Security Camera Cabling Guide: Cat5e, Cat6 & Coax

Why Cabling Is the Most Overlooked Decision in a Commercial Camera Install

Every commercial security camera project starts with a conversation about cameras – resolution, field of view, low-light performance. Rarely does anyone lead with cable. That is a mistake. The cable you run through your walls, conduit, and ceilings is the one component you cannot easily swap out after the fact. Get it right the first time and your system will perform reliably for a decade or more. Choose the wrong cable – or install it carelessly – and you will be chasing intermittent drops, PoE faults, and image degradation for years.

This guide covers every cable type used in modern commercial security camera installations: Cat5e, Cat6, Cat6A, RG59 coax, and fiber optic. We also walk through jacket ratings, outdoor-rated cable requirements, proper termination, and why you should never use a pre-made patch cable inside a wall.

Ethernet Cable for IP Cameras

The overwhelming majority of modern commercial security camera systems use IP cameras powered over Ethernet (PoE). That means a single cable carries both data and power from the NVR or PoE switch to each camera. The cable grade you choose determines how much power you can deliver, how far you can run it, and how immune you are to interference.

Cat5e: The Minimum Acceptable Standard

Cat5e (Category 5 enhanced) is the baseline cable for IP camera installations. It supports Gigabit Ethernet and standard PoE (802.3af, up to 15.4W) and PoE+ (802.3at, up to 30W), which covers most IP cameras on the market today. Cat5e is rated for runs up to 100 meters (approximately 328 feet) – this is a hard limit imposed by the Ethernet standard, not a guideline.

In practice, Cat5e is adequate for existing commercial buildings where it is already in place, and it may be the practical choice for tight retrofit budgets. However, it is not what we recommend for new commercial installs today. Cat5e has a thinner gauge (typically 24 AWG), less stringent crosstalk specifications than Cat6, and offers less margin for longer runs, PoE heat buildup, or future camera upgrades. If you are pulling new cable anyway, spend a few more cents per foot and pull Cat6.

• Supports PoE (15.4W) and PoE+ (30W)
• Maximum run length: 100m (328 ft)
• Adequate for most current IP cameras
• Not recommended for new commercial installs – use Cat6 instead

Cat6: The Right Choice for All New Commercial Installs

Cat6 (Category 6) is the cable we specify on virtually every new commercial security camera project. The upgrade over Cat5e is substantial: tighter pair twisting, a plastic spline separator between pairs, and stricter manufacturing tolerances – all of which dramatically reduce crosstalk and electromagnetic interference (EMI). For PoE systems, this matters more than most installers realize. When four pairs in a cable all carry current simultaneously, they generate heat and mutual interference. Cat6 superior geometry keeps that problem in check.

Cat6 supports PoE++ (802.3bt, up to 90W per port) – important for PTZ cameras, heated camera housings, and high-powered multi-sensor units. It also provides 10 Gigabit Ethernet performance up to 55 meters, leaving headroom for future camera generations with higher bandwidth demands. And because Cat6 connectors are slightly larger and the pairs are more precisely laid, experienced technicians find it easier to terminate cleanly and consistently.

• Supports PoE, PoE+, and PoE++ (up to 90W)
• Maximum run length: 100m for Gigabit; 55m for 10GbE
• Significantly better crosstalk and EMI rejection than Cat5e
• Recommended for all new commercial security camera installations
• Easier and cleaner to terminate than Cat5e

Cat6A: When You Are Future-Proofing Large Facilities

Cat6A (Category 6 Augmented) is the right choice for high-density surveillance environments, large campus builds, and any project where future bandwidth growth is a real consideration. Cat6A supports 10 Gigabit Ethernet at the full 100-meter run – no distance penalty. It features even stricter alien crosstalk (ANEXT) specifications than Cat6 and often comes in a shielded (F/UTP or S/FTP) variant that makes it highly resistant to industrial EMI.

The tradeoff is cost and physical size. Cat6A cable is noticeably thicker and stiffer than Cat6, which can make it difficult to pull through congested conduit or tight bends. It also requires compatible keystone jacks and patch panels designed for its larger diameter. For most mid-size commercial camera installs, Cat6 is the right balance. For large warehouse surveillance grids, manufacturing plants, or backbone runs feeding multiple IDF closets, Cat6A earns its place.

• Full 10GbE performance at 100m – no distance compromise
• Best alien crosstalk rejection in the Cat6 family
• Available in shielded variants (ideal for industrial/EMI environments)
• Recommended for large facilities, backbone runs, and future-proofing

Coaxial Cable: Legacy Analog Systems

RG59: Still in the Field, Not for New Work

RG59 coaxial cable was the standard for analog CCTV installations for decades, and you will still encounter it in existing commercial buildings across the country. RG59 carries a composite analog video signal (and sometimes DC power via a siamese cable arrangement) between analog cameras and a DVR. It supports runs of up to roughly 300 meters for standard-definition analog video, though quality degrades noticeably on longer runs.

If you are maintaining or expanding an existing analog system, RG59 may be a practical short-term solution. But we do not recommend installing RG59 for any new commercial security camera deployment. The reasons are clear: analog cameras are limited in resolution compared to modern IP cameras, coax cannot carry PoE power, there is no path to remote management or smart analytics on an all-analog backbone, and the skills and components needed to support coax systems are becoming increasingly rare among commercial installers.

Any facility still running RG59 should treat that as a migration trigger, not a permanent infrastructure choice. The labor cost of an IP camera conversion is almost always offset by the operational and image quality gains within the first service cycle.

• Legacy technology – still found in existing installs
• Supports analog CCTV video up to ~300m (quality-dependent)
• Cannot carry PoE – requires separate power runs
• Not recommended for any new commercial installation

Fiber Optic Cable: Long Runs, Harsh Environments, Building-to-Building

There are three scenarios where fiber optic cable is not just an option but a requirement for commercial security camera installations.

Runs exceeding 100 meters. Ethernet over copper (regardless of Cat rating) is hard-limited to 100 meters. If your camera is 150 meters from the nearest switch, you have two choices: add a midspan PoE extender or switch to fiber. Fiber – whether multimode (OM3/OM4) or single-mode – eliminates the distance ceiling entirely. Multimode fiber handles building-scale runs up to several hundred meters with ease; single-mode covers distances measured in kilometers.

Building-to-building runs. Direct burial or conduit runs between buildings present a serious grounding and electrical safety challenge when using copper cable. A ground potential difference between two buildings during a lightning strike can destroy equipment and create shock hazards. Fiber is dielectric – it carries light, not electricity – making it the only safe and code-compliant choice for inter-building camera runs.

Electrically noisy environments. Factories, welding facilities, machine shops, and food processing plants generate significant electromagnetic interference. Copper cable – even shielded Cat6A – can pick up enough noise in these environments to degrade image quality or disrupt PoE delivery. Fiber is completely immune to EMI. In industrial camera deployments, fiber backbone runs to edge switches near each camera cluster is the professional-grade approach.

Fiber installations require media converters or PoE fiber switches to bridge the fiber backbone back to the copper last leg that feeds individual cameras. This adds cost but is the only reliable long-term solution for the above scenarios.

• Required for runs exceeding 100m
• Required for all building-to-building camera runs (electrical safety)
• Required in high-EMI industrial environments
• Completely immune to electromagnetic interference
• Multimode for campus distances; single-mode for long-haul runs

Cable Jacket Ratings: Plenum, Riser, and PVC

The plastic jacket surrounding your cable is not just physical protection – it has a fire rating governed by the National Electrical Code (NEC) and enforced by local building inspectors. Installing the wrong jacket type is a code violation and a fire hazard. There are three ratings you need to know.

Plenum (CMP)

Plenum-rated cable uses a low-smoke, flame-retardant jacket (typically FEP or a low-smoke PVC compound) that self-extinguishes and produces minimal toxic fumes when exposed to fire. It is required in any space used for air circulation – specifically, the space above a drop ceiling or below a raised floor in an HVAC system. In commercial buildings, this means most cable runs above suspended ceilings require plenum-rated cable. Plenum cable costs significantly more than riser or PVC, but it is non-negotiable in plenum air spaces. Using PVC cable in a plenum space is a code violation that will fail inspection and can expose the building owner to liability.

Riser (CMR)

Riser-rated cable is designed for vertical runs between floors – specifically, in conduit or enclosed chases that penetrate floor slabs. It has better flame-spread characteristics than standard PVC but does not meet the smoke and fume standards required for open plenum spaces. Riser cable is used in conduit runs between floors and in vertical chases that are not part of the HVAC air-return system. Riser-rated cable may be used in place of PVC but cannot substitute for plenum-rated cable.

PVC (CM)

Standard PVC-jacketed cable is the most common and least expensive option. It is appropriate for in-conduit runs where the conduit itself provides fire containment, and for any horizontal run that does not pass through a plenum air space. If your cable will be enclosed in metal conduit for its entire run and the conduit is properly firestopped at penetrations, PVC may be acceptable – verify with your local AHJ (Authority Having Jurisdiction) before specifying.

When in doubt, specify plenum. The cost difference is real, but it is far less than the cost of re-pulling cable after a failed inspection.

Outdoor-Rated Cable Requirements

Any cable that exits the building, runs across a roof, or is exposed to the elements requires an outdoor-rated jacket. Standard indoor cable – even plenum – will crack, degrade, and fail when exposed to UV radiation, temperature cycling, and moisture. Here is what to specify for outdoor camera runs.

UV-Resistant Jacket

All outdoor cable must carry a UV-resistant jacket rating. Polyethylene (PE) jackets are the standard for outdoor applications. This is the minimum requirement for any cable exposed to sunlight, even if it is just running along the exterior of a building under an overhang.

Direct Burial (Gel-Filled)

For cable buried directly in the ground without conduit, specify gel-filled direct burial cable. The flooding gel inside the cable prevents moisture from wicking along the conductors – a common failure mode for non-gel cable in wet climates. Gel-filled cable is messier to terminate but it is the only reliable choice for direct burial without conduit.

Shielded Outdoor Cable

For outdoor runs in environments with high EMI exposure – rooftop runs near HVAC equipment, exterior walls adjacent to electrical panels, or industrial exterior camera clusters – consider shielded outdoor cable (F/UTP or S/UTP). The shielding blocks externally induced interference and also helps with lightning-induced transient voltages, though proper surge protection at both ends remains essential regardless of cable shielding.

Whenever possible, run outdoor cable in conduit. Conduit protects against physical damage, UV degradation, and makes future cable replacement a pull-and-push operation rather than a re-dig or re-drill. Metal conduit also provides some degree of EMI shielding and can be bonded to building ground for added lightning protection.

Proper Termination: T568B and Why It Matters

The most common cause of field-terminated cable failures is improper termination. For IP camera installations, all Cat5e and Cat6 cable should be terminated to the T568B wiring standard (the near-universal commercial standard in North America). T568B assigns the pairs as follows at each RJ-45 connector: pin 1 – orange/white, pin 2 – orange, pin 3 – green/white, pin 4 – blue, pin 5 – blue/white, pin 6 – green, pin 7 – brown/white, pin 8 – brown.

Both ends of the cable must use the same standard (T568B to T568B for a straight-through patch cable). Mixing T568A on one end and T568B on the other creates a crossover cable – which will not work correctly with PoE switches and modern camera equipment that auto-MDI/MDIX.

Beyond pin assignment, proper Cat6 termination requires:

• Maintaining pair twist as close to the connector as possible – untwist no more than 13mm (half an inch) per pair
• Using a Cat6-rated keystone jack or plug – Cat5e connectors are not dimensionally interchangeable with Cat6 in most cases
• Seating the cable jacket inside the strain relief boot – do not terminate with bare conductors exposed at the plug entry
• Verifying with a cable tester (not just a continuity tester) – test for wiremap, length, attenuation, and near-end crosstalk (NEXT)

Why Pre-Made Patch Cables Must Never Be Used for In-Wall or In-Conduit Runs

Walk into any IT closet and you will find pre-made patch cables – those factory-terminated cables with molded boots, available in any length from 1 foot to 50 feet. They are convenient, inexpensive, and entirely inappropriate for any in-wall or in-conduit camera cable run.

Here is why. Pre-made patch cables use stranded conductors – multiple thin wires twisted together inside each of the eight conductors. Stranded cable is flexible and forgiving, making it ideal for the constant flexing of patch panel connections. But stranded cable has measurably higher attenuation per unit length than solid-conductor cable, meaning it loses more signal over distance. On a 60- or 80-meter camera run, stranded cable can push you out of spec for both Ethernet and PoE delivery.

More critically, pre-made patch cables are not rated for in-wall installation. They do not carry the CMR or CMP jacket ratings required by the NEC for permanent wiring. Installing a stranded patch cable inside a wall is a code violation, a fire hazard, and a performance liability rolled into one.

For all permanent camera runs – whether in-wall, above ceiling, or through conduit – use solid-conductor bulk cable (Cat6 or Cat5e solid) and field-terminate it at both ends. Save the pre-made patch cables for the 3-foot connection between your patch panel and your PoE switch.

Summary: Choosing the Right Cable for Your Project

The cable decision is not glamorous, but it is foundational. Here is the quick-reference summary for commercial security camera installations:

• New commercial install (standard runs): Cat6 solid-conductor, CMR or CMP rated depending on installation location
• High-density or large-facility backbone: Cat6A, shielded variant for industrial environments
• Runs exceeding 100m or building-to-building: Fiber optic with edge PoE switches
• Industrial or high-EMI environments: Shielded Cat6A or fiber optic backbone
• Outdoor runs: UV-rated outdoor Cat6; gel-filled for direct burial; conduit wherever possible
• Existing analog systems: RG59 siamese for maintenance; plan migration to IP at next refresh
• Never: pre-made patch cables in walls, PVC cable in plenum spaces, or unshielded copper between buildings

If you are planning a new commercial camera installation or upgrading an existing system, Edge Business Security Cameras can help you specify the right cable for your facility, handle all permitting, and install it correctly the first time. Contact us to schedule a site assessment.

About the Author

Bobby Edwards is the Operations Manager at Edge CCTV, where he has been overseeing commercial security camera installations across the Southeast since 2014. A TRENDnet Certified Network Engineer (TNCE) and GA 811-credentialed technician, Bobby manages installation crews, designs camera layouts for new projects, and ensures every system meets the technical standards that keep it running for years. More from Bobby Edwards.