Camden Duranodic (dark bronze) finish 18\" - CM-PT250AL-DUR-18

We've installed hundreds of door control systems across retail, hospitality, and corporate facilities, and power transfer cables like the CM-PT250AL-DUR-18 are an overlooked cost-control lever. Most integrators grab whatever conduit is at hand — galvanized steel (heavy, rusts), PVC (cracks in UV), or unfinished aluminum (oxidizes within 18 months). The Camden Duranodic cable eliminates that guesswork. The dark bronze finish is not just aesthetic window dressing; it's a genuine corrosion barrier in salt-air and high-humidity environments. On a recent 40-door hospitality project in Miami, we specified this cable on all exterior entries. Five years in, zero corrosion issues, zero finish touch-ups. Compare that to the 15% replacement rate we saw on unfinished aluminum conduit at a coastal logistics facility. The sealed endcaps are the operational detail most installers miss — they prevent water pooling inside the conduit, which is where corrosion starts. On horizontal roof-level runs, this detail pays for itself in the first maintenance cycle.

Technical Highlights:

• 1/4-inch ID with Molded Endcaps: Sized precisely for 4-conductor 22-gauge (typical lock/strike circuits) or 2-conductor 18-gauge (high-current solenoid runs). Endcaps seal the bore completely, preventing moisture wicking through conductor insulation — the difference between a 5-year cable and a 10-year cable in humid climates.
• Duranodic Finish (Type III Anodize): Harder and more corrosion-resistant than standard Type II anodize. Dark bronze hue masks surface oxidation and fingerprints better than natural aluminum. Survives 1000+ hours of salt-spray testing per ASTM B117 — real durability on coastal and de-icing salt routes.
• Aluminum Body, Non-Conductive: Isolates power runs from door frame ground, reducing EMI coupling into adjacent control circuits. Lighter than steel, easier to route and support on tall mullions without heavy bracket hardware.
• Fixed 18-inch Length: Matches typical surface-mounted lock housings and strike plates on 1.75-inch door frames. Shorter than generic conduit rolls, reducing scrap and labor on per-door installations.
• Universal Compatibility: Works with any 24V DC lock, strike, button, or reader pair. No integration platform lock-in — purely passive wiring infrastructure.

Deployment Considerations:

• Wire gauge is the only sizing rule: 1/4-inch ID is non-negotiable. Do not attempt to force 16-gauge or heavier bundles through the bore; over-stuffing compresses conductor insulation and creates short-circuit risk. If a site needs higher-gauge power, spec the CM-PT250AL for different cable types or run parallel routes.
• On exterior vertical runs, install cable clamps every 18–24 inches to prevent sagging. Aluminum alone will not support a full wire bundle over 36+ inches without support. Heavy 18-gauge pairs are heavier than installers expect; never leave long unsupported spans.
• Duranodic finish is inert and requires no coating maintenance, but surface oxidation (white powdery residue) can develop in very humid or industrial-salt environments. Rinse with mild soap and water annually if the site is near a coast or major de-icing area. This is cosmetic, not structural — the anodize layer remains intact.
• For mortise-cut or frame-embedded installations, the 18-inch fixed length may be too long. Confirm with the door frame drawing before ordering. Camden offers the CM-PT250M (7 inches) for mortise applications and custom lengths on request (lead time + MOQ apply).
• On retrofit projects, existing conduit may not match the Duranodic finish color. Plan for a full 'sweep' replacement of all visible cable runs if appearance consistency matters to the client. Mixing finishes (dark bronze + raw aluminum) looks unfinished.

Specify the CM-PT250AL-DUR-18 for exterior access points, high-humidity facilities, or multi-door systems where finish consistency and corrosion-free operation are priorities. For integrators managing large multi-site deployments, standardizing on this cable eliminates the field variation and callback risk that comes from site-by-site conduit sourcing. See the Camden catalog for mortise variants, custom lengths, and complementary door control hardware.