ABB - Installation Products A863MB - ENT Mud Box Mounting Bracket Kit, 2 Positioning Spiders, 1 Metal Strap, For use with ENT Mud Box Assemblies (Mud Box not Included)
ABB - Installation Products

A863MB

UPC: 034481184669


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Installation InstructionsSpecification SheetManufacturer Product Website

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Minimum Qty: 25

Multiplier: 25

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Overview

The ABB ENT Mud Box Mounting Bracket Kit (SKU: A863MB) is a precision-engineered solution for securing ENT (Electrical Non-Metallic Tubing) Mud Box Assemblies in vertical concrete walls. This kit includes two 301 full-hard spring temper stainless steel positioning spiders and one batch-annealed galvanized soft-steel mounting strap, designed to attach directly to rebar for a straight, concrete-tight fit. The spring legs allow flexible placement between concrete forms, while the metal strap ensures stability during concrete pouring. The bracket combination guarantees a secure and rust-resistant mount, compatible with ABB’s ENT Mud Box Assemblies (sold separately). This kit simplifies installation in industrial, commercial, and infrastructure projects, including tunnel form applications. The mounting bracket kit is manufactured from durable materials to meet industry standards for fixture support up to 50 lbs and ceiling fans up to 35 lbs, with threaded brass inserts for #10-32 and #8-32 screw mountings. Ideal for electrical contractors, facility managers, and construction teams, the A863MB kit enhances installation efficiency, reduces setup time, and ensures long-term reliability in demanding environments. The spring legs measure 10.43" in free length and 8.00" when compressed, while the metal strap spans 24.00" with a thickness of 0.0336". The kit is specifically designed for use with 4" square ENT mud box assemblies and is optimized for vertical concrete walls with a thickness of 6"-8". The product is intended for use with 1- and 2-gang mud (outlet) boxes, ensuring compatibility with standard electrical configurations.
  • Includes 2 spring legs (301 full-hard spring temper stainless steel) and 1 galvanized metal strap
  • Designed for vertical concrete walls (6"-8" thickness) with 1- or 2-gang mud box assemblies
  • Spring legs allow flexible placement between concrete forms for precise alignment
  • Metal strap secures mud box assembly to rebar for stability during concrete pouring
  • Threaded brass inserts for #10-32 and #8-32 screw mountings; supports up to 50 lbs

Specifications

Application
Used on vertical concrete walls with a thickness of 6"-8" Used with 1 & 2 gang Mud (outlet) boxes
Finish
Galvanized
Included
2 Positioning Spiders and 1 Metal Strap
Length
24 in
Material
Steel
Mounting Type
Concrete Embedded
Number Of Holes
1
Series
ENT Mud Box Mounting Bracket Kit
Width
1.02 in
Package Dimensions (L x W x H)
0.01 IN x 0.01 IN x 0.01 IN
Package Dimensions (L x W x H)
0.0254 cm x 0.0254 cm x 0.0254 cm
Package Weight (Imperial)
1.290 L
Package Weight (Metric)
0.585 kg
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Frequently Asked Questions

What is the A863MB mounting bracket kit used for?

The A863MB mounting bracket kit is used to secure Carlon ENT mud box assemblies in vertical concrete walls.

Are there any electrical code requirements for installation?

Yes, the product must be installed in accordance with applicable national and local electrical codes.

What concrete wall thickness is compatible with this kit?

The kit is designed for use on vertical concrete walls with a thickness between 6 and 8 inches.

What types of mud boxes are compatible with the kit?

The kit is compatible with 1 and 2 gang mud (outlet) boxes and 4-inch square ENT mud box assemblies.

Are there any electrical code requirements for installation?

Yes, the product must be installed in accordance with applicable national and local electrical codes.

What types of mud boxes are compatible with the kit?

The kit is compatible with 1 and 2 gang mud (outlet) boxes and 4-inch square ENT mud box assemblies.

What concrete wall thickness is compatible with this kit?

The kit is designed for use on vertical concrete walls with a thickness between 6 and 8 inches.

What is the A863MB mounting bracket kit used for?

The A863MB mounting bracket kit is used to secure Carlon ENT mud box assemblies in vertical concrete walls.

What concrete wall thickness is compatible with this kit?

The kit is designed for use on vertical concrete walls with a thickness between 6 and 8 inches.

What is the A863MB mounting bracket kit used for?

The A863MB mounting bracket kit is used to secure Carlon ENT mud box assemblies in vertical concrete walls.

How to Install the Carlon ENT Mounting Bracket (A863MB)

This guide provides step-by-step instructions for assembling and installing the A863MB Carlon ENT Mounting Bracket with a mud box assembly in concrete forms. Installation should be performed by a qualified electrician in accordance with national and local electrical codes.

Estimated time: 20m

Tools needed:

None explicitly required for bracket assembly

Supplies needed:

Carlon ENT Mud Box Assembly, Rebar (optional)

  1. Attach Metal Strap to Mud Box

    Align the key hole cutout in the metal strap with the corresponding feature on the back of the Carlon ENT Mud Box Assembly (sold separately). Ensure it is securely attached as shown in Figure 1 of the documentation.

  2. Install Spring Leg 1

    Attach Spring leg 1 by installing it on top of the metal strap, ensuring proper alignment and seating as depicted in Figure 1 of the documentation.

  3. Install and Rotate Spring Leg 2

    Attach Spring leg 2 to the mud box in the same manner as the metal strap. Then, rotate Spring leg 2 by 90 degrees, utilizing the sloped surfaces on the stops, until the strap rests securely between the stops as shown in Figure 2 of the documentation.

  4. Position Assembly in Concrete Forms

    Compress the spring legs and fit the assembled mud box and bracket between the concrete forms. The optimal working range for the concrete forms is between 6 and 8 inches (Figure 3).

  5. Secure Mud Box to Rebar (Optional)

    Position the mud box to the desired location. Secure the assembly by wrapping the metal strap around the rebar (Figure 4). This step is optional but recommended for best results. Ensure the mud box opening is against the inside surface of the opposite concrete form.

  6. Prepare Mud Box for Concrete

    Prepare the mud box according to job site requirements and best industry practices to prevent concrete ingress during the pouring process.

  7. Complete Wall Construction

    Finish the wall construction following best industry practices after the mud box and bracket assembly are securely in place.

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