Normandy Machine Co. • Powerswitch Inc. • Troy, Missouri • Est. 1941

Electrical Contacts
& Traction Power
Disconnect Systems

The largest aftermarket contact manufacturer in the United States. When the OEM is gone and maintenance has run out of options, we’re the call that keeps the substation running — and the transit system moving.

1941
Year Founded
83+
Years in Service
56K
Sq. Ft. Facility
15+
Transit Authorities
ISO
9001 Certified
Largest U.S. Aftermarket Contact Manufacturer

When the OEM stops supporting it, we still make it. LTC contacts, OCB components, and voltage regulator parts for every major manufacturer.

DC Traction Power Disconnect Systems

35 years and over 10,000 switches in service. From manual disconnects to fully integrated load break switches and complete shop electrification.

Fully Vertically Integrated

CNC milling through final assembly — all in-house. Buy American Act compliant. ISO 9001 certified. Troy, Missouri since 1941.

Engineering Firsts

Innovation & Technology

Early 1990s · Industrial Power

Copper Ridge Optically Isolated VSRs

Copper Ridge Optically Isolated VSRs

The first Voltage Sensing Relays to use optical isolation in high-voltage switching — eliminating conductive paths between bus and control systems. The foundation for everything that followed.

Early 2000s · DART · U.S. Patent

Patented Optical Switch Position Indication

Patented Optical Switch Position Indication

U.S.-patented optical isolation of switch position indication. Zero copper between the high-voltage bus and SCADA I/O cards. DART was the first Absopulse DC-DC installation in U.S. rail history.

2012 · SFMTA · Industry First

Self-Powered Load Break Switches

Self-Powered Load Break Switches

40+ switches since 2012. Rail-powered via DC-DC. Fiber optic multiplexed SCADA via SEL optical MUX. Zero replacements in 13+ years of service.

2000s–2010s · NMC-1 Standard

GE LRT-200 Complete Remanufacture

GE LRT-200 Complete Remanufacture

NMC re-engineered every component of the GE LRT-200 — not a copy, but an improvement on every specification that matters in the field.

2024–2025 · NMC Contacts

Westinghouse Position Indicator Retrofit

Westinghouse Position Indicator Retrofit

Digital display replacement for legacy Westinghouse analog indicators. Drop-in retrofit, no wiring changes. Eliminates the most common failure mode in aging tap changer fleets.

Ongoing · Olin Chemical

Ritter Disconnector Remanufacture — U.S. Based Service

Ritter Disconnector Remanufacture

Remanufacture of Ritter industrial disconnectors using genuine components, assembled and serviced in Troy, Missouri. The only U.S.-based service program of its kind in North America.

OEM Manufacturer Coverage
Allis ChalmersFederal Pacific General ElectricITE / Brown Boveri McGraw EdisonMoloney Pennsylvania / M.E.Westinghouse
Our Mission

Built on Eight Decades of Craft

It is the Mission of Normandy Machine Co. to be an honest, straight-forward business, faithful to our customers and faithful to our employees. It is our mission to be the leader in our field — the best-managed, best-qualified manufacturers of electrical power products in the world.

Founded in 1941 by Harold S. Garrett in a basement in Normandy, Missouri. Today a fourth-generation family business operating a 56,000 sq. ft. facility in Troy, MO.

Manufacturing Capability

Fully In-House — Troy, Missouri

CNC Milling
Water Jet Cutting
Fiberglass Fabrication
Finishing & Plating
CAD/CAM Engineering
Field Support & On-Site Reps

56,000 sq. ft. — Troy, Missouri — Est. 1941

NMC Contacts • Normandy Machine Co.

Utility-Grade Electrical Contacts

We are the largest aftermarket manufacturer of electrical contacts in the United States. We support the substation and utility world when OEMs have discontinued support and maintenance has nowhere left to turn. We repair, remanufacture in whole, and build NMC-1 replacements that exceed the original spec — for every major load tap changer, oil circuit breaker, and voltage regulator on the market. Nationwide field experts and on-site reps available.

All Manufacturers

Complete OEM Coverage

Allis Chalmers

Allis Chalmers LTCs & OCBs

Allis Chalmers

26 product lines. TLH-20 and TLH-21 among the most widely serviced tap changers in the field.

TLH-20 · TLH-21 · TLF · TLH-10 · TLS · BZO · SDO

Federal Pacific

Federal Pacific LTCs & OCBs

Federal Pacific

10 product lines. TC-525 and TC-546 contact kits always in stock. JCE-22 OCB fully supported.

TC-525 · TC-546 · JCE-22 · DST-15-500 · AJ-54-H

General Electric

GE LTCs & OCBs

General Electric

59 product lines including the NMC-1 remanufactured LRT-200 — re-engineered to exceed OEM spec.

LRT-200 · LRT-72 · LRT-68 · FK · FKD · AM-13.8 · LR-500

McGraw Edison

McGraw Edison Regulators & LTCs

McGraw Edison

14 product lines. The 550 series in all variants — one of the most common voltage regulator platforms in North America.

550 · 550B · 550C · 550D · 550E · Cooper Recloser

Moloney

Moloney Tap Changers

Moloney

9 product lines. Complete contact kits and remanufactured assemblies for the full MA, MB, MC, MH, and MJ series.

MA · MB · MA1 · MB1 · MA2 · MC · MH · MJ-2

Pennsylvania / M.E.

Pennsylvania & M.E. LTCs & OCBs

Pennsylvania

25 product lines. NMC is often the only source for CF, CG, AHJ, and CZE series parts no longer available elsewhere.

CF-37 · CF-48 · CG-38 · AHJ-60 · CZE · 394

Westinghouse

Westinghouse LTCs & OCBs

Westinghouse

58 product lines — UTT, UTT-A/B, UZE, URT, URS, TF, and GMB series.

UTT · UTT-A · UTT-B · UZE · URT · TF · GMB

Other OEM Support

Breaker Contacts, Kits, More

Other OEM Support

Contacts for breakers, OCB, LTC, and more. NMC holds the engineering history to produce spec-grade replacements where OEM support is gone.

ABB Parts · ITE OCB · Brown Boveri · Contact kits

NMC-1 Program

The NMC-1 Standard

When a part fails in the field, a copy isn’t always enough. The NMC-1 designation identifies products where NMC engineers have re-engineered the original OEM design — not just replicated it. Each NMC-1 product meets or exceeds the original specification in every respect that matters for service life.

GE LRT-200 Series — Complete Remanufacture
The NMC-1 LRT-200 is re-engineered at the component level. Every wear surface, contact interface, and spring specification reviewed and improved. 26 NMC-1 products in the current catalog.
Beyond Replacement — An Improvement
NMC-1 products carry an amber star designation in the catalog. If an NMC-1 version exists for your application, it is the preferred choice.
Product Categories

What We Make

84 active product lines across seven categories. We repair, remanufacture, and manufacture new. If it goes inside a transformer or substation and has a contact in it, we most likely make the part.

Load Tap Changers
Oil Circuit Breakers
Voltage Regulators
Contacts & Parts
Reclosers
Switch Kits
Parts & Accessories
Powerswitch Inc. • DC Traction Power Disconnects

Traction Power
Disconnect Switches

35 years. Over 10,000 switches manufactured and placed in service. Powerswitch builds everything a transit authority needs — from the switchboard to emergency trip systems, gate and lift interlocks, load break switches, Ritter disconnectors, heater cases, fused disconnects, TWC track circuits, and all controls for all of the above. Every product machined, finished, and assembled in Troy, Missouri.

35+
Years in Transit Power
10,000+
Switches in Service
15+
Transit Authorities
U.S.
Patent Holder

Powerswitch Product Lines

What We Build

Disconnect Switch

Bolt Lock Disconnect

Bolt Lock Disconnect

Manual and motor-operated. Hookstick, bat handle, H-stick operation. Enclosed, pole, pad, and wall-mounted variants. Kirk Key and padlock provisions. Rated to 12kA.

Disconnect Switch

Silver Ball Disconnect

Silver Ball Disconnect

High-cycle silver ball contact design. Single and multi-gang. Manual or motor-operated. Deployed at MBTA, Sound Transit, DART, and RTD.

Load Break Switch

Ritter Load Break Switch

Ritter Load Break Switch

NMC Powerswitch is the sole North American Ritter distributor. Rail-powered via DC-DC — no external control power. Optically isolated SCADA. 4kA and 6kA ratings.

Remote & Motor Operated

Motor Operated Switch

Motor Operated Switch

Full SCADA integration with local/remote hierarchy. Solenoid lock assemblies and custom auxiliary contact packages. Shown: interior mechanism with motor drive, copper contacts, and control board.

Control & Distribution

Switchboard & Control Cabinet

Switchboard & Control Cabinet

Complete traction power switchboards integrating contactors, fuses, and disconnects. NEMA 3R and 4X fiberglass enclosures built in-house to authority specification.

Shop Electrification

Full Shop Electrification

Full Shop Electrification

Design-build: Emergency Trip Systems, Foreman Control Panels, Negative Return Cabinets, stinger and bug systems, full SCADA. Delivered turnkey at Cabot Yard, New Haven, Honolulu, and more.

High-Current Disconnect

Ritter Disconnector — Industrial

Ritter Disconnector — Industrial

On-load and off-load Ritter disconnectors, assembled and serviced in Troy, Missouri using genuine components. The only U.S.-based service program of its kind.

Fused Disconnect

Knife Switch & Fusebox

Knife Switch & Fusebox

Single and multi-pole knife switches 30A through custom ratings. Custom color to authority specification — shown in CTA yellow, 750VDC rated.

Heater Cases

Heater Case with Current Indication

Heater Case with Current Indication

Fused contactors that switch track heaters and track switch heaters on and off. NEMA 3R fiberglass enclosure with current sensing, test switch, door interlock, and 1,000VDC rated components.

Transit Authorities Served

Who We Serve

Chicago, IL

CTA — Chicago Transit Authority

Among our earliest transit relationships. Powerswitch helped develop the CTA automatic bus transfer switch standard still in service decades later.

Boston, MA

MBTA — Massachusetts Bay Transit

107+ products in service: bolt lock disconnects, silver ball switches, and two fully electrified facilities including Cabot Yard.

San Francisco, CA · Since 2012

SFMTA — San Francisco Municipal Railway

40+ self-powered load break switches since 2012. Rail-powered via DC-DC, fiber optic SCADA. Zero replacements in 13+ years of continuous operation.

San Francisco, CA

BART — Bay Area Rapid Transit

Dozens of 4,000A Powerswitch load break switches in service, standardized on the Powerswitch/Ritter platform.

New York, NY

Metro North Railroad

Complete shop electrification at Harmon Yard and New Haven Yard — switchboards, Emergency Trip Systems, Foreman Control Panels, SCADA.

New York, NY

LIRR — Long Island Rail Road

Load break switches and disconnect assemblies standardized on the Powerswitch/Ritter product line.

Dallas, TX · U.S. Patent

DART — Dallas Area Rapid Transit

First DC-DC rail-powered auxiliary system in U.S. rail history. First deployment of Powerswitch patented optical isolation.

Seattle, WA

Sound Transit

Silver ball disconnects, bolt lock assemblies, and pole-mounted remote-operated disconnects across the Puget Sound network.

Denver, CO

RTD — Regional Transportation District

Disconnect switch assemblies and custom enclosures for Denver light rail and commuter rail corridors.

Salt Lake City, UT

UTA — Utah Transit Authority

Powerswitch bolt lock and motor-operated switches across TRAX light rail and FrontRunner commuter rail systems.

Washington, DC

WMATA — Washington Metro

Traction power disconnect equipment for one of the most complex DC distribution networks in North American transit.

Atlanta, GA

MARTA — Metropolitan Atlanta

Disconnect switches and control cabinets supporting the MARTA heavy rail network.

Los Angeles, CA

LA Metro

Load break switches on the Powerswitch/Ritter line serving the expanding LA Metro network.

Ottawa, ON · Canada

OC Transpo — Ottawa

Powerswitch traction power switchgear serving Canada's national capital transit network.

Maryland · Active Program

MTA Maryland

Active five-year program deploying the latest-generation Ritter load break switch across the MTA Maryland system.

Powerswitch Inc.

The Powerswitch Advantage

Powerswitch was born in 1989 out of a recognized gap: transit authorities needed a manufacturer who understood DC traction power as an engineering discipline, not just a parts catalog. Over 35 years and 10,000+ switches, we have built that expertise into everything we make.

We build it all. Switchboards (not switchgear). Emergency trip systems. Gate and lift interlocks. Bug and stinger plug-in power gear. Load break switches. Ritter disconnectors. Heater cases. Fused disconnects. TWC track circuits. And all controls for all of the above.

Fully vertically integrated: CNC milling, water jet cutting, tumbling, finishing, plating, soldering, fiberglass enclosure fabrication, and final assembly — all in-house. Sole North American distributor of Ritter load break switches.

Technical Credentials

Engineering Where Others Stop

PATENT
U.S. Patent — Optical Isolation
Patented optical isolation of switch position indication for traction power. Open, Closed, and Intermediate indication plus voltage presence detection with zero conductive connection to the bus.
RITTER
Sole North American Ritter Distributor
NMC Powerswitch is the only source for new and remanufactured Ritter load break switches and industrial disconnectors in North America.
BAA
Buy American Act Compliant
Every Powerswitch product manufactured in Troy, Missouri. Full BAA compliance documentation available for all federal transit authority procurements.
ISO
ISO 9001 Certified
NMC Powerswitch has maintained ISO 9001 certification continuously. Quality management integrated into every step of fabrication and assembly.
NMC Contacts • Normandy Machine Co.

Parts Catalog

84 active product lines • 8 manufacturers • All manufactured in Troy, Missouri

Normandy Machine Co. • Powerswitch Inc.

About NMC Powerswitch

Fourth-generation family business. 56,000 square feet. Every product made in Troy, Missouri since 1941.

NMC Powerswitch Manufacturing Floor
Watch Facility Tour

Troy, Missouri • Manufacturing Facility Tour

Troy, Missouri • Manufacturing Facility Tour

Mission Statement

Who We Are

It is the Mission of Normandy Machine Co. to be an honest, straight-forward business, faithful to our customers and faithful to our employees. It is our mission to be the leader in our field — the best-managed, best-qualified manufacturers of electrical power products in the world. It is our mission to treat our co-workers and our customers fairly and with respect, so that all of us can enjoy a good quality of life.
Manufacturing Capability

Fully In-House

Nationwide field support and on-site reps
CNC milling — dozens of machining centers
Water jet cutting
Tumbling, finishing, and plating
Soldering and electrical assembly
In-house fiberglass enclosure fabrication
56,000 sq. ft. facility — Troy, Missouri
The Garrett Family

Our History Since 1941

NORMANDY, MO → TROY, MO → WORLD-CLASS MANUFACTURING

1941
Founded — Normandy, MO

Harold S. Garrett starts Normandy Machine in his basement in Normandy, a suburb of St. Louis. Through determination and growing orders the company moves to a concrete block building on St. Louis Ave.

1970
Second Generation

Harold retires and passes NMC to his sons Jim and Wally Garrett. NMC grows to two shifts operating daily.

1979
Troy, Missouri

NMC moves to Troy, MO and doubles in size to 12,000 square feet. A recession follows shortly after the move, but the company perseveres.

1984
Third Generation — Rick & Mike Garrett

Jim and Wally retire. Rick and Mike Garrett take the helm. In 1989, NMC expands into traction power — Powerswitch Inc. is born with partner Dick Angert.

1994
CNC Modernization

NMC modernizes with computerized CNC machines. The company's technical capabilities take a permanent leap forward.

2009
44,000 Sq. Ft. Expansion

Rick purchases and renovates a former shoe factory. NMC moves into an additional 44,000 sq. ft. of manufacturing, storage, and assembly space in Troy, MO.

Today
Fourth Generation

Rick's children, Jim and Krissy, carry the family legacy forward at NMC Powerswitch — continuing the tradition of hands-on leadership Harold started in 1941.

56K SQ FT
World-Class Facility

56,000 sq. ft. in Troy, Missouri — the most advanced CNC capability in our industry, and the same hard-working spirit Harold brought to his basement in 1941.

1941
Founded — Normandy, MO

Harold S. Garrett starts Normandy Machine in his basement in Normandy, a suburb of St. Louis. Through determination and growing orders the company moves to a concrete block building on St. Louis Ave.

1970
Second Generation

Harold retires and passes NMC to his sons Jim and Wally Garrett. NMC grows to two shifts operating daily.

1979
Troy, Missouri

NMC moves to Troy, MO and doubles in size to 12,000 square feet. A recession follows shortly after the move, but the company perseveres.

1984
Third Generation — Rick & Mike Garrett

Jim and Wally retire. Rick and Mike Garrett take the helm. In 1989, NMC expands into traction power — Powerswitch Inc. is born with partner Dick Angert.

1994
CNC Modernization

NMC modernizes with computerized CNC machines. The company's technical capabilities take a permanent leap forward.

2009
44,000 Sq. Ft. Expansion

Rick purchases and renovates a former shoe factory. NMC moves into an additional 44,000 sq. ft. of manufacturing, storage, and assembly space in Troy, MO.

Today
Fourth Generation

Rick's children, Jim and Krissy, carry the family legacy forward at NMC Powerswitch — continuing the tradition of hands-on leadership Harold started in 1941.

56K SQ FT
World-Class Facility

56,000 sq. ft. in Troy, Missouri — the most advanced CNC capability in our industry, and the same hard-working spirit Harold brought to his basement in 1941.

ISO 9001
Quality Management
Certified
Buy American Act
41 U.S.C. §§ 8301–8305
Compliant
U.S. Patent Holder
Optical Isolation of
Switch Position Indication
Est. 1941
Fourth-Generation
Family Business
NMC Powerswitch • Troy, Missouri

Request a Quote

Contact us for pricing, availability, custom orders, or any technical question. We respond to all inquiries directly.

Get in Touch

Contact Information

Fax
(636) 528-8937
NMC Contacts — Utility
sales@normandymachine.com
Powerswitch — Transit
powerswitch@normandymachine.com
Address
815 E. Cherry Street
Troy, MO 63379
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