Low-voltage cable is behind every fire alarm system, security install, and structured cabling run in commercial construction. Supplier choice shapes cost, timeline, and code compliance on every project.

In this guide, low-voltage cable refers to cable used in fire alarm, security, access control, building automation, audio/video, and similar low-voltage systems. For power-distribution cable rated up to 1 kV, see our power cable supplier guides.

The Low-Voltage Cable Market in 2026

Low-voltage systems cable sits at the intersection of two of the largest infrastructure buildouts of the decade: AI data-center expansion and smart-building modernization. Both drive volume across the cable families this article covers.

Structured cabling. The global structured cabling market, which includes Cat5e, Cat6, Cat6A, fiber optic, and related cable used for data and communications, reached USD 20 billion in 2025 and is projected to grow to USD 44.5 billion by 2035, a CAGR of 8.4% for the 2026 to 2035 forecast window. Data centers accounted for 40.8% of application demand in 2025, with copper cabling holding roughly 49% of the product mix as Cat6A and Cat8 handle horizontal-cabling loads.

Fire alarm cable. The fire alarm cable segment reached USD 2.26 billion in 2025 and is projected to reach USD 3.85 billion by 2034, growing at a 6.1% CAGR. Stringent enforcement of NEC Article 760, IBC, and NFPA 72 requirements across new and retrofit construction is the primary demand driver.

What's driving demand:

• AI infrastructure buildout. Hyperscale operator infrastructure spending is projected at more than USD 600 billion in 2026, roughly 36% higher than 2025. Every GPU rack drives structured cabling, fire alarm, security, access control, and building automation cable behind it.

• Smart building integration. Buildings that integrate IoT sensors, PoE-powered lighting, and centralized building management systems increased low-voltage cable demand by roughly 29% year over year in recent reporting.

• Fire safety code enforcement. Updated fire safety codes across most U.S. jurisdictions are driving specification of FPLP, FPLR, and low-smoke halogen-free constructions. Fire-resistant and halogen-free cable adoption exceeded 41% across urban infrastructure projects in 2025.

• PoE adoption. Power over Ethernet has become the delivery mechanism for smart lighting, security cameras, access control readers, and IoT sensors. That preference is driving Cat6A and Cat8 upgrades across enterprise and mid-market buildings.

Headwinds:

• Copper price volatility. The U.S. producer price index for copper wire and cable moved from 531.7 in April 2026 to 570.4 in May 2026. Quarterly copper swings of 6% to 10% translate into 3% to 7% revisions on passive infrastructure quotations, forcing contractors to shorten quote validity from 60 to 90 days down to 15 to 30 days on large tenders.

• Legacy infrastructure upgrade complexity. Cat5e backbones installed during the 2010s expansion cycle are being replaced by Cat6A and fiber, but the cost and complexity of retrofit projects can slow procurement decisions.

For distributors, that mix of factors favors flexible sourcing. Buyers need catalog breadth to cover mixed low-voltage families on a single project and short quote-to-order timelines to lock in prices before copper moves again.

How We Chose the Top Low-Voltage Cable Suppliers

We evaluated suppliers using these criteria:

• Catalog breadth across low-voltage families. A supplier had to carry meaningful selection across fire alarm, security, access control, HVAC and building controls, audio/video, data, coaxial, and instrumentation cable.

• Cut-to-length and small-order flexibility. A full 1,000-foot reel isn't always the right buy. Suppliers with cut-to-length ordering, multiple reel sizes, and small-quantity support ranked higher.

• Direct online purchasing. The ability to browse, price, and buy without a quote cycle.

• Manufacturer access. Distributors that carry products from named low-voltage manufacturers such as Belden and Southwire gave buyers real options when a specification called for a particular brand or construction.

• Contractor-relevant support. Suppliers that primarily serve professional installers and commercial buyers ranked higher.

• Value-added services. Cutting, striping, printing, paralleling, kitting, and custom packaging strengthened a supplier's position.

• Technical breadth. Wider coverage of shielded, jacketed, and application-rated constructions (plenum, riser, direct-burial) means more specs a supplier can fill from stock, without pushing buyers to a specialty distributor for one line item.

The ranking isn't based on company size. Different suppliers lead on different dimensions: logistics scale, catalog breadth, cut-to-length flexibility, and direct online purchasing.

Top Low-Voltage Cable Suppliers

1. Nassau National Cable

Best for contractors sourcing multiple low-voltage families in flexible quantities

Nassau National Cable (NNC) is a U.S. wire and cable distributor headquartered in Great Neck, New York. Its low-voltage catalog spans fire alarm, security, sound, data communications, instrumentation, controls, coaxial, fiber optic, and electronic wire, alongside conventional electrical cable outside the low-voltage category.

NNC offers three things that matter more than raw company size:

• Catalog breadth across low-voltage families in one place. A contractor can source FPLR fire alarm cable, CMR-rated Cat6, RG6 coax, and 18/2 thermostat cable from one supplier.

• Cut-to-length ordering on many products.

• Direct online purchasing without a quote cycle.

NNC also distributes products from established low-voltage manufacturers, including Belden, Southwire, and others on this list. When a spec calls for a specific manufacturer part number, buyers can often source it through NNC without going to a separate distributor.

Best for:

• Contractors sourcing multiple low-voltage cable families for one project

• Fire alarm, security, sound, coaxial, instrumentation, and control cable

• Cut-to-length and full-reel orders in the same catalog

• Direct online purchasing without a quote cycle

• Mixed low-voltage projects, including larger multi-family builds

• Enterprise procurement programs, as a second-line or backup supplier for flexibility and price coverage

• Buyers who need flexible quantities and fast turnaround

When to look elsewhere:

• For enterprise procurement programs that require embedded on-site inventory management or dedicated supply-chain integration teams, Wesco's infrastructure is purpose-built for that model. NNC often serves these same programs as a second-line supplier where flexibility and price coverage matter.

• For buyers that specifically need local branch pickup and a nationwide physical distribution network, Graybar has an advantage.

• For a custom-construction specialty run with unusual jacket, shielding, or environmental requirements, Allied/GCG or OmniCable may have deeper specialized options.

For contractors and commercial buyers sourcing mixed low-voltage projects, including larger ones, NNC combines broad product coverage with flexible quantities, direct online purchasing, and project sourcing.

2. Wesco

Best for enterprise-scale supply-chain and logistics support

Wesco is one of the largest electrical and communications distributors in North America. Its communications and security portfolio covers structured cabling, fire and life safety, access control, surveillance, building automation, networking, and specialty wire and cable.

Wesco's clearest differentiator is its supply-chain infrastructure. Beyond supplying cable, it supports customers with inventory management, material staging, cutting, labeling, kitting, storage, reel management, and scheduled delivery. Those capabilities are particularly useful for enterprise procurement programs and multi-location operations that require coordinated material flow over time.

Best for:

• Enterprise procurement programs

• Multi-site material management

• Managed inventory

• Scheduled material releases

• Contractors that need coordinated logistics across sites

Wesco's logistics capabilities go well beyond what many individual contractors need, but they are a significant advantage when procurement and material management are central to the project.

3. Allied Wire & Cable / GCG

Best for specialized and custom low-voltage constructions

Allied Wire & Cable is part of GCG Connectivity & Power Solutions, a specialty wire, cable, and connectivity supplier.

The broader GCG portfolio includes products for fire alarm, security, HVAC controls, building automation, audio/video, communications, OEM applications, and industrial systems. Through businesses such as Connect-Air, the company holds an especially strong position in low-voltage building systems.

Allied/GCG earns its position when the cable specification goes beyond standard commodity products and factors like shielding, jacket material, conductor configuration, environmental rating, or custom construction start to matter.

Best for:

• Fire alarm

• HVAC controls

• Security

• Building automation

• Audio/video

• OEM applications

• Industrial communications

• Custom cable

Allied/GCG is strongest when the specification calls for a specific construction rather than a commodity substitute.

4. Graybar

Best for buyers needing nationwide branch and local distribution support

Graybar is a major U.S. distributor of electrical, communications, and data networking products. Its low-voltage portfolio covers structured cabling, security, access control, intrusion, surveillance, fire and life safety, signaling, and related communications infrastructure.

Graybar's clearest differentiator is its physical distribution footprint. With more than 350 locations, local inventory, pickup options, an owned delivery fleet, and national logistics capabilities, it is especially useful for buyers that want access to material through a branch network across multiple U.S. markets.

Best for:

• Buyers that value local branch access

• Will-call and local inventory

• Multi-location procurement

• Structured cabling

• Security and access control

• National accounts

Graybar also provides project-management and logistics services, but its nationwide branch network is the more meaningful distinction in this ranking.

5. OmniCable

Best for electrical distributors filling difficult orders

OmniCable is a specialty wire and cable distributor that primarily supports other electrical distributors rather than selling directly to every type of end user.

Its product portfolio covers fire alarm, fiber optic, coaxial, industrial Ethernet, instrumentation, low-voltage lighting, sound and security, control, communications, and other specialty cable families.

OmniCable's strength is filling gaps for downstream distributors: specialty constructions a regional distributor doesn't stock, unusual gauges or shielding requirements, or short-notice orders that require a larger national inventory. Value-added services turn stock cable into custom-configured product and can include cutting, striping, dyeing, twisting, paralleling, pulling heads, custom reel configurations, and other cable preparation.

Best for:

• Electrical distributors

• Specialty cable

• Difficult sourcing situations

• Commercial low-voltage projects

• Custom cable preparation

• Large mixed-product orders

For an end customer, OmniCable isn't always the natural first stop. Within the distribution industry, it's an important resource for filling difficult or specialized orders.

6. Southwire

Best for contractors standardized on a large manufacturer

Southwire is one of the largest wire and cable manufacturers in North America and has expanded its presence in low-voltage building systems.

Its portfolio includes cable for fire alarm, security, access control, building controls, communications, sound, and other commercial applications.

Southwire's biggest advantage is manufacturer scale. Contractors and distributors can source low-voltage products from the same manufacturer they already use for building wire and other electrical cable. Southwire products reach the market through many wire and cable specialists, including Nassau National Cable.

Best for:

• Commercial buildings

• Fire alarm

• Access control

• Security

• Building automation

• Communications

• Contractor-standardized projects

Southwire is most relevant when a project specification favours products from a large, established manufacturer with broad North American distribution.

7. Belden

Best for signal integrity and industrial communication applications

Belden is one of the best-known manufacturers of communication, signal, control, and industrial data cable.

Its portfolio includes multi-conductor and multi-pair cable for security, access control, CCTV, fire alarm, HVAC, industrial automation, audio, intercom, instrumentation, and data communications.

Belden's value is engineered signal integrity. Its cables combine precise impedance control, dedicated shielding, and tight construction tolerances that hold signals clean over long runs and through electrical noise. On a plant floor with variable-frequency drives, contactors, and dense EMI, that's the difference between a working install and constant callbacks. In a CCTV or professional audio run, it's the difference between a clean picture or signal and one degraded by interference.

Best for:

• Industrial automation

• Building controls

• Security systems

• Professional audio

• Fire alarm

• Data communications

• Instrumentation

• Shielded cable applications

Belden is more technical and specification-driven than a commodity cable supplier. Its products are widely available through specialized distributors, including Nassau National Cable.

Which Low-Voltage Cable Supplier Is Right for Your Project?

The right supplier depends on the buyer, not just the cable. Use this matrix to match a buyer profile to a supplier.

Which Supplier Is Best for Fire Alarm Cable?

Under NEC Article 760, fire alarm cable installation requires specific listings depending on the application. FPLP is required for plenum spaces, FPLR for riser applications, and FPL for general use. Confirm the listing required by the project specification before ordering.

For general fire alarm cable across common constructions in flexible quantities, Nassau National Cable is a natural fit for contractor-scale sourcing. For a specification that names a specific manufacturer part number, source through that manufacturer or an authorized distributor.

Which Supplier Is Best for Security and Access Control Cable?

For spec-locked shielded Belden industrial cable, source through an authorized Belden distributor. Belden's engineered signal integrity is the specification-driven answer for security applications where noise resistance and signal quality matter. For local branch inventory across U.S. markets, Graybar provides pickup options through more than 350 locations.

Which Supplier Is Best for HVAC and Building Automation Cable?

Allied Wire & Cable / GCG has one of the strongest specialized portfolios on this list for HVAC control and building automation constructions. Through businesses such as Connect-Air, GCG holds a particularly strong position in low-voltage building systems.

Which Supplier Is Best for Data and Communications Cable?

For industrial data cable with strict signal-integrity requirements, Belden is the specification-driven answer. Its shielding and impedance control provide reliable performance in electrically noisy environments. For enterprise-scale supply-chain and logistics support on large data-and-communications rollouts, Wesco is the natural fit.

Where Can I Buy Low-Voltage Cable by the Foot?

Cut-to-length purchasing is common at Nassau National Cable across a wide range of low-voltage cable families. Cut-to-length orders reduce waste on smaller projects, while full reels are generally more economical on larger installations.

Before You Order: What to Confirm

The lowest-priced cable isn't always the right cable. Confirm the following before you select a supplier or SKU:

• Conductor gauge and count

• Shielded or unshielded construction

• Solid or stranded conductors

• Plenum, riser, or general-purpose rating (CMP, CMR, CM; FPLP, FPLR, FPL)

• Indoor, outdoor, wet-location, or direct-burial suitability

• Voltage rating

• Temperature rating

• Required UL listing and NEC designation

• Reel size or cut-length requirements

• Manufacturer requirements in the project specification

The correct construction and rating for the application matter more than price alone.

Frequently Asked Questions

What is considered low-voltage cable?

In this guide, low-voltage cable refers to cable used in systems like fire alarm, security, access control, building automation, audio/video, HVAC controls, data communications, and similar applications.

The term also appears in the power-cable industry for electrical cables rated up to 1,000 V, which is a separate market from the low-voltage systems cable covered here.

What are the most common types of low-voltage cable?

Common categories include:

• Ethernet and data cable

• Fire alarm cable

• Security and alarm cable

• Access control cable

• Speaker and audio cable

• Coaxial cable

• Thermostat and HVAC control cable

• Lighting-control cable

• Instrumentation cable

• Fiber optic cable

• Industrial control and signal cable