NSI Industries 4156-DC - Mighty-Merge® Transition Fittings, 1/2" EMT to Duplex AC/MC Coupling
NSI Industries

4156-DC

UPC: 781747941565


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Minimum Qty: 10

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Overview

The NSi Industries Mighty-Merge® Transition Fitting (SKU 4156-DC) is a UL-listed (File No. E 1383) and CSA-certified (File No. 2884) coupling designed to connect 1/2" EMT (Electrical Metallic Tubing) to Duplex AC/MC (Armored Cable/Mineral-Insulated Cable) conduits. This one-piece fitting features a formed steel body with a carefully rounded bushing to prevent cable damage during installation. The armor gripping saddle remains open for easy cable insertion, while the TITE-BITE® connector design secures flexible metal cable with a single screw, eliminating the need for multiple fasteners. Engineered for reliability in industrial, commercial, and residential applications, the 4156-DC ensures a secure, watertight connection that meets NEC standards. Its malleable iron construction provides durability in demanding environments, making it ideal for grounding applications under NEC 350-5. The fitting accommodates a cable opening range of 0.250" to 0.656", ensuring compatibility with standard Duplex AC/MC cables. Trust NSi Industries for a precision-engineered transition fitting that delivers long-lasting performance and compliance with industry regulations.
  • UL-listed (File No. E 1383) and CSA-certified (File No. 2884) for compliance with electrical codes
  • One-piece formed steel body with rounded bushing to protect cables during installation
  • TITE-BITE® connector secures flexible metal cable with a single screw for quick, tool-free installation
  • Armor gripping saddle stays open for easy cable insertion and alignment
  • Malleable iron construction ensures durability in industrial and commercial environments
  • Cable opening range: 0.250" to 0.656" for compatibility with standard Duplex AC/MC cables
  • Meets NEC 350-5 requirements for grounding applications

Specifications

Application
The 4156-DC is used to securely join 1/2" EMT to two 14/2 to 10/3 (.43" to .61" Diameter) AC/MC/MCI-A/HCF/HCFMCI-A or 3/8" flexible metal conduit. These fittings provide a huge labor savings, compared to the traditional junction box or fitting assembly installation. When using AC/MC/FMC cable simply remove the armor and expose the conductors to the desired length needed to reach the device box or enclosure. The inspection holes will provide a visual end stop for the cable or flex conduit. The use of anti short bushings is recommended. Tighten the steel screws for the 1/2" EMT conduit. Patented.
Connection Type
Coupling
Material
Metal
Material Quality
Zinc Die Cast
Series
Mighty-Merge
Size
1/2" EMT to Duplex AC/MC
Special Features
Set Screw type transition fitting ideal for commercial and institutional facilities.
Standard
cETLus
Trade Size
0.5 in
Type
Coupling
Package Weight (Imperial)
0.273 L
Package Weight (Metric)
0.124 kg
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Frequently Asked Questions

What is the purpose of the 4156-DC fitting?

The 4156-DC is a set screw type transition fitting used to securely join 1/2" EMT to two 14/2 to 10/3 AC/MC/MCI-A/HCF/HCFMCI-A or 3/8" flexible metal conduit.

What types of conduit does the 4156-DC fit with?

It fits with 1/2" EMT and two 14/2 to 10/3 AC/MC/MCI-A/HCF/HCFMCI-A or 3/8" flexible metal conduit.

What materials are used in the 4156-DC fitting?

The 4156-DC fitting is made of zinc die cast material.

What is the recommended installation practice?

When using AC/MC/FMC cable, remove the armor and expose the conductors to the desired length, using the inspection holes as a visual end stop.

What certifications does the 4156-DC have?

The 4156-DC is CSA certified and UL cETLus listed.

What are the dimensions of the 4156-DC fitting?

The dimensions are: A = 2.99 inches, B = 1.30 inches, C = 1.98 inches.

Are anti-short bushings necessary?

Yes, the use of anti-short bushings is recommended during installation.

What is the patent status of the 4156-DC?

The 4156-DC has several patents, including D581,877 and 7,402,752.

What is the standard package quantity for the 4156-DC?

The standard package quantity for the 4156-DC is 40 units.

What is the UPC number for the 4156-DC?

The UPC number for the 4156-DC is 78174794156.

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