most often misjudge.

Ethernet (PoE): 100m is the hard ceiling per run, 90m of solid cable plus 10m of patch leads
RG59 coax: 200-300m typical at 1080p over AHD/CVI/TVI; signal fades and colors wash out beyond
RG6 coax: thicker core, lower loss, reaches 300-500m typical at the same resolution

Voltage drop follows the same math. A 12V DC supply over 18 AWG power pair holds about 9.5V at 100m under a 1A load, which is below many camera minimums. Above 60-80m, switch to higher voltage, local power, or PoE with a mid-span injector. In practice, a PoE cable cat5e or better covers most IP camera sites. The ethernet cable for camera runs rarely needs to exceed the 100m standard. For analog sites, a coax DVR feed over RG59 or RG6 is the classic layout.

Wholesale rule: stock reels in 305m (1000ft) boxes, the standard cable industry unit. Plan every run under 80% of the rated maximum so temperature and connector loss never push you over the edge.

Factor 5: Waterproofing

Water kills more cable than any other cause. Moisture creeps into joints, corrodes conductors, and raises attenuation until the camera loses sync entirely. Outdoor runs need a jacket and a joint strategy, not just a waterproof label.

Jacket: PE (polyethylene) resists UV and moisture; PVC is indoor-only and cracks outdoors
Gel-filled: water-blocked cores for direct burial and conduit where flooding happens
Joints: outdoor-rated junction boxes, drip loops, and sealed connectors; a taped splice fails in 1-2 years

Typical outdoor Ethernet cable carries an outdoor-rated PE jacket plus UV protection, and it costs 10-20% more than indoor PVC. For wholesale buyers the question is simple: is this reel rated for direct outdoor exposure, or does it need a conduit? The answer changes the price and the warranty claim rate.

Ask the supplier for the jacket material and the UV test report. A reel that ships with indoor PVC but an outdoor label is a warranty claim you will pay for in year two.

Factor 6: Connectors

Connectors are the smallest parts and the most common failure point. A CCTV cable run is only as good as its terminations, and termination quality varies wildly between factory-made and field-made ends.

BNC: crimp connectors beat twist-on for vibration resistance; compression types seal best outdoors
RJ45: pass-through plugs make field termination faster and less error-prone
Plating: gold-plated pins resist corrosion in humid sites; nickel corrodes over time

A bad BNC crimp adds return loss and the picture flickers intermittently, the hardest fault to trace. For a distributor, pre-terminated cable lengths cost more per meter. They cut installer labor and callback rates, which makes them the better SKU to stock. Stock a BNC to BNC connector for joiners and a BNC plug to BNC plug patch lead for testing. A BNC CCTV cable with Siamese power serves the analog market. A BNC connector crimp tool plus a small inventory of BNC connectors for CCTV covers field repairs without holding dozens of SKUs.

Ask the supplier whether the connector is crimp or twist-on, and whether the reel ships with connectors included. Some cheap reels arrive bare, and your customer discovers the missing ends only on site.

Cable Comparison Table

Cable type	Typical use	Max run	Conductor	Shielding	Outdoor rating
Cat5e UTP	PoE IP cameras	100m	24 AWG solid copper	UTP	PE jacket
Cat6 STP	Long PoE, noisy sites	100m	23 AWG solid copper	Foil + braid	PE jacket
RG59 Siamese	AHD/CVI/TVI at 1080p	200-300m	18 AWG power pair	60-95% braid	UV jacket
RG6 Siamese	Long analog runs	300-500m	18 AWG power pair	Dual shield	UV jacket

Quick Answers

Does Cat5e support PoE?

Yes. Cat5e carries PoE and PoE+ to the full 100m run, provided the conductors are 23-24 AWG solid copper. Avoid CCA for PoE: the higher resistance wastes power and generates heat on high-draw cameras.

What is the maximum CCTV cable run?

Ethernet caps at 100m per run. RG59 coax reaches 200-300m typical at 1080p, and RG6 stretches to 300-500m. Beyond those limits, use fiber or add an extender or mid-span injector.

Is copper-clad aluminum cable OK for CCTV?

CCA works for short indoor runs at low power. For PoE, long distances, or outdoor installs, solid copper is the reliable choice, and most cabling standards require it. The small per-meter saving disappears in the first callback.

The Bottom Line

Choosing CCTV cable is a six-factor decision. Gauge drives power delivery. Solid copper beats CCA on resistance. Shielding matches the site. Length fights attenuation. Waterproofing decides outdoor life. Connectors settle termination quality. Wholesale buyers can standardize on two SKUs. One Cat5e solid copper reel and one RG59 Siamese reel cover most orders while keeping inventory lean.

Before you order stock, demand the datasheet, check the gauge and conductor on a cut sample, and confirm the jacket rating in writing. The cable is the cheapest component per meter and the most expensive to replace after install. The extra five minutes of verification pays for itself on the first field callback you never receive.