Control4, Crestron, and Lutron are three of the most widely installed smart building and AV control platforms in the UK and international residential and commercial market. All three use proprietary bus wiring to connect keypads, sensors, dimmers, and control devices back to the system processor — and all three specify a particular cable construction for that wiring. Whether you need dedicated OEM-equivalent cable or whether a generic alternative is appropriate is a question that comes up on most installations, and the answer is more straightforward than it might seem.

This guide explains what cable each platform requires, why the specifications are what they are, and what DTECH’s OEM-equivalent range provides for each.

Why these platforms use dedicated cable

Each of these three systems uses a proprietary bus protocol to carry both power and data over the same cable. The bus connects the central processor to keypads, touch panels, dimmers, sensors, and other peripherals across the building. Because the cable carries both 24V DC power and bidirectional control data simultaneously, it needs a specific conductor configuration — heavier gauge for the power pair to minimise voltage drop over the run length, and a shielded twisted pair for the data conductors to reject interference and maintain signal integrity.

This is why Cat5e and Cat6 — the common suggestion when dedicated cable is not to hand — are not ideal substitutes for bus wiring on these platforms. Cat6’s four-pair geometry does not match the wiring layout of these systems, and Control4’s own documentation explicitly states that Cat5e and Cat6 are no longer recommended for bus wiring. The cable the system was designed around is the cable that installs cleanly, terminates correctly, and matches the documentation the next engineer on site will be working from.

The practical argument for OEM-equivalent cable is not that the system will fail with anything else — it often won’t — but that the installation is cleaner, termination is faster, and the cable matches the system’s own wiring guides, which matters for commissioning, troubleshooting, and any future work on the installation.

Control4

Control4’s keypad bus wiring uses a cable with one 18AWG twisted pair for power and one 22AWG or 24AWG twisted pair for data — a straightforward two-pair construction that carries both the 48V bus power supply and the bidirectional control data in a single cable run. The system supports both star and daisy-chain wiring topologies, with maximum bus lengths of 300m per spoke in star topology and 600m total in daisy-chain configurations.

Control4’s own documentation references cables like Belden 1502R and equivalent constructions — the key specification being one 18AWG pair for power and one smaller twisted pair for data. Cat5e and Cat6 are explicitly noted as no longer recommended for bus wiring in current Control4 installation guides.

DTECH’s Control4 OEM-equivalent cable matches this specification — 2x18AWG power pair and 2x22AWG data pair in a single LSZH jacket. The LSZH jacket makes it appropriate for permanent installation in commercial buildings, schools, and any occupied environment where fire performance of installed cabling matters. The cable installs, terminates, and documents in exactly the same way as the manufacturer’s own cable specification.

Crestron

Crestron’s proprietary bus is called Cresnet. It is a four-wire network that provides bidirectional communication and 24VDC power to Cresnet devices — keypads, lighting controllers, shade motors, sensors, touch panels, and other peripherals. The cable construction is one 18AWG pair for 24VDC and ground, and one 22AWG shielded twisted pair for control data. The shielding on the data pair is an aluminium/polyester foil providing 100% coverage.

Crestron’s own CRESNET-NP cable is the reference specification. Maximum run length per Cresnet bus run is approximately 915 metres — considerably longer than most installations will need, but the specification demonstrates the importance of the cable construction for signal integrity over long commercial runs.

DTECH’s Crestron OEM-equivalent cable matches the Cresnet specification — 2x18AWG power pair and 2x22AWG shielded twisted pair data conductors in an LSZH jacket. The yellow jacket colour is the standard identification colour for Crestron bus cable, making it immediately recognisable on site and in the documentation. As with the Control4 equivalent, the LSZH jacket replaces the PVC of the OEM cable to meet the fire performance requirements of UK commercial installations.

Lutron

Lutron’s reference cable is the GRX-CBL-346S, used across its HomeWorks, Quantum, GRAFIK Eye, and Athena systems. The construction is five stranded conductors: two 18AWG conductors (common and power), two 22AWG conductors forming a shielded twisted data pair, and a 24AWG drain wire. This is Lutron’s standard four-conductor control link cable, and it is specified for virtually all Lutron lighting control system installations that use wired keypads and devices.

The 18AWG conductors carry the power; the 22AWG shielded twisted pair carries the MUX data signal. The same cable construction is used across multiple Lutron product families, which means an installer familiar with one Lutron platform will be using the same cable specification across different system types.

DTECH’s Lutron OEM-equivalent cable matches the GRX-CBL-346S specification — 2x18AWG and 2x22AWG shielded in an LSZH jacket. Again, the LSZH jacket is the key distinction from the original PVC-jacketed OEM cable, making the DTECH equivalent appropriate for UK commercial installation environments without compromising the electrical specification the system was designed around.

How the three cables compare

View our automation and control cable range: Automation and control cable

Frequently asked questions

Can I use standard Cat5e or Cat6 for Control4, Crestron, or Lutron bus wiring?

For the IP-connected components of each platform — touch panels, processors, and devices that communicate over Ethernet — Cat6 is the correct cable and works perfectly. For the proprietary bus wiring that connects keypads and peripherals, dedicated control cable is strongly preferable. Control4’s own documentation explicitly states that Cat5e and Cat6 are no longer recommended for keypad bus wiring. The four-pair geometry of Cat6 does not match the wiring layouts of these systems, and the power delivery characteristics of the 18AWG conductors in dedicated control cable are specified to support the device power requirements over the intended run lengths.

What is the difference between OEM cable and OEM-equivalent cable?

OEM cable is the cable sold by the system manufacturer under their own part number — Crestron CRESNET-NP, Lutron GRX-CBL-346S, and so on. OEM-equivalent cable is manufactured to the same electrical specification — the same conductor gauge, the same pair construction, the same shielding — but by a third party, typically with an LSZH jacket in place of PVC. The electrical performance is equivalent; the jacket material is improved for fire safety. DTECH’s OEM-equivalent cables are manufactured to match the conductor specifications of the system manufacturer’s reference cable.

Why do all three platforms use a similar cable construction?

The fundamental requirement is the same across all three: the cable must carry DC power to remote devices and carry bidirectional control data, in a single cable run. 18AWG for power provides low enough resistance to deliver adequate voltage at the end of a long run without excessive voltage drop. 22AWG shielded twisted pair for data provides the signal integrity needed for reliable bidirectional communication. These are well-established electrical engineering principles, not arbitrary choices — which is why the three platforms independently arrived at very similar specifications.

Does using OEM-equivalent cable affect the system warranty?

This depends on the platform and the specific installer programme involved. For Crestron and Lutron certified installer programmes, the requirement is generally that the cable meets the electrical specification — conductor gauge, shielding, and construction — rather than that it carries a specific manufacturer part number. DTECH’s OEM-equivalent cables are manufactured to match those specifications. Installers working under specific manufacturer warranty or certification programmes should confirm the cable requirements with the platform’s installer support before specifying.

Why does the Crestron cable have a yellow jacket?

Yellow is Crestron’s standard identification colour for Cresnet bus cable. In an integrated installation where multiple cable types are running through the same containment — Cat6 for network, speaker cable, HDMI, and Cresnet bus — the yellow jacket makes Cresnet cable immediately identifiable without needing to trace or test individual runs. It is a practical installer convenience that also makes future fault-finding and modifications faster and less error-prone.

Summary

Control4, Crestron, and Lutron all specify a cable with an 18AWG power pair and a 22AWG shielded twisted data pair for their proprietary bus wiring. The three constructions are very similar because the requirement is the same: reliable power delivery and signal integrity over long runs between processor and peripherals. OEM-equivalent cable matches the electrical specification of the manufacturer’s reference cable while providing an LSZH jacket appropriate for UK commercial installations — making it both the practically correct and fire-safety-compliant choice for AV and building automation installers.

If you need help specifying the right control cable for your installation, get in touch with the DTECH team — we supply Control4, Crestron, and Lutron OEM-equivalent cable to AV installers and system integrators across the UK, Europe, and the Middle East.