Automatic Transfer Switches
Automatic Switch Co. (Asco)
Zenith Controls, Inc. (GE)
Busway
General Electric (GE)
Cable Tray
B-Line
Channel (Strut)
B-Line

Circuit Breakers
Cutler Hammer (Custom Electrical Systems is not an authorized supplier of Cutler Hammer products)
General Electric (GE)
Siemens (Custom Electrical Systems is not an authorized supplier of Siemens products)
Square D (Custom Electrical Systems is not an authorized supplier of Square D products)
Contactors / Lighting Contactors
Automatic Switch Co. (Asco)
Custom Lighting Control Cabinets®
General Electric (GE)

Current Transformers

Accuenergy
Electric Metering Corporation
Emon-Dmon
GE Multilin
SymCom Inc.
Veris Industries

Current Transformer (CT) Cabinets

Comed Approved- St. Charles Approved-Naperville Approved
Distribution Equipment (Custom)
Custom Electrical Systems, Inc.®
Erickson Electrical Equipment

Enclosures
B-Line
Custom®
Hammond Mfg
Milbank

Energy Efficient Control and Devices

Honeywell
Intermatic
Veris Industries

Fans
Markel Electric Heating Products
TPI Corp. 
Fuses
Edison Fuse
Mersen (Formally Ferraz)

Generator

Cummins
Generac
Inland

Heating (Electric)
Columbus Electric
Easy-Heat, Inc.
Environmental Technology Inc. (ETI)
Fostoria Industries, Inc.
Honeywell
King Electric Heaters
Markel Electric Heating Products
Mars Air Curtains
Raychem Corp.
TPI Corp.
World Dryer Corp.

Lighting Controls

Automatic Switch Co. (ASCO)

Custom Lighting Control Panels

General Electric (GE)

Intermatic

Load Centers

General Electric (GE)

Lugs

General Electric (GE)

Ilsco

Metering
Accuenergy
Custom Meter Cabinets®
Emon-Dmon
Erickson Electrical Equipment
General Electric (GE)
GE Fanuc
Milbank Mfg. Metering Co.
SymCom Inc.
Veris Industries

Motor Control Centers
General Electric (GE)
Motor Protection Devices
Edison Fuse
GE Multilin
Mersen (Formally Ferraz)
SymCom Inc.

Panelboards
Custom ®
Custom Distribution Panelboards®
General Electric (GE)
Push Buttons & Pilot Devices
Automatic Switch Co. (Asco)
General Electric (GE)

Relays
General Electric (GE)
MDI Incorporated
Veris Industries
Safety Switches & Disconnects
General Electric (GE)
Starters (Combination & Non-Combination)
Cerus
General Electric (GE)

Switchboards
Custom®
General Electric (GE)
Switchgear
General Electric (GE)
Time clocks
Intermatic
Transformers
Acme
Federal Pacific Transformers
Forest Electric Co. (Felco)
General Electric (GE)
Hammond
Jefferson Electric
MGM Transformers

Surge Protection Device (SPD) formerly (TVSS)
Automatic Switch Co. (Asco)
General Electric (GE)
Intermatic
Lea
Uninterruptible Power Supplies (UPS)

Cutler Hammer Powerware

General Electric (GE)
Liebert
Voltage Monitors
Accuenergy
Emon-Dmon
GE Fanuc
SymCom Inc.
Veris Industries
Variable Frequency Drives
Danfoss (Industrial)
General Electric (GE) Commercial & Industrial 
Honeywell

 

Line Card

Accuenergy
ACME Transformers
Automatic Switch Co. (Asco)
B-Line
Cerus
Columbus Electric
Cummins Generators
Custom

Cutler Hammer Powerware

Danfoss
Easy-Heat, Inc.
Edison Fuse
Electric Metering Corporation
Emon-Dmon
Environmental Technology Inc. (ETI)
Erickson Electrical Equipment
Federal Pacific Transformers
Forest Electric Co. (Felco)

Fostoria Industries, Inc.
Generac Generators
General Electric (GE)
GE Fanuc
GE Multilin
Hammond Transformers
Hammond Manufacturing Enclosures 
Honeywell
Ilsco
Inland Generators
Intermatic
Jefferson Transformers
King Electric Heaters

Lea
Liebert
Markel Electric Heating Products
(Northern Illinois HVAC Representative)
Mars Air Curtains
MDI Incorporated

Mersen
MGM Transformers
Milbank Mfg. Metering Co.
Raychem Corp.
SymCom Inc.
TPI Corp.
Veris Industries
World Dryer Corp.
Zenith Controls, Inc. (GE)

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© Custom Electrical Systems, Inc. | 176 N Brandon Dr, Glendale Heights, IL 60139 | (630) 595-9191