Chapter 8547 — Customs Tariff Headings

Autolite NGK4123 Ceramic Spark Insulator

This ceramic insulator is a component designed for spark plugs used in natural gas-fueled drilling rig engines. It is an insulating fitting wholly of ceramic material, with only minor metal components incorporated during moulding for assembly purposes, which aligns with the tariff item's scope.

Beru GN12 Ceramic Insulating Fitting

This precision ceramic insulator is designed for spark plugs in cogeneration natural gas engines. It features multi-layer ceramic construction with an integrated metal thread insert, making it an insulating fitting of ceramics with minor metal components for assembly, fitting the tariff item.

Bosch FR8NGY Ceramic Spark Insulator Core

This ceramic core insulator is for spark plugs in natural gas reciprocating engines at power plants. It has a thin-wall design with a threaded metal socket for assembly, qualifying as an insulating fitting of ceramics with minor metal components, under this tariff item.

Ceramic Breaker Base Insulator

This ceramic base insulator is for vacuum circuit breakers, supporting live components while isolating them from the enclosure. It is molded with stainless steel inserts for mounting bolts, making it an insulating fitting of ceramics with minor metal components, fitting the tariff item.

Ceramic Busbar Support Insulator

This ceramic standoff insulator supports busbars in electrical distribution panels, with captive metal bolts molded during production. It is rated for continuous operation at 1000A/15kV, qualifying as an insulating fitting of ceramics with minor metal components, under this tariff item.

Ceramic Bushing Insulator

This high-voltage ceramic bushing insulator is used in electrical transformers and switchgear, made entirely of insulating ceramic material with minor metal threaded inserts for assembly. It provides electrical insulation and fits the tariff item's definition of insulating fittings of ceramics.

Ceramic Cable Terminal Bushing

These ceramic bushings are for cable terminations in electrical panels and switchboards, lined with insulating material and featuring minor metal threading for assembly. They provide insulation for high-current connections up to 35kV, qualifying as insulating fittings of ceramics under this tariff item.

Ceramic Capacitor Mounting Insulator

This ceramic mounting base is for high-voltage power capacitors in substations, featuring threaded metal inserts for secure assembly. It ensures electrical isolation from mounting structures, making it an insulating fitting of ceramics with minor metal components, fitting the tariff item.

Ceramic CT Mounting Insulator

This ceramic mounting insulator is for current transformers in metering applications, featuring precision-molded metal studs. It maintains electrical isolation in high-accuracy revenue metering, qualifying as an insulating fitting of ceramics with minor metal components, under this tariff item.

Ceramic Disconnect Switch Insulator

This ceramic base insulator is for high-voltage disconnect switches, supporting live parts while isolating from the operating mechanism. It has precision metal inserts for pin mounting, making it an insulating fitting of ceramics with minor metal components, fitting the tariff item.

Ceramic Fuse Support Insulator

This ceramic support insulator is for expulsion fuses in distribution cutouts, with bronze contact clips molded during firing. It is rated 15-38kV for overhead protection, qualifying as an insulating fitting of ceramics with minor metal components, under this tariff item.

Ceramic Generator Stator Wedge

Ceramic generator stator wedges are insulating fittings used to secure stator windings in large power generators. They feature metal locating pins molded in place to aid assembly while maintaining full electrical insulation. These wedges are classified under tariff item 8547.10.00 as insulating fittings of ceramics, critical for vibration resistance and insulation under high thermal cycling.

Ceramic Motor End Cap Insulator

Ceramic motor end cap insulators are insulating fittings designed for electric motors, preventing electrical contact between rotor and stator windings. They feature molded-in metal sockets for bolt assembly while preserving full insulation properties. These fittings fall under tariff item 8547.10.00 as ceramic insulating fittings for electrical machinery.

Ceramic Panelboard Spout

Ceramic panelboard spouts are insulating fittings used in circuit breakers within industrial panelboards, guiding conductors while providing phase isolation. They include minor metal threading for secure mounting, which does not compromise their insulating function. These spouts are classified under tariff item 8547.10.00 as ceramic insulating fittings for electrical equipment.

Ceramic Phase Barrier Insulator

Ceramic phase barrier insulators are used in medium-voltage switchgear to separate electrical phases, molded with minor metal fixing points for installation. They are essential for arc flash prevention and phase-to-phase insulation. These barriers fall under tariff item 8547.10.00 as ceramic insulating fittings for electrical equipment.

Ceramic Recloser Insulator

Ceramic recloser insulators are post insulators for automatic circuit reclosers on distribution poles, featuring stainless steel base flanges for mounting. They provide insulation and mechanical support, helping to restore service automatically after temporary faults. These insulators are classified under tariff item 8547.10.00 as ceramic insulating fittings for electrical equipment.

Ceramic Surge Arrester Housing

Ceramic surge arrester housings are high-strength ceramic enclosures for metal oxide varistor surge arresters, incorporating metal flange connections for assembly. They provide insulation and weatherproofing for lightning protection devices. These housings are classified under tariff item 8547.10.00 as ceramic insulating fittings for electrical equipment.

Ceramic Transformer Spacer

Ceramic transformer spacers are precision components that maintain winding separation in distribution transformers, with embedded metal pins for positioning. They are critical for preventing short circuits under oil immersion. These spacers fall under tariff item 8547.10.00 as ceramic insulating fittings for electrical equipment.

Champion RC12NGY Industrial Ceramic Insulator

This ceramic insulator series is for spark plugs in stationary natural gas engines used in power generation and oilfield equipment. With 95% alumina content and a design for high dielectric strength, it is an insulating fitting of ceramics with minor metal parts, fitting the tariff item.

Denso XNG27 Industrial Ceramic Insulator

This ceramic insulator series is optimized for spark plugs in large-bore natural gas engines in pipeline compressor stations. It provides 30kV dielectric strength with a corrosion-resistant glaze, qualifying as an insulating fitting of ceramics with minor metal components, under this tariff item.

Motorcraft SP-527NG Ceramic Core

This ceramic core is for spark plugs in natural gas standby generators and industrial engines. It uses a high-purity porcelain formulation to resist carbon tracking, making it an insulating fitting of ceramics with minor metal components, fitting the tariff item.

NGK CER-GY12 Ceramic Spark Plug Insulator

This high-alumina ceramic insulator is designed for spark plugs in natural gas-fueled stationary internal combustion engines, such as gas generators and compressors. It provides electrical insulation between the central electrode and the shell, qualifying as an insulating fitting of ceramics with minor metal components, under this tariff item.

Plastic Bushings for Electrical Panels

Plastic bushings for electrical panels are insulating fittings inserted into knockout holes to protect wires from abrasion. Made wholly of plastic, they may include minor metal inserts for retention, which is permitted under this tariff item.

Plastic Cable Entry Seals

Plastic cable entry seals are insulating multi-cable grommets used for panel penetration, providing both insulation and sealing. They are wholly plastic with minor metal frames for mounting, qualifying as insulating fittings of plastics.

Plastic Cable Glands

Plastic cable glands are insulating fittings used to secure and seal cables entering enclosures. They are made wholly of plastics with minor metal threaded components for assembly, fitting the definition of insulating fittings of plastics.

Plastic Conduit Connectors

Plastic conduit connectors join sections of electrical conduit tubing while providing insulation. Made of insulating plastics with minor metal couplings embedded for assembly, they fall under this tariff item for insulating fittings of plastics.

Plastic Electrical Enclosure Plugs

Plastic electrical enclosure plugs seal unused knockout holes in electrical boxes, providing insulation and weatherproofing. They have plastic bodies with minor metal threads for secure fitting, qualifying as insulating fittings of plastics.

Plastic Insulating Clamps

Plastic insulating clamps secure busbars or wires while providing electrical insulation in switchgear. They consist of plastic bodies with minor metal tension screws, fitting the definition of insulating fittings of plastics.

Plastic Insulating End Caps

Plastic insulating end caps cover exposed wire terminations on electrical equipment for safety. They are wholly plastic with minor metal clips incorporated during molding, qualifying as insulating fittings of plastics.

Plastic Insulating Spacers

Plastic insulating spacers maintain separation between electrical components to prevent short circuits in machines. They are wholly plastic with minor metal screws for positioning, fitting the definition of insulating fittings of plastics.

Plastic Junction Box Inserts

Plastic junction box inserts organize and insulate wire connections within electrical boxes. Made of insulating plastic with minor metal partitions molded in, they fall under this tariff item for insulating fittings of plastics.

Plastic Motor Terminal Covers

Plastic motor terminal covers insulate connection points on electric motors from accidental contact. Made of insulating plastic with minor metal fasteners molded in, they qualify as insulating fittings of plastics.

Plastic PCB Standoffs

Plastic PCB standoffs provide insulating spacing between printed circuit boards and chassis. They are plastic spacers with minor metal threads for mounting, fitting the definition of insulating fittings of plastics.

Plastic Strain Relief Connectors

Plastic strain relief connectors are insulating fittings that grip cables to prevent pull-out from electrical devices. They are composed of plastic bodies with minor metal clamps molded during production, qualifying as insulating fittings of plastics.

Plastic Switch Mounting Insulators

Plastic switch mounting insulators provide electrical isolation when installing switches in panels. They have plastic construction with minor metal screws for attachment, fitting the definition of insulating fittings of plastics.

Plastic Terminal Blocks

Plastic terminal blocks are insulating fittings for connecting multiple electrical wires in control panels and machines. They are constructed entirely of insulating plastic with small metal screws or sockets molded in for wire clamping, qualifying as insulating fittings of plastics.

Plastic Wire Grommets

Plastic wire grommets are insulating fittings snapped into panels to protect wires from sharp edges. They are entirely plastic with occasional minor metal barbs for retention, fitting the definition of insulating fittings of plastics.

Appliance Insulating Spacer Blocks

Appliance insulating spacer blocks are phenolic or plastic components that electrically isolate parts within household appliances. They incorporate minor metal threaded inserts to facilitate bolted assembly, which is permitted under this tariff item. These fittings are wholly of insulating material apart from those minor metal components, making them classifiable as insulating fittings for electrical machines.

Bakelite Insulating Switchboard Fittings

Mounting fittings for circuit breakers in switchboards, made of bakelite (phenolic) with threaded steel sockets for secure insulated assembly. These fittings are wholly of insulating material apart from minor metal components incorporated during moulding solely for assembly purposes, qualifying under tariff item 8547.90.00.

Brass Insulated Conduit Compression Connector

Compression-type connectors for liquid-tight insulated conduits, with a brass body and Santoprene thermoplastic lining for secure, insulated wire protection. These are joints for electrical conduit tubing of base metal lined with insulating material, falling under tariff item 8547.90.00.

Ceramic-Filled Polymer Insulating Standoffs

Standoff insulators for mounting electrical components, made of polymer base with ceramic filler and minor brass threaded inserts, used in high-voltage appliances. These are insulating fittings wholly of insulating material apart from minor metal components for assembly, classified under tariff item 8547.90.00.

Electrical Insulating End Caps for Conduit

Electrical insulating end caps for conduit are plastic components that seal and insulate the terminations of electrical conduit tubing. They are molded with minor metal parts for attachment to the conduit, which is acceptable under this heading. These caps serve as insulating fittings for electrical conduit systems, wholly of insulating material apart from the minor metal components.

Electrical Insulating Potting Cups

Electrical insulating potting cups are plastic containers used to encase and insulate electrical components before encapsulation. They include minor metal pins for positioning components during the molding or assembly process. These cups are insulating fittings wholly of insulating material apart from the minor metal elements, qualifying under this tariff item.

Electrical Terminal Insulating Caps

Electrical terminal insulating caps are rubber or plastic covers that protect exposed electrical terminals on appliances and equipment. They feature minor metal threaded components molded in for attachment during assembly. These caps are insulating fittings made wholly of insulating material except for the minor metal parts, classifiable under this tariff item.

EMT Thin-Wall Steel Conduit Tubing 1/2 Inch

EMT thin-wall steel conduit tubing is galvanized steel electrical conduit with thin walls, lined with PVC insulating material for protecting electrical wiring. This base metal conduit is lined with insulating material, making it classifiable under this tariff item as electrical conduit tubing. It is used in residential and commercial building wiring installations.

Epoxy Insulated Motor Terminal Bushings

Bushings for electric motor terminals made of phenolic resin insulation with minor threaded metal inserts for mounting, preventing electrical arcing in appliances. These are insulating fittings wholly of insulating material apart from minor metal components, falling under tariff item 8547.90.00.

Flexible Liquidtight Steel Conduit Tubing 1 Inch

Flexible liquidtight steel conduit tubing is interlocked galvanized steel flexible conduit with a PVC outer jacket and insulating liner, designed for wet locations and vibration-prone areas. This base metal conduit is lined with insulating material, qualifying under this tariff item. It provides protection and insulation for electrical wiring in demanding environments.

Galvanized EMT Conduit 4 Inch Trade Size

Galvanized EMT conduit of 4-inch trade size is large diameter electrical metallic tubing lined with insulating material for main feeder circuits in commercial buildings. This base metal conduit is lined with insulating material, making it classifiable under this tariff item. It provides mechanical protection and electrical insulation for large-scale wiring systems.

Galvanized Steel Insulated Conduit Joint Coupling

Couplings for joining insulated electrical conduits, featuring a steel body lined with polyethylene insulator for secure, insulated connections in equipment wiring. These are joints for electrical conduit tubing of base metal lined with insulating material, classified under tariff item 8547.90.00.

Hot-Dip Galvanized Steel Conduit IMC 1-1/2 Inch

Hot-dip galvanized steel conduit IMC of 1-1/2 inch is intermediate metal conduit tubing with an insulating liner for outdoor and underground applications. This base metal conduit is lined with insulating material, qualifying under this tariff item. It offers corrosion resistance and electrical insulation for harsh environments.

IMC Intermediate Metal Conduit Tubing 1-1/4 Inch

IMC intermediate metal conduit tubing of 1-1/4 inch is galvanized steel conduit with an insulating liner, lighter than rigid but heavier than EMT for commercial installations. This base metal conduit is lined with insulating material, making it classifiable under this tariff item. It provides a balance of strength and weight for electrical wiring systems.

Insulating Bushing for Motors

Insulating bushings for motors are nylon or ceramic components that insulate shaft connections in electric motors and appliances. They are made wholly of insulating material with minor metal sockets for secure assembly during manufacturing. These bushings qualify as insulating fittings for electrical machines under this tariff item.

Insulating Cable Clips for Appliances

Insulating cable clips for appliances are plastic clips that secure and insulate electrical cables within appliance chassis. They include minor metal screws molded in for mounting assembly. These clips are insulating fittings made wholly of insulating material apart from the minor metal components, classifiable under this tariff item.

Insulating Strain Relief Bushings

Insulating strain relief bushings are plastic components that provide strain relief and insulation for electrical cords entering appliance housings. They include minor metal clamps molded in for secure assembly. These bushings are insulating fittings wholly of insulating material apart from the minor metal parts, qualifying under this tariff item.

Liquid Crystal Polymer Insulating Feed-Throughs

High-temperature feed-through insulators of liquid crystal polymer (LCP) with stainless steel contacts for electronics in motors. These are insulating fittings wholly of insulating material apart from minor metal components, designed for electrical equipment, falling under tariff item 8547.90.00.

Liquidtight Flexible Nonmetallic Conduit Adapter Tubing

Liquidtight flexible nonmetallic conduit adapter tubing consists of short steel base sections lined with a heavy-duty PVC insulation layer, used to connect liquidtight conduit systems. It qualifies under tariff item 8547.90.00 as electrical conduit tubing of base metal lined with insulating material, a classification that covers fittings and tubing for protecting electrical wiring.

Motor Terminal Box Insulating Inserts

Motor terminal box insulating inserts are plastic components that insulate terminal connections inside electric motor junction boxes. They feature minor metal sockets for wire termination assembly. These inserts are insulating fittings for electrical machines, wholly of insulating material apart from the minor metal components, classifiable under this tariff item.

NEMA 3R PVC-Coated EMT Conduit 1-1/2 Inch

NEMA 3R PVC-coated electrical metallic tubing (EMT) is a steel conduit with an external PVC coating and an internal insulating liner, rated for rainproof outdoor applications. It falls under tariff item 8547.90.00 as electrical conduit tubing of base metal lined with insulating material, protecting wires from moisture and corrosion.

Nylon-Lined Steel Electrical Conduit Elbow

90-degree elbow fittings for electrical conduit, made of steel tube lined with nylon insulator for directional wiring runs in equipment panels. These are joints for electrical conduit tubing of base metal lined with insulating material, classified under tariff item 8547.90.00.