Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
SQUARE D Panelboard Enclosure: 50 in Lg, 1, 42 Spaces, 400 A Amps, Steel, 20 in Wd - Enclosure Boxes for Square D NQ Series Panels
SQUARE DEnclosure Boxes for Square D NQ Series Panels

SQUARE D Panelboard Enclosure: 50 in Lg, 1, 42 Spaces, 400 A Amps, Steel, 20 in Wd

The Square D Panelboard Enclosure (MPN MH50) is a NEMA 1 steel enclosure for NQ Series panels, measuring 50 in Lg x 20 in Wd with 42 spaces and a 400 A rating. Designed for surface mounting, it is compatible with…

SKU 3G-OTH-722304

Brand
SQUARE D
Item
Panelboard Enclosure: 50 in Lg, 1, 42 Spaces, 400 A Amps, Steel, 20 in Wd
Category
Enclosure Boxes for Square D NQ Series Panels
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

SQUARE D
Manufacturer Part Number
MH50
Type
1, Steel, Surface Mounting
Material
Steel
Wd
20 in
Amps
400 A
Spaces
42
NEMA Rating
1
Mounting Style
Surface
Compatible Three Phase Interior
4HGZ6
Compatible Single Phase Interior
4HGY3
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

SQUARE D Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Square D Panelboard Enclosure (MPN MH50) is a NEMA 1 steel enclosure for NQ Series panels, measuring 50 in Lg x 20 in Wd with 42 spaces and a 400 A rating. Designed for surface mounting, it is compatible with three-phase interior 4HGZ6 and single-phase interior 4HGY3.

Frequently Asked Questions

What is the Square D Panelboard Enclosure MH50 used for?

The Square D Panelboard Enclosure MH50 is a NEMA 1 steel enclosure for NQ Series panels, used to house electrical distribution components in commercial and industrial settings. It supports surface mounting, accommodates 42 spaces, and is rated for 400 A, making it suitable for branch circuit protection and power distribution.

What are the specifications of the Square D Panelboard Enclosure MH50?

The Square D Panelboard Enclosure MH50 measures 50 in Lg x 20 in Wd, is made of steel with a NEMA 1 rating, and supports surface mounting. It provides 42 spaces and a 400 A rating, compatible with three-phase interior 4HGZ6 and single-phase interior 4HGY3 for NQ Series panels.

Where to buy the Square D Panelboard Enclosure MH50 worldwide?

3G Electric supplies the Square D Panelboard Enclosure MH50 to customers worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source and deliver this NEMA 1 steel enclosure for NQ Series panels, ensuring it meets your project requirements for surface mounting and 400 A capacity.

How to install the Square D Panelboard Enclosure MH50?

Install the Square D Panelboard Enclosure MH50 by surface-mounting it on a wall or structure using appropriate hardware. Ensure the mounting surface is level and rated for the enclosure's weight. Follow Square D's guidelines for wiring and interior installation, and verify compatibility with the single-phase interior 4HGY3 or three-phase interior 4HGZ6.

Used in

Common applications for SQUARE D
Commercial building electrical panels — Square D QO series plug-in circuit breakers for branch circuit protection
Industrial motor control centers — Square D QOB series bolt-on breakers in NQOD panelboards
Heating equipment installations — Square D QOU series unit-mount breakers for overcurrent protection
Outdoor electrical distribution — Square D L-Frame enclosures housing LAL/LHL breakers for 400 A service
Indoor facility power distribution — Square D Q-Frame enclosures with QBL/QDL breakers for 225 A circuits
Retrofit and replacement in existing Square D load centers — QO series breakers for 120/240V AC systems

SQUARE D Products

3G Electric supplies SQUARE D enclosure boxes for square d nq series panels. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

More from SQUARE D

View all SQUARE D parts →
Panelboard Enclosure: 26 in Lg, 1, 100 A Amps, Steel, 4HGW8/4HGW9, 4HGY4/4HGY5, 20 in Wd (MPN MH26). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: 4HGW8; NEMA Rating: 1; Compatible Three Phase Interior: 4HGY4.
SQUARE D
Panelboard Enclosure: 26 in Lg, 1, 100 A Amps, Steel, 4HGW8/4HGW9, 4HGY4/4HGY5, 20 in Wd (MPN MH26). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: 4HGW8; NEMA Rating: 1; Compatible Three Phase Interior: 4HGY4.
Panelboard Enclosure: 32 in Lg, 1, 30 Spaces, 225 A Amps, Steel, 4HGX1/4HGX2/4HGX3/4HGX4, 20 in Wd (MPN MH32). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: 4HGX4; NEMA Rating: 1; Compatible Three Phase Interior: 4HGY8.
SQUARE D
Panelboard Enclosure: 32 in Lg, 1, 30 Spaces, 225 A Amps, Steel, 4HGX1/4HGX2/4HGX3/4HGX4, 20 in Wd (MPN MH32). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: 4HGX4; NEMA Rating: 1; Compatible Three Phase Interior: 4HGY8.
Panelboard Enclosure: 38 in Lg, 1, 42 Spaces, 225 A Amps, Steel, 4HGX5/4HGX6, 20 in Wd (MPN MH38). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: 4HGX5; NEMA Rating: 1; Compatible Three Phase Interior: 4HGZ2.
SQUARE D
Panelboard Enclosure: 38 in Lg, 1, 42 Spaces, 225 A Amps, Steel, 4HGX5/4HGX6, 20 in Wd (MPN MH38). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: 4HGX5; NEMA Rating: 1; Compatible Three Phase Interior: 4HGZ2.
Panelboard Enclosure: 62 in Lg, 1, 54 Spaces, 600 A Amps, Steel, 4HGX7/4HGX8/4HGX9/4HGY1/4HGY2/4HGY3 (MPN MH62). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: 4HGY3; NEMA Rating: 1; Compatible Three Phase Interior: 4HGZ6.
SQUARE D
Panelboard Enclosure: 62 in Lg, 1, 54 Spaces, 600 A Amps, Steel, 4HGX7/4HGX8/4HGX9/4HGY1/4HGY2/4HGY3 (MPN MH62). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: 4HGY3; NEMA Rating: 1; Compatible Three Phase Interior: 4HGZ6.
Panelboard Enclosure: 44 in Lg, 1, 54 Spaces, 225 A Amps, Steel, 4HGX1/4HGX2/4HGX3/4HGX4, 20 in Wd (MPN MH44). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: 4HGX1; NEMA Rating: 1; Compatible Three Phase Interior: 3TZ03.
SQUARE D
Panelboard Enclosure: 44 in Lg, 1, 54 Spaces, 225 A Amps, Steel, 4HGX1/4HGX2/4HGX3/4HGX4, 20 in Wd (MPN MH44). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: 4HGX1; NEMA Rating: 1; Compatible Three Phase Interior: 3TZ03.
Panelboard Enclosure: 56 in Lg, 1, 42 Spaces, 600 A Amps, Steel, 22P074/3TZ08/3TZ09, 20 in Wd (MPN MH56). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: NQOD54L225CU; NEMA Rating: 1; Compatible Three Phase Interior: 3TZ09.
SQUARE D
Panelboard Enclosure: 56 in Lg, 1, 42 Spaces, 600 A Amps, Steel, 22P074/3TZ08/3TZ09, 20 in Wd (MPN MH56). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: NQOD54L225CU; NEMA Rating: 1; Compatible Three Phase Interior: 3TZ09.
Panelboard Enclosure: 68 in Lg, 1, 42 Spaces, 400 A Amps, Steel, 1D917, 22P073/22P074/22P075 (MPN MH68). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: 1D917; NEMA Rating: 1; Compatible Three Phase Interior: 22P075.
SQUARE D
Panelboard Enclosure: 68 in Lg, 1, 42 Spaces, 400 A Amps, Steel, 1D917, 22P073/22P074/22P075 (MPN MH68). Key specifications — Mounting Style: Surface; Material: Steel; Compatible Single Phase Interior: 1D917; NEMA Rating: 1; Compatible Three Phase Interior: 22P075.