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Overview
- Universal cutout compatibility for Type 4 and 12 disconnect enclosures
- Includes adapter plate and interlocking components for door synchronization
- Compatible with Eaton Cutler-Hammer C361 disconnect switches
- Required for Bulletin A21, A28, A34, A35, and A4L3D HOFFMAN enclosures
- Installation instructions included; select handle size based on disconnect rating
- A 400A (or greater) disconnect switch and 600A (or greater) circuit breaker require the large handle
- A 200A (or less) disconnect switch and 400A (or less) circuit breaker require a small handle
Specifications
Color | Gray |
Material | Steel |
Nema Rating | Type 4 and 12 |
Package Dimensions (L x W x H) | 19.25 IN x 4.5 IN x 3 IN |
Package Dimensions (L x W x H) | 48.895 cm x 11.43 cm x 7.62 cm |
Package Weight (Imperial) | 3.100 L |
Package Weight (Metric) | 1.406 kg |
H8084HLL
8x8x4 Polycarbonate Enclosure NEMA 4X | Hinged Cover | Gray | Stainless Steel Locking Latch | Mounting Feet
AB253
The NEMA 3R enclosures feature a standard padlock-able handle feature. They are galvanised steel coated with Pulvalar 115 powder
RC75
Non-metallic snap style Romex connector for confined and tight areas. It is made of heat treated carbon steel with a bright finish. The connector is sized for one cable and is listed for 14/2, 12/2, 10/2, 14/3, 12/3, and 10/3 cable.
How to Install the A21CHVA Operator Adapter for Cutler-Hammer Variable Depth Mechanisms
This guide provides step-by-step instructions for installing the Hoffman A21CHVA Operator Adapter with Cutler-Hammer C361 and C371 variable depth operating mechanisms in floor-mounted enclosures with the disconnect on the right flange. Ensure proper function and safety after installation.
Estimated time: 1h 30m
Tools needed:
Screwdriver, Wrench, Drill, Tap set, Cutting tool
Supplies needed:
Hoffman Mounting Plate (Item 1), Plate Gasket (Item 2), 1/4-20x1/2 Pan Head Screws (4), Slide Arm (Item 4), Shoulder Collar (Item 5), 1/4-20x7/8 Hex Head Screw (1), 1/4 Spring Lockwasher (1), Flat Washers (2), 1/4 Internal Lockwashers (2), 1/4-20 Hex Nuts (2), Hoffman Door Catch (Item 11), 10-32x3/8 Pan Head Screws (2), #10 Internal Lockwashers (2), Cutler-Hammer C361 or C371 Handle Mechanism, Cutler-Hammer Door Hasp, Cutler-Hammer Disconnect Switch or Circuit Breaker, Cutler-Hammer Connecting Rod
- Install Mounting Plate and Gasket
Install the mounting plate (Item 1) and plate gasket (Item 2) on the inside of the enclosure, positioning them behind the provided rectangular opening. Secure them in place using the four 1/4-20x1/2 Pan Head screws (Item 3).
- Prepare Cutler-Hammer Handle Mechanism
Discard the Cutler-Hammer spring bracket, which is typically installed inside the enclosure flange behind the C-H handle mechanism. When assembling the C-H handle mechanism, omit the cap screw and lockwasher that would normally fit into its bottom hole.
- Assemble Handle Mechanism to Mounting Plate
Assemble the Cutler-Hammer handle mechanism to the mounting plate (Item 1) that was installed in Step 1. Ensure the cap screw and lockwasher for the bottom hole are omitted as per Step 2.
- Install Slide Arm and Shoulder Collar
Install the slide arm (Item 4) over the defeater part of the C-H handle assembly, ensuring the notch faces the door opening. Insert the smaller diameter end of the shoulder collar (Item 5) through the oval slot in the slide arm. Install the long 1/4-20x7/8 Hex Head screw (Item 6) with the 1/4 Spring lockwasher (Item 7) through the shoulder collar into the bottom mounting hole of the C-H handle mechanism and tighten. Verify that the slide arm and defeater move up and down smoothly. Install the Cutler-Hammer door hasp according to Cutler-Hammer instructions.
- Attach Slide Arm to Lock Release Mechanism
Attach the bottom of the slide arm (Item 4) to the offset arm of the lock release mechanism. Use two flat washers (Item 8), two 1/4 Internal lockwashers (Item 9), and two 1/4-20 hex nuts (Item 10). Do not tighten these components until the parts are adjusted in the next step.
- Adjust Handle Safety Lock Release Mechanism
Adjust the handle safety lock release mechanism in two places. First, check the factory-installed roller bracket; the door latch should hit the latch stop when the door is closed and latched. Adjust the roller bracket up or down if necessary. Second, adjust the length of the slide arm assembly so that the safety lock on the Cutler-Hammer handle mechanism releases just before the master door is fully latched. Lengthen the slide arm if the safety lock releases too soon, or shorten it if it releases too late. Once adjusted, tighten the nuts from Step 5.
- Attach Door Catch
Attach the Hoffman door catch (Item 11) to the tapped spacer on the door using the bottom set of mounting holes. Secure it with two 10-32x3/8 Pan Head screws (Item 12) and two #10 Internal lockwashers (Item 13). The door catch prevents the door from opening when the handle mechanism is in the 'ON' position. Bend the door catch up or down as needed to properly hook onto the door hasp of the Cutler-Hammer handle mechanism.
- Prepare Panel for Disconnect Mounting
Drill and tap holes in the panel as indicated in the provided diagrams and Table 1 of the original documentation. Refer to Cutler-Hammer instructions for locating any additional holes required for fuse clips.
- Mount Disconnect Switch or Circuit Breaker
Mount the disconnect switch or circuit breaker using Cutler-Hammer instructions and parts. The Cutler-Hammer connecting rod must be cut to the appropriate length as specified in the Cutler-Hammer instructions, referencing Table 2 for depth dimensions.
Frequently Asked Questions about nVent
What industries and applications are nVent products used for?
nVent products are engineered for critical infrastructure and industrial applications across multiple demanding sectors. Key markets include Construction, Data Centers, Defense, Healthcare, Mining, Oil & Gas Refineries, Power Plants, Rail/Transit, Renewable Energy, Security, Ship Building, Steel Mills, Telecom, and Utilities. Their solutions are designed to withstand extreme environmental conditions, with temperature ranges from -55°C to 105°C and specialized features like UV resistance, oil resistance, and flame resistance.
What environmental ratings do nVent products have?
nVent enclosures feature comprehensive environmental ratings, including UL 508A, CSA, and NEMA Type 1, 2, 3, 4, 4X, 12, and 13 certifications. They are rated IEC 60529 IP66, providing robust protection against dust, water, and corrosion in both indoor and outdoor environments. These products operate effectively in temperatures ranging from -40°F to 266°F, with enhanced UV inhibitors for outdoor weathering and oil-resistant gaskets for superior sealing.
What accessories are available for nVent products?
nVent offers a comprehensive range of accessories across multiple product lines, including EMC accessories like bonding cable clamps and strain reliefs, inline accessories such as lock inserts and mounting brackets, CONCEPT accessories including panel conversion kits and rack-mount angles, and seismic accessories for specialized mounting requirements. Key accessory categories include grounding kits, DIN rail mounting solutions, panel supports, handles, and various mounting hardware compatible with different enclosure types.
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nVent products meet critical international certifications including UL (United States), CSA (Canada), CE (European Community), and EAC (Russia). Our products are designed to comply with rigorous industrial standards such as NEMA enclosure ratings, IEC 60529 IP ratings, and international safety standards across multiple industrial markets including oil & gas, power, manufacturing, and infrastructure.
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