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SQUARE D Panelboard Enclosure: 56 in Lg, 1, 42 Spaces, 600 A Amps, Steel, 22P074/3TZ08/3TZ09 - Enclosure Boxes for Square D NQ Series Panels
SQUARE DEnclosure Boxes for Square D NQ Series Panels

SQUARE D Panelboard Enclosure: 56 in Lg, 1, 42 Spaces, 600 A Amps, Steel, 22P074/3TZ08/3TZ09

The Square D MH56 Panelboard Enclosure is a Type 1 steel enclosure for NQ Series panels, measuring 56 inches in length and 20 inches in width. It supports 42 spaces, a 600 A rating, and surface mounting, with…

SKU 3G-OTH-722310

Brand
SQUARE D
Item
Panelboard Enclosure: 56 in Lg, 1, 42 Spaces, 600 A Amps, Steel, 22P074/3TZ08/3TZ09
Category
Enclosure Boxes for Square D NQ Series Panels
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Technical Specifications

SQUARE D
Manufacturer Part Number
MH56
Type
1, Steel, 22P074/3TZ08/3TZ09
Material
Steel
Wd
20 in
Amps
600 A
Spaces
42
NEMA Rating
1
Mounting Style
Surface
Compatible Three Phase Interior
3TZ09
Compatible Single Phase Interior
NQOD54L225CU
View Full Spec Sheet

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

Product Description

The Square D MH56 Panelboard Enclosure is a Type 1 steel enclosure for NQ Series panels, measuring 56 inches in length and 20 inches in width. It supports 42 spaces, a 600 A rating, and surface mounting, with compatibility for single-phase interior NQOD54L225CU and three-phase interior 3TZ09.

Frequently Asked Questions

What is the Square D MH56 panelboard enclosure used for?

The Square D MH56 is a Type 1 steel enclosure for NQ Series panelboards, used in commercial and industrial electrical distribution to house circuit breakers and protect wiring. It supports surface mounting, 42 spaces, and a 600 A rating, accommodating single-phase interior NQOD54L225CU or three-phase interior 3TZ09.

What are the specifications of the Square D MH56 enclosure?

The Square D MH56 enclosure measures 56 inches long by 20 inches wide, with a 600 A ampacity and 42 spaces. It is made of steel with a NEMA 1 rating for indoor use, surface-mount style, and is compatible with single-phase interior NQOD54L225CU and three-phase interior 3TZ09. The manufacturer part number is MH56.

Where to buy the Square D MH56 panelboard enclosure worldwide?

3G Electric supplies the Square D MH56 panelboard enclosure worldwide, handling full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source genuine Square D equipment and support procurement across 14 departments. Contact us for availability and lead time.

How to select the right interior for the Square D MH56 enclosure?

Select the interior based on your system phase: use single-phase interior NQOD54L225CU for single-phase applications or three-phase interior 3TZ09 for three-phase. Ensure the interior matches the enclosure's 42-space, 600 A rating. Always verify compatibility with your panelboard design and local electrical codes before ordering.

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.

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