326 P open case

Artificial Resistive Load (326P)

Cost-effective, Portable Light weight Artificial Load Box

The TESCO 326P Artificial Resistive Load (Catalog No. 326P) is a modernized, field-ready load box designed to meet today’s metering and utility testing requirements. Built upon decades of TESCO engineering expertise, the 326P offers an exceptionally lightweight, portable, and rugged solution for technicians who need reliable, precise resistive loads for verification, calibration, and field diagnostics.

Weighing only 13 lbs., the 326P is one of the lightest artificial resistive loads available, making it ideal for field personnel who require dependable performance without the burden of heavy traditional load boxes. The unit supports multiple voltage inputs and a wide range of selectable full-load and light-load currents, enabling accurate testing across many standard field applications. The 326P continues TESCO’s legacy of producing durable, high-quality utility testing instruments designed to withstand real-world operating conditions.

SKU: 326P Category:
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Description

Key Features:

  • Lightweight & Field Portable: At only 13 lbs., the 326P is easier to handle, transport, and deploy than traditional load boxes—ideal for technicians working across multiple sites.
  • Wide Voltage Compatibility: Supports 69V to 480V (69V optional), covering the most common voltage environments encountered in field metering applications.
  • Selectable Load Taps: Technicians can quickly choose from a range of full-load and light-load current taps to match a variety of testing scenarios.
  • Durable TESCO Construction: Built with the ruggedness, reliability, and longevity expected from all TESCO field instruments.
  • Industry Standard Design: A modern redesign of a proven utility staple, retaining trusted functionality while enhancing portability and performance.
  • Versatile Load Selection: Offers five full-load taps and five light-load taps, allowing precise load application during field testing or troubleshooting.
  • 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, and test plugs.
  • Custom Voltage Options: Custom voltage versions are available to accommodate specialized utility testing requirements.

Specifications

Specification Details
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
Full Load Taps 2.5A, 5A, 15A, 30A, 50A
Light Load Taps 0.25A, 0.5A, 1.5A, 3A, 5A
Safety & Compliance
  • Standard TESCO rugged construction
  • Designed for field use
  • No explicit safety certification listed
Warranty 2 Years

Product Documents

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.