Product Overview
Federal Pacific Class 4102 Style AU14 Non-Reversing AC Motor Contactor
Condition
Unused new old stock (NOS). Complete assembly mounted on a gold-tone metal baseplate with paper wiring schematic sheet and box. Clean with light surface storage marks. Markings legible: FPE A. C. MAGNETIC CONTACTOR NEMA SIZE 1 CLASS 4102 STYLE AU14 Y9390X.
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Product Overview
Federal Pacific Electric Class 4102 Style AU14 is an open-frame, non-reversing AC magnetic contactor built for motor control across commercial and industrial panels. Sized to NEMA 1 standards, this 4-pole contactor is operated by a 115 VAC control coil and handles up to 30 A open or 27 A enclosed at 600 VAC maximum. Polyphase horsepower ratings cover up to 10 HP at 440/550 V, while single-phase ratings support up to 5 HP at 440/550 V. The rugged frame provides direct front-accessible screw terminals with molded arc barriers separating each power pole.
Key Features
- 4-pole contact arrangement with heavy-duty screw terminals
- NEMA Size 1 rating handling 30 A open and 27 A enclosed circuits
- Control coil rated for 115 VAC at 60 Hz
- Maximum system voltage rating of 600 VAC
- Polyphase motor ratings: 3 HP at 110 V, 7.5 HP at 220 V, 10 HP at 440/550 V
- Single-phase motor ratings: 2 HP at 110 V, 3 HP at 220 V, 5 HP at 440/550 V
- Molded arc barriers between contact poles for arc containment
- Form S-86 construction with auxiliary contacts and red control leads
- Includes Federal Pacific wiring diagram covering 2-wire and 3-wire control circuits
Applications
- Replacing worn contactors in vintage motor control centers, machine tool cabinets, and plant distribution panels
- Wiring 2-wire or 3-wire control circuits for dedicated shop air compressors, heavy blowers, and water pumps
- Direct AC power switching for three-phase machine tools in commercial shop maintenance
- Heavy-duty load switching in custom rotary phase converter builds and machinery control projects
Frequently Asked Questions
What is the coil voltage rating on this contactor?
The operating coil is rated for 115 VAC at 60 Hz.
Does this unit include an overload relay block?
No. This assembly is a magnetic contactor without overload relays or heater elements attached.
What control circuit configurations does the included diagram cover?
The included schematic details wiring connections for standard 2-wire control using maintained contacts and 3-wire control using momentary start-stop push-button stations.
There is an unmistakable authority in the solid mechanical snap of a mid-century NEMA contactor that modern modular gear never quite matches. Bolt it in, wire the coil, and let the machinery run like it was meant to.
