Eaton FD903920-4FS Ground Mounted Disconnect Enclosure - NEMA 12/4
Part Number: FD903920-4FS
Quick Summary
Eaton FD903920-4FS ground mounted disconnect enclosure provides robust, code-compliant circuit protection for industrial facilities. Engineers often struggle with weather exposure, secure locking provisions, and space constraints during installation and maintenance. UL 508A, CSA C22.2, and NEMA ratings ensure safe operation and regulatory compliance in demanding environments. With a carbon steel construction, oil-resistant gasket, hinged cover, and ground mounting legs, this enclosure delivers reliability in harsh spaces while simplifying compliance and service. By integrating durable materials and standardized features, it reduces field wiring time, lowers lifecycle costs, and supports scalable protection for electrical distribution systems.
Product Information
Extended Description
FD903920-4FS Eaton: Eaton B-Line series ground mounted disconnect enclosure, 90"height, 20"length, 39"width, NEMA 4, Hinged cover, FD4FS enclosure, Ground mount, Large single door, No mounting provisions, Carbon steel, Oil-resistant gasket
Product Name
Eaton B-Line series ground mounted disconnect enclosure
Catalog Number
FD903920-4FS
UPC
782051474480
Product Length/Depth
20 in
Product Height
90 in
Product Width
39 in
Product Weight
520.3 lb
Certifications
UL 508A CSA C22.2. NEMA
Material
Carbon steel
Wall thickness
12 gauge
Finish color
Painted
Color
ANSI 61 gray
Style
Large single door
Model
FD12FS enclosure
Cover type
Hinged
Mounting method
Ground
Mounting hole details
Ground mount legs
Ground provisions
Ground studs on door and body
Locking provisions
Defeater padlock provision
O-rings and gasket type
Oil-resistant gasket
Closure type
Hinged
Special features
3-pt latching handle
Bottom knockouts
12
NEMA Rating
12 4
Country of origin
US
Large ground mounted enclosure
Accessories section of Enclosure Catalog
Accessories section of Enclosure Catalog
Eaton Specification Sheet - FD903920-4FS
Feature: Ground mounting with dedicated ground legs and ground studs on the door and body. Business Impact: Provides stable installation, minimizes vibration and misalignment, and simplifies grounding conductor attachment for dependable performance in outdoor or rugged spaces. Application: Ideal for service disconnects in manufacturing floors and outdoor substations. Feature: Generous interior with 90 in height, 39 in width, and 20 in depth. Business Impact: Maximizes internal volume for disconnects, cabling, and future expansion, reducing rework and enabling compliant routing. Application: Suitable for large single-door disconnects in centralized electrical rooms. Feature: 12 gauge carbon steel with an oil-resistant gasket and hinged cover. Business Impact: Delivers durable protection against dust, moisture, and oil ingress while enabling easy, secure access. Application: Harsh environments requiring reliable sealing and serviceability. Feature: 3-point latching handle and defeater padlock provision. Business Impact: Enhances security and tamper resistance while maintaining straightforward manual operation. Application: Critical distribution panels in regulated spaces. Feature: Ground provisions and 12 bottom knockouts. Business Impact: Flexible conduit and wiring options with straightforward mounting and future-proofing. Application: Field installations demanding versatile wiring layouts and robust grounding. Feature: Compliance and materials overview. Business Impact: Ensures adherence to UL 508A, CSA C22.2, and NEMA ratings with a durable carbon steel build and clear labeling. Application: Industrial protection enclosures across manufacturing and distribution sectors.
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FAQs
Plan for ground mounting using the included ground legs and ground studs on both the door and body. Allocate space for the large 90 in by 39 in by 20 in footprint, confirm a level surface, and ensure proper gasket seating. Use the 12 bottom knockouts to route cables and select compatible padlock or lockset for security.
Yes. The enclosure is UL 508A and CSA C22.2 certified, in addition to a NEMA rating supporting 12 and 4. This combination provides validated protection against dust, water ingress, and oil exposure while meeting electrical distribution standards for industrial settings.
Suitable for harsh industrial environments, including outdoor and damp indoor spaces, due to its NEMA 12/4 rating, oil-resistant gasket, and carbon steel construction. The hinged cover and large interior support easy maintenance, service access, and future expansion of disconnect assemblies.
It includes a defeater padlock provision and a 3-point latching handle with a hinged cover, enhancing tamper resistance while ensuring smooth operation. Grounding provisions on both door and body improve electrical safety and reliability during maintenance and servicing.
Ground mounting provides stable installation with reduced vibration, easier alignment, and straightforward wiring. The roomy 90 x 39 x 20 inch interior accommodates future upgrades, lowering replacement costs and downtime while meeting ongoing compliance requirements for electrical distribution.