Knife Blade Test Switch

TESCO Test Switches

Utility-grade accuracy. Field-proven reliability. Built for every metering environment.

TESCO test switches are the industry standard for safe, accurate, and repeatable testing of transformer-rated metering installations. Featuring molded base construction, utility-specific configurations, and fast lead times, TESCO delivers the most complete and configurable test switch offering in the market.

Key Features:

  • Short Lead Times – Delivered in 2-4 weeks
  • Utility-Grade Electrical Ratings – 600V insulation, 30A capacity
  • Molded Base Design – Durable, consistent, and field-proven
  • Standards Compliance – Meets EEI, ANSI C12.9, NEMA, H-Q; UL recognized
  • Flexible Pole Counts – Available from 4 to 12 poles
  • High-Visibility Handle Options – Improves safety and identification
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Description

Standard (Base) Test Switch Configuration

Every TESCO test switch starts with a proven, utility-ready base configuration.

Standard Includes:

  • Tin-plated components
  • Standard stud connectors
  • Clear polycarbonate cover
  • Single-color switch handles
  • Molded base construction
  • 600V insulation, 30A capacity

Representative engineering drawings shown for illustration. Final designs are configured per customer requirements.

Basic Test Switch Engineering Sample

Customization Options

Plating

No Plating Tin or Nickel Plating
No Plating Test Switches Nickel Plated

Connectors

Standard stud connectors Box connectors
Standard stud connectors Box connectors

Handle Colors

Single color Bi-color / half-color
Single color Handle Bi-color / half-color Handle

Electrical Configurations

Reverse potential available
Reverse potential available

Covers

Available in Black polycarbonate

Captured Hardware: No loose screws. No lost parts. No field frustration.

Applications

  • Transformer-rated metering installations
  • Field testing and verification
  • Commissioning and maintenance
  • Utility-specific metering programs

How to Specify a TESCO Test Switch

We’ll help you finalize the right configuration.

Most utilities start with a few key requirements. From there, our team works with you to confirm the final test switch configuration for your application.

When you request a quote, our team will help you define:

  1. Pole count required
  2. Connector type (standard stud or box connectors)
  3. Handle color configuration (single or bi-color)
  4. Reverse potential requirements (if applicable)
  5. Cover and plating preferences

Not sure where to start?

Request a quote and our metering specialists will help you confirm the right configuration.

If you have a photo of the current installation, email it to [email protected]. A clear field image is often the fastest way for our team to confirm compatibility and ensure configuration accuracy.

You may also include any existing specification sheets or legacy drawings. Reference materials help us verify dimensions, mounting requirements, and application details, reducing back-and-forth and preventing ordering errors.

Product Documents

Product Videos

TESCO Meter Test Switch: 105th Anniversary

TESCO Meter Test Switch: 105th Anniversary

Behind the Build - Test Switches

Behind the Build - Test Switches

Accessories

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Disclaimer:

TESCO Metering reserves the right to modify product designs, specifications, features, and documentation at any time as part of our continuous improvement process. All information is provided “as is” and may change without prior notice. While TESCO® strives for accuracy, completeness, and technical reliability, customers should verify the latest product details before making purchasing or engineering decisions. For confirmation of current specifications or application suitability, please contact TESCO® directly.