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Indoor Electrical Enclosures

Indoor electrical enclosures are a dependable solution for industrial, commercial or residential environments. Indoor electrical junction boxes are made from durable ABS plastic or sturdy aluminum. Designed to house electrical or electronic components, enclosures are available in a range of sizes and styles including surface-mount, instrument enclosure and potting box.

Looking for a weatherproof enclosure for outdoor applications instead? Browse our large selection of outdoor electrical enclosures. To learn more about applications for indoor enclosures and how to choose the best one for you, see our quick guide below.

Applications for Indoor Electrical Enclosures

Depending on their features, indoor electrical enclosures can fill a wide variety of roles in a facility and protect many different kinds of electrical equipment. Some of the most common applications for an indoor electrical enclosure box include:

  • Handheld or desktop electronic equipment
  • Thermostats, security systems and other environmental controls
  • Junction boxes and outlet boxes
  • Automation control units
  • Circuit breakers and switchgear

Naturally, these applications require a variety of different enclosure designs and configurations to achieve the necessary protective qualities. Let’s look at a few of the key considerations.

Choosing an Indoor Enclosure

Polycase offers a wide variety of enclosures designed for indoor use. When you’re selecting an indoor enclosure, keep the following in mind:

  • NEMA Rating/IP Rating: Many of our indoor electrical enclosures offer NEMA or IP-rated performance to protect your devices in harsh environments indoors. Check out our NEMA enclosure guide and IP ratings guide to learn about which ratings offer the right protection for your application.
  • Material: Consider the properties of the enclosure material. Our ABS plastic enclosures are tough and cost-effective, while aluminum enclosures offer natural anti-interference properties. Meanwhile, polycarbonate, coated carbon steel and stainless steel enclosures offer extreme rugged performance and corrosion resistance.
  • Built-In Features: Numerous Polycase enclosures are available with useful built-in features, from wall mount flanges to knockout plates to hinged covers. Many are offered as optional configurations, so you can choose based on the requirements of your application.
  • Accessories: For many applications, enclosure accessories are a must for protecting cable pass-throughs, mounting electrical components and other functions. Polycase offers a full selection of DIN rails, cable glands and other essential accessories to equip our enclosure models. Just click the Accessories tab on each model to see available options.
  • Customization: It’s easy to customize your indoor enclosures through Polycase’s in-house CNC machining and digital printing services. We offer instant quotes, fast shipping and full-service customer support that make it simple to get exactly the enclosures you need at the right price.

We invite you to browse Polycase’s extensive indoor enclosure selection here. For enclosures that can serve in outdoor applications as well, NEMA 4X Enclosure lineup is a great start, or desktop CNC enclosures for models that shine in everyday office use.

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  1. EK-54
    As low as $4.09 per unit
    5.25 x 4.00 x 1.50 in.
    133 x 102 x 38 mm.
    Material: ABS
  2. EK-52
    As low as $4.17 per unit
    4.50 x 3.50 x 2.59 in.
    114 x 89 x 66 mm.
    Material: ABS
  3. DC-34P
    As low as $3.18 per unit
    4.61 x 3.10 x 1.77 in.
    117 x 79 x 45 mm.
    Material: ABS
  4. AL-70P
    As low as $3.99 per unit
    2.00 x 2.00 x 1.25 in.
    51 x 51 x 32 mm.
    Material: Aluminum
  5. SN-24-00
    As low as $3.22 per unit
    2.76 x 1.97 x 1.16 in.
    70 x 50 x 29 mm.
    Material: ABS
  6. AG-43
    As low as $2.36 per unit
    3.00 x 4.00 x 1.38 in.
    76 x 102 x 35 mm.
    Material: ABS
  7. DC-57F
    As low as $5.78 per unit
    8.25 x 5.00 x 1.50 in.
    210 x 127 x 38 mm.
    Material: ABS
  8. XR-46F
    As low as $3.94 per unit
    6.00 x 4.38 x 1.97 in.
    152 x 111 x 50 mm.
    Material: ABS
  9. WA-28
    As low as $8.72 per unit
    4.53 x 3.54 x 3.15 in.
    115 x 90 x 80 mm.
    Material: ABS
  10. WA-22F
    As low as $6.70 per unit
    4.53 x 2.56 x 2.17 in.
    115 x 65 x 55 mm.
    Material: ABS
  11. SN-30-00
    As low as $4.16 per unit
    3.15 x 3.15 x 0.93 in.
    80 x 80 x 24 mm.
    Material: ABS
  12. promo card - ex

    Take your enclosure from plain to powerful

    with Polycase customization services

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  13. LP-31F
    As low as $1.85 per unit
    4.17 x 2.80 x 1.00 in.
    106 x 71 x 25 mm.
    Material: ABS
  14. AL-74P
    As low as $11.58 per unit
    4.75 x 4.75 x 2.33 in.
    121 x 121 x 59 mm.
    Material: Aluminum
  15. JB-35
    As low as $3.81 per unit
    5.00 x 3.80 x 1.50 in.
    127 x 97 x 38 mm.
    Material: ABS
  16. LP-31P
    As low as $1.82 per unit
    4.17 x 2.80 x 1.00 in.
    106 x 71 x 25 mm.
    Material: ABS
  17. EX-52
    As low as $15.09 per unit
    5.08 x 2.70 x 1.39 in.
    129 x 69 x 35 mm.
    Material: Aluminum
  18. DC-96P
    As low as $7.30 per unit
    10.00 x 6.00 x 3.00 in.
    254 x 152 x 76 mm.
    Material: ABS
  19. JB-65
    As low as $5.02 per unit
    6.75 x 6.25 x 1.63 in.
    171 x 159 x 41 mm.
    Material: ABS
  20. KT-35
    As low as $1.38 per unit
    2.50 x 1.63 x 0.80 in.
    64 x 41 x 20 mm.
    Material: ABS
  21. LP-51F
    As low as $2.24 per unit
    4.55 x 3.29 x 1.25 in.
    116 x 84 x 32 mm.
    Material: ABS
  22. KT-70
    As low as $1.86 per unit
    5.50 x 2.00 x 0.80 in.
    140 x 51 x 20 mm.
    Material: ABS
  23. EX-51
    As low as $13.23 per unit
    3.50 x 2.70 x 1.39 in.
    89 x 69 x 35 mm.
    Material: Aluminum
  24. promo card - ex

    Take your enclosure from plain to powerful

    with Polycase customization services

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252 Items

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CNC Machining

Receive your enclosures with the required machining, saving you time and money. Guaranteed accuracy, no scrap, 1-3 week lead times.
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Digital Printing

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