The Command Access Technologies ETH8W4540 Electrified Energy Transfer Hinge provides an enclosed pathway for low-voltage electrical wiring from a commercial door frame into the door. This 4-1/2" high x 4" wide, 5-knuckle, standard-weight, full-mortise power-transfer hinge is supplied in 626 / US26D Satin Chrome with a steel-base CH-BB79 chassis. It helps connect compatible electric locksets, door-mounted readers, electric exit trim and monitoring circuits without an exposed cable loop at the hinge edge.

Specification Review: 8-Wire Hinge Installation

Use this 8-conductor electrified transfer hinge as the concealed electrical pathway between a prepared door and frame. Before ordering, match its 4-1/2" x 4 nominal leaf size, electrical conductor arrangement and architectural finish to the project hardware schedule. This listing represents the specific factory finish and size identified by the SKU.

Factory Models in This Listing

• ETH8W4540-652-5SW

Installer and Estimator Checklist

• Mechanical preparation: Verify full-mortise hinge template, leaf width, length, thickness, knuckle style, corner radius, screw locations and door/frame reinforcement. Verify load class and any required listing using the exact SKU.
• Electrical routing: Confirm the factory lead and wire gauges, number of circuits, operating current, voltage drop, and available space for field terminations. Route conductors to protect them during full door swing.
• Compatibility: Identify the electric lockset, exit device, transfer switch or door-monitoring accessories connected through the hinge. Match their terminal requirements to the conductor arrangement; do not substitute a standard-weight or mixed-gauge model by wire count alone.
• Testing: Check hinge alignment, free door movement, wire continuity, insulation condition and device operation with the door in open and closed positions.

Package scope: The selected electrified hinge is supplied as its factory assembly. Locks, access controller, external power supply, wiring beyond the supplied leads and installation labor are not included unless separately specified.

The ETH8W wire configuration contains eight 28 AWG conductors. It is different from the heavy-wire ETH8WH configuration, which contains two 20 AWG power conductors and six 28 AWG conductors. Order this ETH8W4540 model for low-current wiring applications whose actual operating requirements are suitable for its conductor and factory rating.

Hinge-size warning: This ETH8W4540 is the 4-1/2" x 4" commercial hinge configuration. It is not the wider ETH8W4545 4-1/2" x 4-1/2" or taller ETH8W5045 5" x 4-1/2" versions. Check the hinge height, width, screw-hole template, frame mortise and door preparation before ordering. The ETH8W series uses eight 28 AWG conductors, unlike the heavier power-pair arrangement of ETH8WH hinges.

Correct hinge dimensions: Model ETH8W4540 is 4-1/2" high by 4" wide. The physically wider ETH8W4545 (4-1/2" x 4-1/2") and taller ETH8W5045 (5" x 4-1/2") are different hinge preparations and should not be substituted without verifying the door, frame, mounting template and clearance. The 8W configuration uses eight 28-gauge conductors rather than the heavier-gauge power pair of the ETH8WH series.

Features and Benefits

• 8-wire concealed electrical transfer: Eight factory-installed 28 AWG conductors transfer low-voltage power, control or signal wiring between the jamb and door leaf.
• 4-1/2" x 4" commercial size: Designed for openings prepared for a 4-1/2-inch-tall, 4-inch-wide full-mortise butt hinge; verify hinge and frame template before ordering.
• 5-knuckle, standard-weight style: Square-corner full-mortise hinge configuration designated 5SW by the distributor.
• 626 / US26D Satin Chrome: Matte silver, satin chromium-plated finish; the supplier order code uses 652 for the plated-steel version.
• CH-BB79 steel-base chassis: Appropriate for matching the correct steel-base hinge requirements in approved commercial door-hardware schedules.
• Clean appearance: Hidden wiring reduces exposed loops and offers a protected, integrated pathway for approved access-control conductors.
• Low-voltage current rating: Published ETH8W specifications identify a 1.0 amp continuous at 24VDC rating for the designated wire pair; confirm conductor and circuit limitations with the manufacturer's current instructions.
• Non-conductive wire access cap: Manufacturer literature describes a protective access cap intended to help avoid conductor damage at the hinge.
• Four-foot lead availability: Manufacturer literature describes a 4-foot lead at no additional charge; confirm exact factory lead length and connection format when ordering.
• UL-F listed hinge family: Manufacturer literature identifies applicable energy-transfer hinges for listed commercial door applications; verify the exact hinge and completed opening's fire-door approval.
• Manufacturer limited warranty: The Command Access energy-transfer hinge series carries a published three-year limited warranty, subject to current terms.

Product Specifications

Choosing ETH8W vs. ETH8WH

The ETH8W4540 uses eight 28-gauge wires. It is intended for properly sized low-current power and signal applications and should not be assumed suitable for high-current electric latch-retraction motors solely because it has eight conductors. For openings that require a separate heavier-gauge power pair, consider a manufacturer-approved ETH8WH or another appropriate energy-transfer configuration. Always compare the selected hinge's wire gauge, manufacturer current rating, voltage drop and the powered hardware's peak operating requirements before purchasing.

Typical Commercial Applications

• Low-voltage wiring for compatible electrified mortise or cylindrical locksets
• Electronic exit-device trim and approved low-current door hardware
• Door-mounted card readers or related access-control accessories
• Monitoring circuits and other low-voltage signaling functions
• Electrical connections that need concealed routing at commercial steel or wood doors

This hinge is a wiring pathway; it does not contain a lock, latch motor, controller, relay or separate door-position switch. Actual applications must be within the available wire count and current limits.

Selection and Installation Guidance

1. Check hinge size: Measure the existing hinge or approved hardware schedule to confirm 4-1/2" high by 4" wide, not the wider 4-1/2" x 4-1/2" configuration.
2. Confirm chassis and finish: Specify CH-BB79 steel base in 626 satin chrome; the supplier's SKU shows finish code 652.
3. Verify electrical requirements: Confirm eight 28 AWG conductors are sufficient for the connected device's power and signaling needs. Account for continuous and startup draw, wire length, voltage drop and connector rating.
4. Prepare approved wire access: Follow Command Access templates for the hinge-side frame and leaf raceway. Maintain the correct full-mortise hinge preparation and square-corner clearances.
5. Install without wire pinching: Protect conductors during hinge installation and ensure the wiring has appropriate strain relief and insulation.
6. Test operation: Verify continuity, powered-device function, correct door swing, latch engagement and any exit-device or fire-door requirements throughout the full operating range.

Included

One Command Access ETH8W4540 626 CH-BB79 4-1/2" x 4" electrified transfer hinge with an eight-wire 28 AWG concealed harness in 626 Satin Chrome. Check the shipped manufacturer's package for lead length, installation instructions and mounting hardware.

Not Included

Electric lock or panic device, latch-retraction motor, access-control reader or controller, independent power supply, separate monitor switch, door or frame and unrelated accessories. This listing is for the electrified energy-transfer hinge only.