Primary Cable Termination Kit

The Primary Cable Termination Kit is a pre‑assembled collection of materials and components specifically designed for terminating the ends of L‑824 primary AGL cables. It provides everything needed to prepare the cable end, attach termination hardware, restore insulation, and create a waterproof seal, ensuring a safe and reliable connection to equipment such as Constant Current Regulators (CCRs), distribution panels, L‑823 connectors, or junction boxes.

Typical contents of a primary cable termination kit include:

• Conductor Terminals (Lugs): Copper or tinned‑copper compression lugs sized to match the conductor (6 AWG to 2 AWG) and the equipment stud size.
• Heat‑Shrink Tubing: Dual‑wall adhesive‑lined tubing for insulating the conductor connection and restoring the cable's insulation profile.
• Screen Connector: A clamp or lug for terminating the metallic screen (shield) to earth or to the equipment's earth terminal.
• Insulating Tape: Self‑amalgamating or high‑voltage tape for additional insulation and stress relief at the termination point.
• Sealing Compound: Mastic or resin for waterproofing the cable entry into the equipment.
• Cleaning Materials: Wipes and abrasive pads for preparing the conductor and screen surfaces.
• Installation Instructions: Step‑by‑step guide with torque and crimp specifications.

The kit is designed for use with L‑824 shielded, XLPE‑insulated primary cable and is compatible with various equipment termination requirements. It ensures that the termination meets the electrical and mechanical performance requirements of the 5kV series circuit, including insulation integrity, screen continuity, and moisture resistance.

The termination kit exists because the point where a primary AGL cable connects to a CCR, distribution panel, or junction box is one of the highest-risk points in the entire series circuit — it's where the cable's continuous insulation and shielding are interrupted to make an actual electrical connection, and if that termination isn't done correctly, it becomes the weak point most likely to fail under the circuit's 5kV operating stress or let in moisture over time.

By bundling everything needed — lugs sized to the conductor, shrink tubing to restore insulation, a screen connector for earth continuity, and sealing compound for waterproofing — into one kit with clear instructions, it ensures every termination on the airfield is built to the same standard regardless of which crew installs it, rather than depending on individual technicians sourcing and matching compatible components correctly on their own.

The primary cable termination kit is used throughout the airfield wherever primary cable ends need to be terminated, including:

• CCR Output Terminals: Terminating the primary cables at the output of the Constant Current Regulator (CCR) for connection to the field distribution panel or series loop.
• L‑823 Connector Installation: Preparing the cable end for insertion into the L‑823 plug or receptacle assembly, ensuring proper contact and sealing.
• Junction Boxes and Splice Enclosures: Terminating cables inside junction boxes for connection to terminal blocks, bus bars, or other equipment.
• Distribution Panels: Connecting primary cables to the distribution panel's bus bars or circuit breakers.
• Test Points and Disconnect Panels: Terminating cables at test points to allow for circuit isolation and testing.
• Transition Points: Preparing cable ends for transition from underground to elevated installations, or from cable to equipment.

The kit is available for cable sizes from 6 AWG to 2 AWG (6mm² to 35mm²) and includes components suitable for copper conductors. It is rated for continuous operation at the full primary current (6.6A or 20A) and voltage (5kV).

Terminations are made inside the enclosure they serve — a CCR output cabinet, a junction box, a distribution panel, or the base of an L-823 plug/receptacle — rather than in open ground, so the finished termination sits in a controlled, accessible space rather than a buried joint. Cable entering the enclosure is glanded and strain-relieved at the enclosure wall before the kit's own stress-cone or crimp termination is made, keeping the cable's outer sheath integrity intact right up to the termination point. Where the termination feeds a distribution panel or CCR, sufficient cable slack is left inside the enclosure to allow the termination to be remade once or twice over its service life without pulling additional cable from the duct run.

The primary cable termination kit provides all necessary components to create a reliable, waterproof, and electrically sound termination. The typical installation process involves:

• Cable Preparation: Stripping the outer jacket to the required length, removing the insulation screen and XLPE insulation to expose the conductor, and preparing the metallic screen for termination.
• Screen Termination: Connecting the screen to the earth terminal using the screen connector (e.g., a clamp or lug). The screen must be bonded to earth at the termination point to ensure EMI protection and safety.
• Conductor Termination: Attaching the compression lug to the exposed conductor using a hydraulic crimping tool. The lug is then bolted to the equipment's stud or terminal.
• Insulation Restoration: Applying self‑amalgamating tape over the conductor connection and then covering with heat‑shrink tubing. The tubing is heated to shrink and seal, providing electrical insulation and moisture protection.
• Stress Relief and Sealing: Applying additional sealing compound (mastic or resin) at the cable entry into the equipment to prevent moisture ingress and provide mechanical strain relief.
• Testing: After installation, the termination is tested for insulation resistance (5000V megger) and continuity to verify the integrity of the connection.

The kit is designed for use with standard tools (cable strippers, crimping tools, heat gun, torque wrench) and follows the manufacturer's instructions for proper installation. The materials are selected to match the cable's XLPE insulation and 5kV rating, ensuring compatibility and long‑term reliability.

The termination kit carries no control logic of its own — it is the fixed interface where the L-824 primary cable's conductor and screen are bonded to a piece of equipment (a CCR output, a transformer, or a junction) that is itself part of the loop the ALCMS and CCR monitor. Its job is to make that boundary electrically transparent: a properly torqued lug and a correctly bonded screen should add no meaningful resistance to the loop and no leakage path to earth, so the equipment sees the same fixed current the CCR is regulating. A degraded termination — a loose lug, a compromised heat-shrink seal letting in moisture — behaves exactly like any other loop impedance fault: the CCR sees a rising voltage at constant current and reports it to the ALCMS as a loop fault, with no indication that the cause is a termination rather than a cable, splice, or fixture fault elsewhere on the same loop. This is why the kit's installation is verified immediately with an insulation-resistance (megger) test and a continuity check, rather than being left for the ALCMS to catch later.

A termination kit is supplied as a set of pre-formed or field-assembled components: a compression or crimp lug to terminate the conductor at the equipment connection point, stress-relief cones or mastic/grading tape to control the electric field where the cable's shield is cut back and terminated, and layers of insulating tape, heat-shrink tubing, or a moulded boot to rebuild the insulation over the exposed conductor and lug. A separate ground braid or tail lead restores continuity from the cable shield to the equipment's earthing point, and a weatherproof outer sleeve or heat-shrink jacket seals the finished termination against moisture where it is installed outdoors or in a below-grade enclosure. Kits are typically sized to match the specific cable gauge and voltage class, with the components pre-cut or moulded to length so the termination can be completed in the field without specialised tooling beyond a crimp tool and a heat gun.