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Gray carbon steel wall-mount enclosure 20x16x7 with hinged solid cover and clamps

Wiegmann

Wiegmann B-CH Enclosure 20x16x7 Gray 14 ga NEMA 12 13

SKU CH-5MTA-FH1S4

Wall-mount carbon-steel enclosure rated NEMA 12 and 13 with screwdown clamps and poured-in-place gasket

  • Product typeBus Plugs
  • NEMA 12/13 rating protects against dust and dripping water
  • 14-gauge carbon steel construction provides structural rigidity
  • seamless poured polyurethane gasket maintains a continuous seal
  • hinged cover with screw-down clamps secures internal components
  • external mounting feet simplify wall installation

Wiegmann B-CH Enclosure 20x16x7

This carbon-steel enclosure carries NEMA 12 and 13 ratings for indoor protection against dust, dirt and non-corrosive liquids. It is built for industrial control panels, junction boxes or bus-plug housings that must stay sealed in factory or plant environments. The 14-gauge body and ANSI 61 gray polyester powder finish resist corrosion and mechanical wear.

Thermal management and sealing

A seamless polyurethane poured-in-place gasket creates a continuous seal between the solid cover and the body, keeping contaminants out without relying on adhesive strips. The screw-down clamps and external mounting feet hold the cover firmly, so the gasket maintains compression through normal vibration and temperature swings. No active cooling is required for the enclosure itself.

Behaviour under sustained load

The solid cover and clamp closure keep the internal volume sealed during extended operation, so any heat generated by installed components remains contained until it dissipates through the steel walls. The usable opening depth of 6.88 in and the included 2W828 interior panel give installers room to arrange breakers or terminal blocks without crowding. CSA, cULus and UL listings confirm the construction meets the stated NEMA ratings for continuous service.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $363.99
Pricier than about 90% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameWIEGMANN
Product typeBus Plugs

Questions about this item

How do I mount the B-CH enclosure on a wall using the external mounting feet?

Secure the four external mounting feet directly to the wall with bolts or lag screws; the common mistake is skipping shims on uneven surfaces, which can twist the 14 ga carbon steel body and prevent the screwdown clamps from sealing the polyurethane gasket.

What part of the enclosure will need replacement first under normal use?

The seamless polyurethane poured-in-place gasket is the primary wear item; it can compress or degrade over time and should be inspected whenever the solid cover is removed for interior access.

At what depth does the usable interior space limit cable bending or device installation?

The usable opening depth is 6.88 in, so any component or cable bend radius must fit within that dimension from the inner face of the solid cover to the back panel.

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