nVent HOFFMAN MAS IP66 Mild Steel Wall Mounted Enclosure Guide

nVent HOFFMAN MAS Mild Steel Single Door Enclosure – Selection, Features and Installation Guide

Smidmart Knowledge Base

nVent HOFFMAN MAS Mild Steel Single Door Enclosure

Selection, features, mounting plate identification, installation checks, and common industrial applications.

```commended image: MAS enclosure product image or Smidmart professional enclosure panel graphic under 1 MB.
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IP66 Protection
Dust and water protection for industrial panels.
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Mild Steel Body
Folded and seam-welded construction.
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Mounting Plate Option
R5 with plate; PER5 without plate.
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Industrial Standards
Type 4/12, IEC 62208, CE, UKCA, UL, DNV.
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Overview

The nVent HOFFMAN MAS is a mild steel, single-door, wall-mounted industrial enclosure used to protect electrical and automation components inside control panels, machines, and plant equipment. It is suitable for applications where dust protection, water resistance, mechanical strength, and clean internal component mounting are required.

The MAS range is commonly used for PLC panels, VFD panels, machine control cabinets, terminal assemblies, instrumentation panels, utility panels, and general industrial automation enclosures.

Important selection note: Manufacturer part numbers ending with PER5 do not include the mounting plate. Choose the R5 version when internal components need to be mounted directly on a supplied mounting plate.

Key Specifications

BrandnVent HOFFMAN
SeriesMAS
Product TypeMild steel single-door wall-mounted enclosure
MaterialMild steel
FinishRAL 7035 structured powder coating
ProtectionIP66, Type 4, Type 12, IK10
Standards / ApprovalsUL 508A, cUL, NEMA/EEMAC Type 4/12, IEC 62208, CE, UKCA, UL, DNV
MountingWall mounted
Door OpeningSurface-mounted door with approximately 130-degree opening

Main Features

  • IP66 enclosure protection: Helps prevent water and dust from entering the enclosure when installed with correctly rated glands, seals, and accessories.
  • Folded and seam-welded body: Provides durable mechanical strength for industrial panel applications.
  • Rear gland plate opening: Supports easier cabling and improves cable access near the mounting plate.
  • Structured RAL 7035 finish: Standard light grey finish suitable for industrial electrical panels.
  • Flexible hinge orientation: Hinges can be arranged for left-hand or right-hand door opening.
  • Anti-vibration lock: Uses nVent HOFFMAN customized double-bit 3 mm lock with 90-degree movement.
  • Three-point locking on larger sizes: 1000 mm high enclosures and above use espagnolette three-point locking.

R5 vs PER5: Which Variant Should You Select?

Variant TypeMounting PlateRecommended Use
R5IncludedUse for PLC, VFD, SMPS, MCB, relay, terminal block, instrumentation and automation component mounting.
PER5Not includedUse only when a mounting plate is not required or when a separate/custom mounting plate will be used.

Typical Applications

PLC Control Panels VFD Panels Machine Control Cabinets Terminal Assemblies Instrumentation Panels Automation Cabinets

How to Select the Correct Size

  1. Check component dimensions: Include PLCs, VFDs, power supplies, relays, terminals, wiring ducts, and cable glands.
  2. Check mounting depth: Ensure the selected depth supports the internal component depth and wiring clearance.
  3. Allow maintenance space: Leave access around wiring ducts, terminals, and heat-generating components.
  4. Confirm cable entry: Plan gland plate usage, cable bending radius, and sealing requirement.
  5. Decide R5 or PER5: Select R5 if mounting plate is required. Select PER5 only when the plate is not needed.
  6. Evaluate environment: For outdoor or harsh areas, check rain hood, corrosion protection, and installation conditions before final selection.

Installation Checklist

  • Verify the model number, dimensions, and mounting plate requirement.
  • Inspect enclosure body, door, gasket, gland plate, lock, and hinges before installation.
  • Use a stable mounting surface that can support the enclosure and installed components.
  • Use glands, plugs, and accessories with suitable environmental ratings.
  • Seal every unused opening to maintain IP protection.
  • Confirm earthing continuity between body, door, mounting plate, and gland plate.
  • Remove all drilling chips and sharp edges after modification.
  • Check door closing, gasket compression, and lock operation before energizing the panel.

Common Mistakes to Avoid

  • Selecting a PER5 part number when a mounting plate is required.
  • Using cable glands with lower environmental rating than the enclosure requirement.
  • Leaving unused holes open after modification.
  • Ignoring component depth and cable bending radius.
  • Installing outdoors without considering rain hood or corrosion protection.
  • Forcing the door closed when wiring or internal components obstruct the door.

When to Contact Smidmart Support

Contact Smidmart support before ordering if you are unsure about enclosure size, mounting plate requirement, outdoor suitability, cable entry arrangement, or replacement accessories.

Need help selecting the correct enclosure?

Share the component list, required panel size, installation location, cable entry requirement, and preferred mounting plate option.

Smidmart Support: sales@smidmart.com | www.smidmart.com

FAQ

Does every MAS enclosure include a mounting plate?

No. MAS part numbers ending with PER5 do not include the mounting plate. Select R5 models when a mounting plate is required.

Can MAS enclosures be used for outdoor applications?

Outdoor use requires additional evaluation. Consider rain hood, paint system, corrosion protection, cable glands, sealing method, and actual site exposure before installation.

What is the standard colour of MAS enclosure?

The standard finish is RAL 7035 structured powder coating.

Which MAS variant should I choose for PLC or VFD mounting?

Choose the variant with mounting plate. It provides a proper internal mounting surface for PLCs, VFDs, SMPS, relays, contactors, MCBs, terminals, and wiring accessories.