Eaton DH266NPK Safety Switch - UL Listed, NEMA 4
Part Number: DH266NPK
Quick Summary
Eaton DH266NPK heavy duty fusible safety switch provides safe power isolation for industrial electrical systems. In real-world deployments, downtime and safety risk rise when enclosures are undersized or wiring isn’t clearly organized. This unit is UL Listed and built with a NEMA 4 painted steel enclosure and NEC 230.62 compliant barrier, helping facilities meet harsh environments and regulatory requirements. Its 600 A amperage rating and fusible-with-neutral design support clean, code-compliant protection for two-pole, three-wire circuits. The combination of Class H fuses and robust enclosure simplifies maintenance, reduces field wiring errors, and lowers long-term operating costs while improving system reliability. Engineers benefit from compatible installations, fast service, and scalable protection for future upgrades.
Product Information
Extended Description
DH266NPK Eaton: Eaton Heavy duty single-throw fused safety switch, 600 A, NEMA 4, Painted steel, Class H, Fusible with neutral, Two-pole, Three-wire, 600 V, (1)#2-(1)600 kcmil and (1)#1/0-(1)750 kcmil Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH266NPK
UPC
786685926469
Product Length/Depth
64 in
Product Height
13 in
Product Width
26 in
Product Weight
140 lb
Compliances
NEC 230.62 (C) Compliant Barrier
Certifications
UL Listed
Enclosure
NEMA 4
Enclosure material
Painted steel
Fuse class provision
Class H
Fuse configuration
Fusible with neutral
Number Of Poles
Two-pole
Number of wires
3
Type
Heavy duty fusible safety switch
Amperage Rating
600A
NEMA rating
NEMA 4
Voltage rating
600 V
Feature → Business Impact → Application: The DH266NPK delivers a 600 A amperage rating for direct protection of high-load circuits, enabling tighter coordination with upstream devices and reducing nuisance trips in heavy motor feeds. This translates to fewer unplanned shutdowns and improved production uptime in manufacturing lines and processing plants. The fusible-with-neutral, two-pole design simplifies wiring layouts in control panels, supports compliant circuit isolation, and limits arc flash exposure during maintenance. Applications include motor feeders and control circuits in industrial facilities where reliable power isolation is critical for safety and performance. With Class H fuse provision, operators gain durable fault protection while maintaining serviceability, lowering replacement costs and simplifying procurement of compatible fuses. The NEMA 4 painted steel enclosure withstands washdown and harsh environments, ensuring long-term enclosure integrity and reduced maintenance cycles. This unit also pairs well with standard 600 V systems, enabling straightforward installation and future scalability for automation upgrades.
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FAQs
The DH266NPK is ideal for industrial control panels, motor feeders, and distribution stages in manufacturing and processing environments. Its NEMA 4 enclosure, 600 A rating, and fusible-with-neutral configuration support safe isolation in damp or harsh areas while maintaining straightforward installation and maintenance workflows.
Fusible with neutral provides a coordinated path for fault current and neutral return, enabling precise protection for both legs of a two-pole circuit. This simplifies wiring, reduces miswiring risks during installation, and improves fault clearance behavior, which translates to lower downtime and safer maintenance procedures.
Yes, the DH266NPK features NEC 230.62 compliant barrier construction and a NEMA 4 enclosure, meaning it is designed for both indoor and weather-exposed locations. This provides splash resistance and environmental protection, enabling installation in washdown areas or outdoor panels without compromising safety or performance.
The switch is rated for 600 A and 600 V, suitable for heavy-duty motor and feeder protection. Wire sizing should follow the device’s fuse class and conductor requirements, typically aligning with Class H fuse specifications and manufacturer installation guidelines for copper or aluminum conductors up to the noted ampacity and voltage, ensuring compliant termination and safe shutdowns.
Expected maintenance benefits include reduced field wiring errors, straightforward fuse replacement, and durable enclosure integrity. ROI stems from lower downtime, fewer unplanned outages, and longer service intervals, particularly in high-load applications where reliable isolation and easy component replacement contribute to overall plant reliability and safety.