Manual transfer switch · 100A 2-pole 240 VAC non-fused NEMA 1 indoor · Eaton 1DT223NF

What this product is for

This manual transfer switch is used to transfer a 240 VAC load between two power sources, such as utility and generator supply. It is a non-fused, double-throw safety switch rated 100A with a 2-pole configuration for indoor installations.

Use for

Use for manual source transfer in commercial, industrial, agricultural, and building service applications where a technician or qualified operator will change from normal power to standby power. Commonly selected when upstream overcurrent protection is already provided.

Avoid for

Avoid for applications that require automatic transfer, outdoor exposure, or integral fuse protection inside the switch. Do not use where a weatherproof enclosure or automatic transfer sequence is required.

Best for

Best for electricians and contractors needing a 100A indoor double-throw switch for alternate-source transfer with a straightforward manual operating method. Suitable where a heavy-duty non-fusible switch is preferred over a more complex automatic transfer assembly.

Installed in

Typically installed in electrical rooms, service areas, plant rooms, and other indoor locations. The enclosure is NEMA 1 indoor type. Typical applications include generator changeover, source selection, and load transfer between normal and standby feeds.

Why this product exists

This product provides a code-oriented manual means of transferring a load from one source to another without backfeeding both sources at the same time. Because it is non-fused, it is commonly used where branch or feeder protection is handled elsewhere in the system.

Typical buying guidance: a 100A transfer switch is commonly selected to match a 100A service, feeder, or distribution section, but actual suitability depends on conductor sizing, available fault current, upstream protection, and local electrical code.

Compared with similar products

Compared with fusible transfer switches, this non-fused model reduces component count when overcurrent protection is already upstream. Compared with outdoor NEMA 3R models, this version is intended for indoor use only. Compared with automatic transfer switches, it requires manual operation and is generally chosen for simpler standby systems.

Specifications

• Manufacturer: Eaton
• Part number: 1DT223NF
• Product type: Manual double-throw transfer switch
• Current rating: 100A
• Poles: 2
• Voltage rating: 240 VAC
• Construction: Non-fused
• Enclosure type: NEMA 1 indoor
• Material: Painted steel
• Mounting: Surface mount, typical for this switch class

Estimated application note: non-fused transfer switches are typically used where separate upstream overcurrent protection is already in place. Actual performance and code compliance depend on installation conditions, conductor terminations, available fault current, and local electrical code.