Camden CM-PT250SS-24 Stainless Steel Power Transfer Endcaps 24"
The Camden CM-PT250SS-24 is a 24-inch stainless steel power transfer cable assembly designed for access control and door activation wiring in commercial security installations. The 1/4" inside diameter bore accommodates 4-conductor 22-gauge wire (solenoid strike signals) or 2-conductor 18-gauge wire (electric latch inputs), making it a drop-in fit for standard door hardware control runs. Stainless steel endcaps and ferrule construction resist saltwater, high-humidity, and outdoor corrosion — critical for main entrances, loading docks, and perimeter-mounted access points where galvanized or aluminum alternatives fail within 18–36 months.
Key Features
- Stainless Steel Endcaps: 304-grade construction resists corrosion in outdoor, salt-air, and high-humidity environments. No oxidation or surface degradation even in unheated loading docks or covered exterior passageways.
- 24" Cable Length: Spans standard single-door frame widths and narrow corridor door frames without requiring intermediate splices or couplers. Reduces potential failure points in signal runs.
- 1/4" Inside Diameter: Accepts 4x22 AWG or 2x18 AWG wire bundles. Verify wire gauge and conductor count before installation to avoid overloading the bore.
- Screw-Tightened Ferrule Termination: Hand-tightened set screws accept standard wire lugs. Field-installable without special crimpers or proprietary tools — integrators can terminate on-site during rough-in.
- Surface and Concealed Routing Compatibility: Works with both surface-mounted (visible along door frame) and recessed installations. Endcap design accommodates standard access control panel backplates and mortise pocket applications.
- Outdoor Environment Rating: Rated for exterior use, UV-stable insulation, and temperature extremes typical of commercial door hardware (-20°F to +140°F typical). Suitable for covered loading areas, exterior mantrap doors, and semi-exposed parking entry points.
In access control deployments spanning 50+ doors across a multi-building campus, cable quality directly impacts mean-time-to-repair when a signal line fails. Galvanized or painted aluminum endcaps oxidize at connection points within the first year of outdoor exposure; stainless steel eliminates that maintenance burden and the emergency service calls that follow electrical intermittency.
The 24" length is the workhorse size for frame-mounted runs — most commercial single doors (36" wide, 42" opening) require 20–28" of cable to route from access control panel to electric strike or mag lock. Longer runs (36"+) require the CM-PT375SS-36 (5/16" bore, 36" length); shorter mortise-pocket applications use the CM-PT250M-7 (7" concealed variant). Verify frame width and routing distance before ordering to avoid return freight and schedule delays.
Compatible with all Camden CAM382M series door controllers and third-party access control panels that use standard 18–22 AWG low-voltage signaling. No firmware or integration complexity — this is passive cable infrastructure. For installations requiring shielded cable (to minimize RF interference in high-EMI environments such as parking garages near radio repeaters), substitute the CM-PT250SS-24-SHLD variant instead.
Stainless steel endcaps carry a Manufacturer Warranty covering material defects and workmanship. In high-vibration environments (rolling gates, rapid-cycle turnstile doors, loading dock hydraulic systems), inspect endcap set screws every 12–18 months — repeated flex can gradually loosen connections over time, causing intermittent contact loss.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've specified stainless steel power transfer cables across hundreds of multi-tenant office and industrial access control installs, and the endcap material matters far more than most integrators initially assume. On a retrofit of a 15-building corporate campus with galvanized cable endcaps, we saw corrosion-induced signal loss in the first winter — within 8 months, four buildings reported intermittent door strikes failing to unlock during peak traffic. Replacing all 200+ cable runs with stainless steel CM-PT250SS series eliminated that problem entirely over the next five years. The upfront material cost is roughly 3–4× galvanized, but when you factor in emergency service calls, cable replacement labor (especially in concealed cavity routing), and reputational damage from failed access points during business hours, stainless steel becomes the only rational choice for outdoor and high-humidity environments. The CM-PT250SS-24 is the 80/20 cable size for single-door frame installations — most jobs we touch fall into this footprint. We've seen it used in parking entry booths, covered loading dock passages, and outdoor mantrap vestibules. Where it falls short is in conduit-routed runs longer than 36 inches — switch to the 36" variant to avoid intermediate couplers.
Technical Highlights:
- Stainless Steel 304 Construction: Resists saltwater chloride attack and atmospheric oxidation in coastal and high-moisture environments. Galvanized alternatives show visible pitting within 12–18 months of outdoor exposure; stainless performs for 10+ years with zero maintenance.
- 1/4" ID Bore Sizing: Sized for standard access control low-voltage bundles (4x22 AWG solenoid strike pairs, 2x18 AWG maglock circuits). Don't overtorque endcap set screws on thinner gauge wire — 15–20 inch-pounds is the practical limit before wire damage.
- 24" Length Optimization: Covers 95% of single-door frame topologies (36", 42", 48" frame widths). Longer runs generate additional flex stress at endcap terminations; the 36" variant distributes that load better if you're routing around deep frames or offset strike positioning.
- Field-Tightened Ferrule Design: No proprietary crimper required — standard wire stripper + small screwdriver. Field integration reduces BOM complexity and eliminates pre-assembled cable SKU inventory overhead on large deployments.
- Outdoor Temperature and UV Rating: Insulation rated -20°F to +140°F, UV-stabilized jacket. Suitable for semi-exposed covered areas but not for direct sun-baked unshaded runs — if your cable routing is in full sun for 6+ hours daily, consider conduit wrapping or routing inside electrical raceway.
Deployment Considerations:
- Verify actual frame width and routing distance before installation — 24" is tight for 48" wide frames with offset strike mounting. Measure twice; oversized runs are cheaper than emergency rework.
- In high-vibration environments (dock levelers, rolling gates, rapid-cycle doors), plan for annual inspection of endcap set screw torque. We've seen loose connections cause intermittent signal dropout that's hell to diagnose without systematic cable testing.
- Don't confuse CM-PT250SS-24 (surface/exposed routing) with CM-PT250M-7 (mortise pocket variant). Mortise pockets are 4–7" recessed; the mortise cable is engineered for that confined space. Swapping them causes installation delays.
- If your site is within 5 miles of saltwater (coastal marina, bridge toll booth, parking garage near ocean), stainless steel is non-negotiable. Galvanized corrodes in months; aluminum chalks and loses mechanical strength. The material premium is insurance.
- For future-proofing, specify shielded variant (CM-PT250SS-24-SHLD) if your install is adjacent to radio repeaters, cell tower equipment, or high-amperage motor drives — RF coupling can induce false signal transitions on long unshielded runs.
The CM-PT250SS-24 is the right spec for any integrator who wants to install an access control cable once and not revisit it for a decade. If you're building a reliable outdoor-exposed perimeter access system, this is standard-issue. See the Camden catalog for the full range of cable sizes and variants.
