326 X open case

Artificial Resistive Load (326X)

Cost-effective, Portable Light weight Artificial Load Box

The TESCO 326X Artificial Resistive Load (Catalog No. 326X) is a modernized, field-ready load box designed for metering and utility testing environments that require a single, fixed 50A
resistive load. Built on the same design principles as the 326P, the 326X provides the same rugged construction, portability, and reliability—now optimized for applications requiring a
consistent, high-current load.

Weighing only 13 lbs., the 326X is one of the lightest artificial resistive load devices available, making it ideal for utility field personnel who need dependable 50A load performance
without the bulk of traditional load boxes. The unit supports multiple voltage inputs and retains the durable fieldfocused design TESCO is known for. As with all TESCO field instruments, the 326X is engineered for long-term reliability under real-world operating conditions.

SKU: 326X Category:
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Description

Key Features:

  • Fixed 50A High-Current Load: Purpose-built for applications requiring a dependable, single 50A load—ideal for simplified or standardized testing procedures.
  • Lightweight & Portable: Only 13 lbs., making the 326X extremely easy to transport, carry, and deploy in the field.
  • Wide Voltage Compatibility: Supports 69V to 480V (69V optional), covering common utility voltage scenarios.
  • Durable TESCO Construction: Engineered to withstand harsh field environments with the ruggedness expected of all TESCO equipment.
  • Industry Standard Design: A fixed-load variation of the long-standing TESCO artificial load line—maintaining trusted functionality while optimizing for simplicity.
  • Fixed High-Current Operation: Provides a single, stable 50A resistive load, ensuring repeatable performance for calibration, verification, and diagnostic testing.
  • Modernized Build for Field Conditions: Updated to 21st-century standards with improved portability and durability.
  • Optional Accessories for Expanded Capability: Compatible with TESCO’s ecosystem of field tools including cable sets, click switches, field bags, and test plugs.
  • Custom Voltage Options: Custom voltage versions are available to accommodate specialized utility testing requirements.

Specifications

Specification Details
Category Field Equipment – Artificial Resistive Load
Dimensions 11” × 7” × 10” (W × D × H)
Weight 13 lbs.
Input Voltages 69V / 120V / 240V / 277V / 480V

  • 69V option available
  • Custom voltages available upon request
Load Output Fixed 50A resistive load
Full Load Current 50A
Warranty 2 Years

Product Documents

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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.