Electrical Boxes | McMaster-Carr

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Fiberglass-Reinforced Polymer Concrete

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EAR99

DFARS Specialty Metals

NEMA Type

3,406 Products

Electrical Power, Networking, and Controlling

Outlet Boxes

House electrical components such as on-off switches, receptacles, and dimmer knobs

208 products

Electrical Enclosures

House and protect power supplies, control panels, and other electrical equipment

2,212 products

Outlet Box Covers

Enclose wiring for outlets and switches or block off unused components

85 products

Outlet Box Extenders

Add depth to an outlet box when there’s not enough space for components

50 products

Electrical Enclosure Covers

Replace Fibox enclosure covers

98 products

Potting Boxes

Fill with potting compound to protect electronic assemblies from dust, moisture, and vibration

16 products

Raceway and Fittings

Route and guard wiring along surfaces in your facility

79 products

Underground Enclosures

Bury in the ground or in concrete to protect and access utilities such as electric and water lines

9 products

Electrical Enclosure Pedestals

Mount enclosures at a comfortable height to access switches, displays, and other controls

6 products

Electrical Enclosure Panel Mounts

Add a secondary panel that swings to mount more components in your enclosure

2 products

Electrical Enclosure Pole Mounts

Everything you need to secure enclosures to round poles or beams

14 products

Electronics Cabinets

Store and organize servers, computers, and automation controls

15 products

Monitor Enclosures

Shield displays and televisions from impact, dust, and splashing liquids

18 products

Console Enclosures

Build out interfaces with buttons, gauges, and other components to monitor and control machinery

9 products

Electrical Enclosure Floor Stands

Mount enclosures to the floor above hazards such as water

8 products

Electrical Enclosure Positioning Arms

Hang your human-machine interface and swivel it around to save floor space and access equipment

8 products

Electronics Racks

Mount servers, automation controls, and computers in less space than electronics cabinets

9 products

Electrical Enclosure Mounting Channels

Position components inside electrical enclosures without drilling holes, which can leak

9 products

Electronics Rack Equipment Installation Supports

Create temporary ledges to support heavy equipment as you mount it to a rack

4 products

Terminal Blocks

Create tidy rows of wire connections that you can identify, test, and adjust on the spot

47 products

Wall Plates

Cover switches and outlets for a finished look or to close them off when not in use

114 products

Outlet Strips

Plug in multiple devices to power them from a single outlet

113 products

Extension Cords

Extend the reach of power from an outlet

60 products

Power Adapters

NEMA connection adapters, outlet adapters, and outlet splitters

5 products

Disconnect Switches

Make sure equipment stays turned off during inspection and maintenance

125 products

Motor Switches

Turn motors, lighting, and electric heat circuits on and off

17 products

Transfer Switches

Switch to backup power during an outage

7 products

Circuit Board Enclosures

Hold circuit boards to protect them from dust, liquids, or overheating

82 products

Circuit Boards

Create your own circuit board designs by adding components

2 products

Single-Board Computer Enclosures

Protect your Raspberry Pi, Arduino, or other board from dust and impact

9 products

Circuit Breaker Boxes

Hold a series of circuit breakers in line; also known as load centers

49 products

Circuit Breaker Box Filler Plates

Conceal live electrical components in circuit breaker boxes to prevent injury and damage

2 products

Temporary Power Distribution Boxes

Send power to equipment from generators or other sources when electricity is not available

4 products

Battery Chargers

Charge everything from large-cell to cordless tool to household batteries

3 products

Battery Holders

Create an electrical connection between batteries and contacts to power equipment

2 products

Fluid Handling

Thermocouple Connectors

Join thermocouple probes and wire to thermometers and control panels

4 products

Building and Machinery Hardware

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

3 products

Measuring and Inspecting

Load Cell Junction Boxes

Join multiple load cells to combine their weight measurements

2 products

Heating, Ventilation, and Air Conditioning

Temperature-Controlled Outlet Adapters

Automatically turn heating and cooling devices on and off as temperatures rise and fall

3 products

Containers, Storage, and Furniture

Shelves

Use with frames to support and store a variety of items

8 products